konard · March 14, 2026 14:08
diff --git a/solution-draft-log-pr-1773497285840.txt b/solution-draft-log-pr-1773497285840.txt
 # Solve.mjs Log - 2026-03-14T13:26:47.136Z

 [2026-03-14T13:26:47.137Z] [INFO] 📁 Log file: /home/hive/solve-2026-03-14T13-26-47-136Z.log
 [2026-03-14T13:26:47.138Z] [INFO]    (All output will be logged here)
 [2026-03-14T13:26:48.030Z] [INFO] 
 [2026-03-14T13:26:48.031Z] [INFO] 🚀 solve v1.31.2
 [2026-03-14T13:26:48.031Z] [INFO] 🔧 Raw command executed:
 [2026-03-14T13:26:48.031Z] [INFO]    /home/hive/.nvm/versions/node/v20.20.1/bin/node /home/hive/.bun/bin/solve https://github.com/link-foundation/start/issues/96 --model opus-4-6 --attach-logs --verbose --no-tool-check --auto-resume-on-limit-reset --auto-restart-until-mergeable --tokens-budget-stats
 [2026-03-14T13:26:48.031Z] [INFO] 
 [2026-03-14T13:26:48.045Z] [INFO] 
 [2026-03-14T13:26:48.045Z] [WARNING] ⚠️  SECURITY WARNING: --attach-logs is ENABLED
 [2026-03-14T13:26:48.045Z] [INFO] 
 [2026-03-14T13:26:48.046Z] [INFO]    This option will upload the complete solution draft log file to the Pull Request.
 [2026-03-14T13:26:48.046Z] [INFO]    The log may contain sensitive information such as:
 [2026-03-14T13:26:48.046Z] [INFO]    • API keys, tokens, or secrets
 [2026-03-14T13:26:48.046Z] [INFO]    • File paths and directory structures
 [2026-03-14T13:26:48.046Z] [INFO]    • Command outputs and error messages
 [2026-03-14T13:26:48.046Z] [INFO]    • Internal system information
 [2026-03-14T13:26:48.047Z] [INFO] 
 [2026-03-14T13:26:48.047Z] [INFO]    ⚠️  DO NOT use this option with public repositories or if the log
 [2026-03-14T13:26:48.047Z] [INFO]        might contain sensitive data that should not be shared publicly.
 [2026-03-14T13:26:48.047Z] [INFO] 
 [2026-03-14T13:26:48.047Z] [INFO]    Continuing in 5 seconds... (Press Ctrl+C to abort)
 [2026-03-14T13:26:48.047Z] [INFO] 
 [2026-03-14T13:26:53.055Z] [INFO] 
 [2026-03-14T13:26:53.073Z] [INFO] 💾 Disk space check: 40050MB available (2048MB required) ✅
 [2026-03-14T13:26:53.074Z] [INFO] 🧠 Memory check: 10382MB available, swap: none, total: 10382MB (256MB required) ✅
 [2026-03-14T13:26:53.088Z] [INFO] ⏩ Skipping tool connection validation (dry-run mode or skip-tool-connection-check enabled)
 [2026-03-14T13:26:53.089Z] [INFO] ⏩ Skipping GitHub authentication check (dry-run mode or skip-tool-connection-check enabled)
 [2026-03-14T13:26:53.089Z] [INFO] 📋 URL validation:
 [2026-03-14T13:26:53.089Z] [INFO]    Input URL: https://github.com/link-foundation/start/issues/96
 [2026-03-14T13:26:53.089Z] [INFO]    Is Issue URL: true
 [2026-03-14T13:26:53.089Z] [INFO]    Is PR URL: false
 [2026-03-14T13:26:53.090Z] [INFO] 🔍 Checking repository access for auto-fork...
 [2026-03-14T13:26:53.744Z] [INFO]    Repository visibility: public
 [2026-03-14T13:26:53.744Z] [INFO] ✅ Auto-fork: Write access detected to public repository, working directly on repository
 [2026-03-14T13:26:53.745Z] [INFO] 🔍 Checking repository write permissions...
 [2026-03-14T13:26:54.057Z] [INFO] ✅ Repository write access: Confirmed
 [2026-03-14T13:26:54.381Z] [INFO]    Repository visibility: public
 [2026-03-14T13:26:54.382Z] [INFO]    Auto-cleanup default: false (repository is public)
 [2026-03-14T13:26:54.383Z] [INFO] 🔍 Auto-continue enabled: Checking for existing PRs for issue #96...
 [2026-03-14T13:26:54.383Z] [INFO] 🔍 Checking for existing branches in link-foundation/start...
 [2026-03-14T13:26:54.677Z] [INFO] 📋 Found 1 existing branch(es) in main repo matching pattern 'issue-96-*':
 [2026-03-14T13:26:54.677Z] [INFO]   • issue-96-efde41b8c023
 [2026-03-14T13:26:55.010Z] [INFO] 📝 No existing PRs found for issue #96 - creating new PR
 [2026-03-14T13:26:55.011Z] [INFO] ✅ Using existing branch from main repo: issue-96-efde41b8c023
 [2026-03-14T13:26:55.011Z] [INFO]    Found 1 matching branch(es), selected most recent
 [2026-03-14T13:26:55.315Z] [INFO]    Branch issue-96-efde41b8c023 has a MERGED PR #97 - cannot reuse
 [2026-03-14T13:26:55.316Z] [INFO]    Will create a new branch for issue #96
 [2026-03-14T13:26:55.316Z] [INFO] 📝 Issue mode: Working with issue #96
 [2026-03-14T13:26:55.317Z] [INFO] 
 Creating temporary directory: /tmp/gh-issue-solver-1773494815317
 [2026-03-14T13:26:55.319Z] [INFO] 
 📥 Cloning repository:       link-foundation/start
 [2026-03-14T13:26:56.342Z] [INFO] ✅ Cloned to:                /tmp/gh-issue-solver-1773494815317
 [2026-03-14T13:26:56.422Z] [INFO] 
 📌 Default branch:           main
 [2026-03-14T13:26:56.446Z] [INFO] 
 🌿 Creating branch:          issue-96-829d21ddabc4 from main (default)
 [2026-03-14T13:26:56.468Z] [INFO] 🔍 Verifying:                Branch creation...
 [2026-03-14T13:26:56.480Z] [INFO] ✅ Branch created:           issue-96-829d21ddabc4
 [2026-03-14T13:26:56.480Z] [INFO] ✅ Current branch:           issue-96-829d21ddabc4
 [2026-03-14T13:26:56.480Z] [INFO]    Branch operation: Create new branch
 [2026-03-14T13:26:56.480Z] [INFO]    Branch verification: Matches expected
 [2026-03-14T13:26:56.484Z] [INFO] 
 🚀 Auto PR creation:         ENABLED
 [2026-03-14T13:26:56.484Z] [INFO]      Creating:               Initial commit and draft PR...
 [2026-03-14T13:26:56.485Z] [INFO] 
 [2026-03-14T13:26:56.485Z] [INFO]    Using .gitkeep mode (--claude-file=false, --gitkeep-file=true, --auto-gitkeep-file=true)
 [2026-03-14T13:26:56.485Z] [INFO] 📝 Creating:                 .gitkeep (default)
 [2026-03-14T13:26:56.485Z] [INFO]    Issue URL from argv['issue-url']: https://github.com/link-foundation/start/issues/96
 [2026-03-14T13:26:56.486Z] [INFO]    Issue URL from argv._[0]: undefined
 [2026-03-14T13:26:56.486Z] [INFO]    Final issue URL: https://github.com/link-foundation/start/issues/96
 [2026-03-14T13:26:56.486Z] [INFO] ✅ File created:             .gitkeep
 [2026-03-14T13:26:56.486Z] [INFO] 📦 Adding file:              To git staging
 [2026-03-14T13:26:56.522Z] [INFO]    Git status after add: A  .gitkeep
 [2026-03-14T13:26:56.523Z] [INFO] 📝 Creating commit:          With .gitkeep file
 [2026-03-14T13:26:56.546Z] [INFO] ✅ Commit created:           Successfully with .gitkeep
 [2026-03-14T13:26:56.546Z] [INFO]    Commit output: [issue-96-829d21ddabc4 7ffa4db] Initial commit with task details
 1 file changed, 1 insertion(+)
 create mode 100644 .gitkeep
 [2026-03-14T13:26:56.557Z] [INFO]    Commit hash: 7ffa4db...
 [2026-03-14T13:26:56.569Z] [INFO]    Latest commit: 7ffa4db Initial commit with task details
 [2026-03-14T13:26:56.587Z] [INFO]    Git status: clean
 [2026-03-14T13:26:56.596Z] [INFO]    Remotes: origin	https://github.com/link-foundation/start.git (fetch)
 [2026-03-14T13:26:56.605Z] [INFO]    Branch info: * issue-96-829d21ddabc4 7ffa4db [origin/main: ahead 1] Initial commit with task details
  main                  9f76e0a [origin/main] 0.24.9
 [2026-03-14T13:26:56.605Z] [INFO] 📤 Pushing branch:           To remote repository...
 [2026-03-14T13:26:56.606Z] [INFO]    Push command: git push -u origin issue-96-829d21ddabc4
 [2026-03-14T13:26:57.383Z] [INFO]    Push exit code: 0
 [2026-03-14T13:26:57.384Z] [INFO]    Push output: remote: 
 remote: Create a pull request for 'issue-96-829d21ddabc4' on GitHub by visiting:        
 remote:      https://github.com/link-foundation/start/pull/new/issue-96-829d21ddabc4        
 remote: 
 To https://github.com/link-foundation/start.git
 * [new branch]      issue-96-829d21ddabc4 -> issue-96-829d21ddabc4
 branch 'issue-96-829d21ddabc4' set up to track 'origin/issue-96-829d21ddabc4'.
 [2026-03-14T13:26:57.384Z] [INFO] ✅ Branch pushed:            Successfully to remote
 [2026-03-14T13:26:57.385Z] [INFO]    Push output: remote: 
 remote: Create a pull request for 'issue-96-829d21ddabc4' on GitHub by visiting:        
 remote:      https://github.com/link-foundation/start/pull/new/issue-96-829d21ddabc4        
 remote: 
 To https://github.com/link-foundation/start.git
 * [new branch]      issue-96-829d21ddabc4 -> issue-96-829d21ddabc4
 branch 'issue-96-829d21ddabc4' set up to track 'origin/issue-96-829d21ddabc4'.
 [2026-03-14T13:26:57.385Z] [INFO]    Waiting for GitHub to sync...
 [2026-03-14T13:26:59.848Z] [INFO]    Compare API check: 1 commit(s) ahead of main
 [2026-03-14T13:26:59.848Z] [INFO]    GitHub compare API ready: 1 commit(s) found
 [2026-03-14T13:27:00.110Z] [INFO]    Branch verified on GitHub: issue-96-829d21ddabc4
 [2026-03-14T13:27:00.433Z] [INFO]    Remote commit SHA: 7ffa4db...
 [2026-03-14T13:27:00.433Z] [INFO] 📋 Getting issue:            Title from GitHub...
 [2026-03-14T13:27:00.726Z] [INFO]    Issue title: "`agent --version` does not work in screen isolation"
 [2026-03-14T13:27:00.727Z] [INFO] 👤 Getting user:             Current GitHub account...
 [2026-03-14T13:27:01.015Z] [INFO]    Current user: konard
 [2026-03-14T13:27:01.276Z] [INFO]    User has collaborator access
 [2026-03-14T13:27:01.277Z] [INFO]    User has collaborator access
 [2026-03-14T13:27:01.278Z] [INFO] 🔄 Fetching:                 Latest main branch...
 [2026-03-14T13:27:01.683Z] [INFO] ✅ Base updated:             Fetched latest main
 [2026-03-14T13:27:01.684Z] [INFO] 🔍 Checking:                 Commits between branches...
 [2026-03-14T13:27:01.699Z] [INFO]    Commits ahead of origin/main: 1
 [2026-03-14T13:27:01.700Z] [INFO] ✅ Commits found:            1 commit(s) ahead
 [2026-03-14T13:27:01.700Z] [INFO] 🔀 Creating PR:              Draft pull request...
 [2026-03-14T13:27:01.700Z] [INFO] 🎯 Target branch:            main (default)
 [2026-03-14T13:27:01.700Z] [INFO]    PR Title: [WIP] `agent --version` does not work in screen isolation
 [2026-03-14T13:27:01.701Z] [INFO]    Base branch: main
 [2026-03-14T13:27:01.702Z] [INFO]    Head branch: issue-96-829d21ddabc4
 [2026-03-14T13:27:01.702Z] [INFO]    Assignee: konard
 [2026-03-14T13:27:01.703Z] [INFO]    PR Body:
 ## 🤖 AI-Powered Solution Draft

 This pull request is being automatically generated to solve issue #96.

 ### 📋 Issue Reference
 Fixes #96

 ### 🚧 Status
 **Work in Progress** - The AI assistant is currently analyzing and implementing the solution draft.

 ### 📝 Implementation Details
 _Details will be added as the solution draft is developed..._

 ---
 *This PR was created automatically by the AI issue solver*
 [2026-03-14T13:27:01.704Z] [INFO]    Command: cd "/tmp/gh-issue-solver-1773494815317" && gh pr create --draft --title "$(cat '/tmp/pr-title-1773494821703.txt')" --body-file "/tmp/pr-body-1773494821703.md" --base main --head issue-96-829d21ddabc4 --assignee konard
 [2026-03-14T13:27:04.283Z] [INFO] 🔍 Verifying:                PR creation...
 [2026-03-14T13:27:04.585Z] [INFO] ✅ Verification:             PR exists on GitHub
 [2026-03-14T13:27:04.586Z] [INFO] ✅ PR created:               #98
 [2026-03-14T13:27:04.586Z] [INFO] 📍 PR URL:                   https://github.com/link-foundation/start/pull/98
 [2026-03-14T13:27:04.586Z] [INFO] 👤 Assigned to:              konard
 [2026-03-14T13:27:04.586Z] [INFO] 🔗 Linking:                  Issue #96 to PR #98...
 [2026-03-14T13:27:04.912Z] [INFO]    Issue node ID: I_kwDOP85RQM7y7tp3
 [2026-03-14T13:27:05.238Z] [INFO]    PR node ID: PR_kwDOP85RQM7Kmot-
 [2026-03-14T13:27:05.556Z] [INFO] 
 [2026-03-14T13:27:05.557Z] [WARNING] ⚠️ ISSUE LINK MISSING:       PR not linked to issue
 [2026-03-14T13:27:05.558Z] [INFO] 
 [2026-03-14T13:27:05.559Z] [WARNING]    The PR wasn't linked to issue #96
 [2026-03-14T13:27:05.559Z] [WARNING]    Expected: "Fixes #96" in PR body
 [2026-03-14T13:27:05.560Z] [INFO] 
 [2026-03-14T13:27:05.561Z] [WARNING]    To fix manually:
 [2026-03-14T13:27:05.561Z] [WARNING]    1. Edit the PR description at: https://github.com/link-foundation/start/pull/98
 [2026-03-14T13:27:05.562Z] [WARNING]    2. Ensure it contains: Fixes #96
 [2026-03-14T13:27:05.562Z] [INFO] 
 [2026-03-14T13:27:05.854Z] [INFO]   👤 Current user:           konard
 [2026-03-14T13:27:05.854Z] [INFO] 
 📊 Comment counting conditions:
 [2026-03-14T13:27:05.855Z] [INFO]    prNumber: 98
 [2026-03-14T13:27:05.855Z] [INFO]    branchName: issue-96-829d21ddabc4
 [2026-03-14T13:27:05.855Z] [INFO]    isContinueMode: false
 [2026-03-14T13:27:05.855Z] [INFO]    Will count comments: true
 [2026-03-14T13:27:05.856Z] [INFO] 💬 Counting comments:        Checking for new comments since last commit...
 [2026-03-14T13:27:05.856Z] [INFO]    PR #98 on branch: issue-96-829d21ddabc4
 [2026-03-14T13:27:05.857Z] [INFO]    Owner/Repo: link-foundation/start
 [2026-03-14T13:27:06.174Z] [INFO]   📅 Last commit time (from API): 2026-03-14T13:26:56.000Z
 [2026-03-14T13:27:06.983Z] [INFO]   💬 New PR comments:        0
 [2026-03-14T13:27:06.983Z] [INFO]   💬 New PR review comments: 0
 [2026-03-14T13:27:06.984Z] [INFO]   💬 New issue comments:     0
 [2026-03-14T13:27:06.984Z] [INFO]    Total new comments: 0
 [2026-03-14T13:27:06.984Z] [INFO]    Comment lines to add: No (saving tokens)
 [2026-03-14T13:27:06.984Z] [INFO]    PR review comments fetched: 0
 [2026-03-14T13:27:06.984Z] [INFO]    PR conversation comments fetched: 0
 [2026-03-14T13:27:06.984Z] [INFO]    Total PR comments checked: 0
 [2026-03-14T13:27:09.337Z] [INFO]    Feedback info will be added to prompt:
 [2026-03-14T13:27:09.338Z] [INFO]      - Pull request description was edited after last commit
 [2026-03-14T13:27:09.338Z] [INFO] 📅 Getting timestamps:       From GitHub servers...
 [2026-03-14T13:27:09.643Z] [INFO]   📝 Issue updated:          2026-03-14T13:26:21.000Z
 [2026-03-14T13:27:09.905Z] [INFO]   💬 Last comment:           2026-03-14T13:26:21.000Z
 [2026-03-14T13:27:10.429Z] [INFO]   🔀 Recent PR:              2026-03-14T13:27:02.000Z
 [2026-03-14T13:27:10.430Z] [INFO] 
 ✅ Reference time:           2026-03-14T13:27:02.000Z
 [2026-03-14T13:27:10.430Z] [INFO] 
 🔍 Checking for uncommitted changes to include as feedback...
 [2026-03-14T13:27:10.452Z] [INFO] ✅ No uncommitted changes found
 [2026-03-14T13:27:12.133Z] [INFO] ℹ️  Playwright MCP not detected - browser automation hints will be disabled
 [2026-03-14T13:27:12.241Z] [INFO] 👁️  Model vision capability: supported
 [2026-03-14T13:27:12.243Z] [INFO] 
 📝 Final prompt structure:
 [2026-03-14T13:27:12.243Z] [INFO]    Characters: 266
 [2026-03-14T13:27:12.243Z] [INFO]    System prompt characters: 11925
 [2026-03-14T13:27:12.243Z] [INFO]    Feedback info: Included
 [2026-03-14T13:27:12.245Z] [INFO] 
 🤖 Executing Claude:         OPUS-4-6
 [2026-03-14T13:27:12.245Z] [INFO]    Model: sonnet
 [2026-03-14T13:27:12.245Z] [INFO]    Working directory: /tmp/gh-issue-solver-1773494815317
 [2026-03-14T13:27:12.245Z] [INFO]    Branch: issue-96-829d21ddabc4
 [2026-03-14T13:27:12.246Z] [INFO]    Prompt length: 266 chars
 [2026-03-14T13:27:12.246Z] [INFO]    System prompt length: 11925 chars
 [2026-03-14T13:27:12.246Z] [INFO]    Feedback info included: Yes (1 lines)
 [2026-03-14T13:27:12.259Z] [INFO] 📈 System resources before execution:
 [2026-03-14T13:27:12.260Z] [INFO]    Memory: MemFree:         8668136 kB
 [2026-03-14T13:27:12.260Z] [INFO]    Load: 0.16 0.15 0.16 2/364 289576
 [2026-03-14T13:27:12.260Z] [INFO] 
 📝 Raw command:              
 [2026-03-14T13:27:12.260Z] [INFO] (cd "/tmp/gh-issue-solver-1773494815317" && claude --output-format stream-json --verbose --dangerously-skip-permissions --model claude-opus-4-6 -p "Issue to solve: https://github.com/link-foundation/start/issues/96
 Your prepared branch: issue-96-829d21ddabc4
 Your prepared working directory: /tmp/gh-issue-solver-1773494815317
 Your prepared Pull Request: https://github.com/link-foundation/start/pull/98

 Proceed.
 " --append-system-prompt "You are an AI issue solver. You prefer to find the root cause of each and every issue. When you talk, you prefer to speak with facts which you have double-checked yourself or cite sources that provide evidence, like quote actual code or give references to documents or pages found on the internet. You are polite and patient, and prefer to assume good intent, trying your best to be helpful. If you are unsure or have assumptions, you prefer to test them yourself or ask questions to clarify requirements.
 General guidelines.
   - When you execute commands, always save their logs to files for easier reading if the output becomes large.
   - When running commands, do not set a timeout yourself — let them run as long as needed (default timeout - 2 minutes is more than enough), and once they finish, review the logs in the file.
   - When running sudo commands (especially package installations like apt-get, yum, npm install, etc.), always run them in the background to avoid timeout issues and permission errors when the process needs to be killed. Use the run_in_background parameter or append & to the command.
   - When CI is failing or user reports failures, consider adding a detailed investigation protocol to your todo list with these steps:
      Step 1: List recent runs with timestamps using: gh run list --repo link-foundation/start --branch issue-96-829d21ddabc4 --limit 5 --json databaseId,conclusion,createdAt,headSha
      Step 2: Verify runs are after the latest commit by checking timestamps and SHA
      Step 3: For each non-passing run, download logs to preserve them: gh run view {run-id} --repo link-foundation/start --log > ci-logs/{workflow}-{run-id}.log
      Step 4: Read each downloaded log file using Read tool to understand the actual failures
      Step 5: Report findings with specific errors and line numbers from logs
      This detailed investigation is especially helpful when user mentions CI failures, asks to investigate logs, you see non-passing status, or when finalizing a PR.
      Note: If user says \"failing\" but tools show \"passing\", this might indicate stale data - consider downloading fresh logs and checking timestamps to resolve the discrepancy.
   - When a code or log file has more than 1500 lines, read it in chunks of 1500 lines.
   - When facing a complex problem, do as much tracing as possible and turn on all verbose modes.
   - When you create debug, test, or example/experiment scripts for fixing, always keep them in an ./examples and/or ./experiments folders so you can reuse them later.
   - When testing your assumptions, use the experiment scripts, and add it to ./experiments folder.
   - When your experiments can show real world use case of the software, add it to ./examples folder.
   - When you face something extremely hard, use divide and conquer — it always helps.

 Initial research.
   - When you start, make sure you create detailed plan for yourself and follow your todo list step by step, make sure that as many points from these guidelines are added to your todo list to keep track of everything that can help you solve the issue with highest possible quality.
   - When user mentions CI failures or asks to investigate logs, consider adding these todos to track the investigation: (1) List recent CI runs with timestamps, (2) Download logs from failed runs to ci-logs/ directory, (3) Analyze error messages and identify root cause, (4) Implement fix, (5) Verify fix resolves the specific errors found in logs.
   - When you read issue, read all details and comments thoroughly.
   - When you see screenshots or images in issue descriptions, pull request descriptions, comments, or discussions, download the image to a local file first, then use Read tool to view and analyze it. IMPORTANT: Before reading downloaded images with the Read tool, verify the file is a valid image (not HTML). Use a CLI tool like 'file' command to check the actual file format. Reading corrupted or non-image files (like GitHub's \"Not Found\" pages saved as .png) can cause \"Could not process image\" errors and will crash the AI solver process. If the file command shows \"HTML\", \"text\", or \"ASCII text\", the download FAILED — do NOT call Read on this file. Instead: (1) For images from GitHub issues/PRs (URLs containing \"github.com/user-attachments\"), these require authentication — retry with: curl -L -H \"Authorization: token \$(gh auth token)\" -o <filename> \"<url>\" (2) If retry still fails, skip the image and note it was unavailable.
   - When you need issue details, use gh issue view https://github.com/link-foundation/start/issues/96.
   - When you need related code, use gh search code --owner link-foundation [keywords].
   - When you need repo context, read files in your working directory.
   - When you study related work, study the most recent related pull requests.
   - When issue is not defined enough, write a comment to ask clarifying questions.
   - When accessing GitHub Gists (especially private ones), use gh gist view command instead of direct URL fetching to ensure proper authentication.
   - When you are fixing a bug, please make sure you first find the actual root cause, do as many experiments as needed.
   - When you are fixing a bug and code does not have enough tracing/logs, add them and make sure they stay in the code, but are switched off by default.
   - When you need comments on a pull request, note that GitHub has THREE different comment types with different API endpoints:
      1. PR review comments (inline code comments): gh api repos/link-foundation/start/pulls/98/comments --paginate
      2. PR conversation comments (general discussion): gh api repos/link-foundation/start/issues/98/comments --paginate
      3. PR reviews (approve/request changes): gh api repos/link-foundation/start/pulls/98/reviews --paginate
      IMPORTANT: The command \"gh pr view --json comments\" ONLY returns conversation comments and misses review comments!
   - When you need latest comments on issue, use gh api repos/link-foundation/start/issues/96/comments --paginate.

 Solution development and testing.
   - When issue is solvable, implement code with tests.
   - When implementing features, search for similar existing implementations in the codebase and use them as examples instead of implementing everything from scratch.
   - When coding, each atomic step that can be useful by itself should be commited to the pull request's branch, meaning if work will be interrupted by any reason parts of solution will still be kept intact and safe in pull request.
   - When you test:
      start from testing of small functions using separate scripts;
      write unit tests with mocks for easy and quick start.
   - When you test integrations, use existing framework.
   - When you test solution draft, include automated checks in pr.
   - When issue is unclear, write comment on issue asking questions.
   - When you encounter any problems that you unable to solve yourself (any human feedback or help), write a comment to the pull request asking for help.
   - When you need human help, use gh pr comment 98 --body \"your message\" to comment on existing PR.

 Preparing pull request.
   - When you code, follow contributing guidelines.
   - When you commit, write clear message.
   - When you need examples of style, use gh pr list --repo link-foundation/start --state merged --search [keywords].
   - When you open pr, describe solution draft and include tests.
   - When there is a package with version and GitHub Actions workflows for automatic release, update the version (or other necessary release trigger) in your pull request to prepare for next release.
   - When you update existing pr 98, use gh pr edit to modify title and description.
   - When you are about to commit or push code, ALWAYS run local CI checks first if they are available in contributing guidelines (like ruff check, mypy, eslint, etc.) to catch errors before pushing.
   - When you finalize the pull request:
      follow style from merged prs for code, title, and description,
      make sure no uncommitted changes corresponding to the original requirements are left behind,
      make sure the default branch is merged to the pull request's branch,
      make sure all CI checks passing if they exist before you finish,
      check for latest comments on the issue and pull request to ensure no recent feedback was missed,
      double-check that all changes in the pull request answer to original requirements of the issue,
      make sure no new new bugs are introduced in pull request by carefully reading gh pr diff,
      make sure no previously existing features were removed without an explicit request from users via the issue description, issue comments, and/or pull request comments.
   - When you finish implementation, use gh pr ready 98.

 Workflow and collaboration.
   - When you check branch, verify with git branch --show-current.
   - When you push, push only to branch issue-96-829d21ddabc4.
   - When you finish, create a pull request from branch issue-96-829d21ddabc4. (Note: PR 98 already exists, update it instead)
   - When you organize workflow, use pull requests instead of direct merges to default branch (main or master).
   - When you manage commits, preserve commit history for later analysis.
   - When you contribute, keep repository history forward-moving with regular commits, pushes, and reverts if needed.
   - When you face conflict that you cannot resolve yourself, ask for help.
   - When you collaborate, respect branch protections by working only on issue-96-829d21ddabc4.
   - When you mention result, include pull request url or comment url.
   - When you need to create pr, remember pr 98 already exists for this branch.

 Self review.
   - When you check your solution draft, run all tests locally.
   - When you check your solution draft, verify git status shows a clean working tree with no uncommitted changes.
   - When you compare with repo style, use gh pr diff [number].
   - When you finalize, confirm code, tests, and description are consistent.

 GitHub CLI command patterns.
   - IMPORTANT: Always use --paginate flag when fetching lists from GitHub API to ensure all results are returned (GitHub returns max 30 per page by default).
   - When listing PR review comments (inline code comments), use gh api repos/OWNER/REPO/pulls/NUMBER/comments --paginate.
   - When listing PR conversation comments, use gh api repos/OWNER/REPO/issues/NUMBER/comments --paginate.
   - When listing PR reviews, use gh api repos/OWNER/REPO/pulls/NUMBER/reviews --paginate.
   - When listing issue comments, use gh api repos/OWNER/REPO/issues/NUMBER/comments --paginate.
   - When adding PR comment, use gh pr comment NUMBER --body \"text\" --repo OWNER/REPO.
   - When adding issue comment, use gh issue comment NUMBER --body \"text\" --repo OWNER/REPO.
   - When viewing PR details, use gh pr view NUMBER --repo OWNER/REPO.
   - When filtering with jq, use gh api repos/\${owner}/\${repo}/pulls/\${prNumber}/comments --paginate --jq 'reverse | .[0:5]'.

 Visual UI work and screenshots.
   - When you work on visual UI changes (frontend, CSS, HTML, design), include a render or screenshot of the final result in the pull request description.
   - When you need to show visual results, take a screenshot and save it to the repository (e.g., in a docs/screenshots/ or assets/ folder).
   - When you save screenshots to the repository, use permanent links in the pull request description markdown (e.g., https://github.com/link-foundation/start/blob/issue-96-829d21ddabc4/docs/screenshots/result.png?raw=true).
   - When uploading images, commit them to the branch first, then reference them using the GitHub blob URL format with ?raw=true suffix (works for both public and private repositories).
   - When the visual result is important for review, mention it explicitly in the pull request description with the embedded image." | jq -c .)
 [2026-03-14T13:27:12.261Z] [INFO] 
 [2026-03-14T13:27:12.261Z] [INFO] 📋 User prompt:
 [2026-03-14T13:27:12.261Z] [INFO] ---BEGIN USER PROMPT---
 [2026-03-14T13:27:12.261Z] [INFO] Issue to solve: https://github.com/link-foundation/start/issues/96
 Your prepared branch: issue-96-829d21ddabc4
 Your prepared working directory: /tmp/gh-issue-solver-1773494815317
 Your prepared Pull Request: https://github.com/link-foundation/start/pull/98

 Proceed.

 [2026-03-14T13:27:12.261Z] [INFO] ---END USER PROMPT---
 [2026-03-14T13:27:12.261Z] [INFO] 📋 System prompt:
 [2026-03-14T13:27:12.261Z] [INFO] ---BEGIN SYSTEM PROMPT---
 [2026-03-14T13:27:12.261Z] [INFO] You are an AI issue solver. You prefer to find the root cause of each and every issue. When you talk, you prefer to speak with facts which you have double-checked yourself or cite sources that provide evidence, like quote actual code or give references to documents or pages found on the internet. You are polite and patient, and prefer to assume good intent, trying your best to be helpful. If you are unsure or have assumptions, you prefer to test them yourself or ask questions to clarify requirements.
 General guidelines.
   - When you execute commands, always save their logs to files for easier reading if the output becomes large.
   - When running commands, do not set a timeout yourself — let them run as long as needed (default timeout - 2 minutes is more than enough), and once they finish, review the logs in the file.
   - When running sudo commands (especially package installations like apt-get, yum, npm install, etc.), always run them in the background to avoid timeout issues and permission errors when the process needs to be killed. Use the run_in_background parameter or append & to the command.
   - When CI is failing or user reports failures, consider adding a detailed investigation protocol to your todo list with these steps:
      Step 1: List recent runs with timestamps using: gh run list --repo link-foundation/start --branch issue-96-829d21ddabc4 --limit 5 --json databaseId,conclusion,createdAt,headSha
      Step 2: Verify runs are after the latest commit by checking timestamps and SHA
      Step 3: For each non-passing run, download logs to preserve them: gh run view {run-id} --repo link-foundation/start --log > ci-logs/{workflow}-{run-id}.log
      Step 4: Read each downloaded log file using Read tool to understand the actual failures
      Step 5: Report findings with specific errors and line numbers from logs
      This detailed investigation is especially helpful when user mentions CI failures, asks to investigate logs, you see non-passing status, or when finalizing a PR.
      Note: If user says "failing" but tools show "passing", this might indicate stale data - consider downloading fresh logs and checking timestamps to resolve the discrepancy.
   - When a code or log file has more than 1500 lines, read it in chunks of 1500 lines.
   - When facing a complex problem, do as much tracing as possible and turn on all verbose modes.
   - When you create debug, test, or example/experiment scripts for fixing, always keep them in an ./examples and/or ./experiments folders so you can reuse them later.
   - When testing your assumptions, use the experiment scripts, and add it to ./experiments folder.
   - When your experiments can show real world use case of the software, add it to ./examples folder.
   - When you face something extremely hard, use divide and conquer — it always helps.

 Initial research.
   - When you start, make sure you create detailed plan for yourself and follow your todo list step by step, make sure that as many points from these guidelines are added to your todo list to keep track of everything that can help you solve the issue with highest possible quality.
   - When user mentions CI failures or asks to investigate logs, consider adding these todos to track the investigation: (1) List recent CI runs with timestamps, (2) Download logs from failed runs to ci-logs/ directory, (3) Analyze error messages and identify root cause, (4) Implement fix, (5) Verify fix resolves the specific errors found in logs.
   - When you read issue, read all details and comments thoroughly.
   - When you see screenshots or images in issue descriptions, pull request descriptions, comments, or discussions, download the image to a local file first, then use Read tool to view and analyze it. IMPORTANT: Before reading downloaded images with the Read tool, verify the file is a valid image (not HTML). Use a CLI tool like 'file' command to check the actual file format. Reading corrupted or non-image files (like GitHub's "Not Found" pages saved as .png) can cause "Could not process image" errors and will crash the AI solver process. If the file command shows "HTML", "text", or "ASCII text", the download FAILED — do NOT call Read on this file. Instead: (1) For images from GitHub issues/PRs (URLs containing "github.com/user-attachments"), these require authentication — retry with: curl -L -H "Authorization: token $(gh auth token)" -o <filename> "<url>" (2) If retry still fails, skip the image and note it was unavailable.
   - When you need issue details, use gh issue view https://github.com/link-foundation/start/issues/96.
   - When you need related code, use gh search code --owner link-foundation [keywords].
   - When you need repo context, read files in your working directory.
   - When you study related work, study the most recent related pull requests.
   - When issue is not defined enough, write a comment to ask clarifying questions.
   - When accessing GitHub Gists (especially private ones), use gh gist view command instead of direct URL fetching to ensure proper authentication.
   - When you are fixing a bug, please make sure you first find the actual root cause, do as many experiments as needed.
   - When you are fixing a bug and code does not have enough tracing/logs, add them and make sure they stay in the code, but are switched off by default.
   - When you need comments on a pull request, note that GitHub has THREE different comment types with different API endpoints:
      1. PR review comments (inline code comments): gh api repos/link-foundation/start/pulls/98/comments --paginate
      2. PR conversation comments (general discussion): gh api repos/link-foundation/start/issues/98/comments --paginate
      3. PR reviews (approve/request changes): gh api repos/link-foundation/start/pulls/98/reviews --paginate
      IMPORTANT: The command "gh pr view --json comments" ONLY returns conversation comments and misses review comments!
   - When you need latest comments on issue, use gh api repos/link-foundation/start/issues/96/comments --paginate.

 Solution development and testing.
   - When issue is solvable, implement code with tests.
   - When implementing features, search for similar existing implementations in the codebase and use them as examples instead of implementing everything from scratch.
   - When coding, each atomic step that can be useful by itself should be commited to the pull request's branch, meaning if work will be interrupted by any reason parts of solution will still be kept intact and safe in pull request.
   - When you test:
      start from testing of small functions using separate scripts;
      write unit tests with mocks for easy and quick start.
   - When you test integrations, use existing framework.
   - When you test solution draft, include automated checks in pr.
   - When issue is unclear, write comment on issue asking questions.
   - When you encounter any problems that you unable to solve yourself (any human feedback or help), write a comment to the pull request asking for help.
   - When you need human help, use gh pr comment 98 --body "your message" to comment on existing PR.

 Preparing pull request.
   - When you code, follow contributing guidelines.
   - When you commit, write clear message.
   - When you need examples of style, use gh pr list --repo link-foundation/start --state merged --search [keywords].
   - When you open pr, describe solution draft and include tests.
   - When there is a package with version and GitHub Actions workflows for automatic release, update the version (or other necessary release trigger) in your pull request to prepare for next release.
   - When you update existing pr 98, use gh pr edit to modify title and description.
   - When you are about to commit or push code, ALWAYS run local CI checks first if they are available in contributing guidelines (like ruff check, mypy, eslint, etc.) to catch errors before pushing.
   - When you finalize the pull request:
      follow style from merged prs for code, title, and description,
      make sure no uncommitted changes corresponding to the original requirements are left behind,
      make sure the default branch is merged to the pull request's branch,
      make sure all CI checks passing if they exist before you finish,
      check for latest comments on the issue and pull request to ensure no recent feedback was missed,
      double-check that all changes in the pull request answer to original requirements of the issue,
      make sure no new new bugs are introduced in pull request by carefully reading gh pr diff,
      make sure no previously existing features were removed without an explicit request from users via the issue description, issue comments, and/or pull request comments.
   - When you finish implementation, use gh pr ready 98.

 Workflow and collaboration.
   - When you check branch, verify with git branch --show-current.
   - When you push, push only to branch issue-96-829d21ddabc4.
   - When you finish, create a pull request from branch issue-96-829d21ddabc4. (Note: PR 98 already exists, update it instead)
   - When you organize workflow, use pull requests instead of direct merges to default branch (main or master).
   - When you manage commits, preserve commit history for later analysis.
   - When you contribute, keep repository history forward-moving with regular commits, pushes, and reverts if needed.
   - When you face conflict that you cannot resolve yourself, ask for help.
   - When you collaborate, respect branch protections by working only on issue-96-829d21ddabc4.
   - When you mention result, include pull request url or comment url.
   - When you need to create pr, remember pr 98 already exists for this branch.

 Self review.
   - When you check your solution draft, run all tests locally.
   - When you check your solution draft, verify git status shows a clean working tree with no uncommitted changes.
   - When you compare with repo style, use gh pr diff [number].
   - When you finalize, confirm code, tests, and description are consistent.

 GitHub CLI command patterns.
   - IMPORTANT: Always use --paginate flag when fetching lists from GitHub API to ensure all results are returned (GitHub returns max 30 per page by default).
   - When listing PR review comments (inline code comments), use gh api repos/OWNER/REPO/pulls/NUMBER/comments --paginate.
   - When listing PR conversation comments, use gh api repos/OWNER/REPO/issues/NUMBER/comments --paginate.
   - When listing PR reviews, use gh api repos/OWNER/REPO/pulls/NUMBER/reviews --paginate.
   - When listing issue comments, use gh api repos/OWNER/REPO/issues/NUMBER/comments --paginate.
   - When adding PR comment, use gh pr comment NUMBER --body "text" --repo OWNER/REPO.
   - When adding issue comment, use gh issue comment NUMBER --body "text" --repo OWNER/REPO.
   - When viewing PR details, use gh pr view NUMBER --repo OWNER/REPO.
   - When filtering with jq, use gh api repos/${owner}/${repo}/pulls/${prNumber}/comments --paginate --jq 'reverse | .[0:5]'.

 Visual UI work and screenshots.
   - When you work on visual UI changes (frontend, CSS, HTML, design), include a render or screenshot of the final result in the pull request description.
   - When you need to show visual results, take a screenshot and save it to the repository (e.g., in a docs/screenshots/ or assets/ folder).
   - When you save screenshots to the repository, use permanent links in the pull request description markdown (e.g., https://github.com/link-foundation/start/blob/issue-96-829d21ddabc4/docs/screenshots/result.png?raw=true).
   - When uploading images, commit them to the branch first, then reference them using the GitHub blob URL format with ?raw=true suffix (works for both public and private repositories).
   - When the visual result is important for review, mention it explicitly in the pull request description with the embedded image.
 [2026-03-14T13:27:12.262Z] [INFO] ---END SYSTEM PROMPT---
 [2026-03-14T13:27:12.262Z] [INFO] 📊 CLAUDE_CODE_MAX_OUTPUT_TOKENS: 128000
 [2026-03-14T13:27:12.263Z] [INFO] 📊 MCP_TIMEOUT: 900000ms (server startup)
 [2026-03-14T13:27:12.263Z] [INFO] 📊 MCP_TOOL_TIMEOUT: 900000ms (tool execution)
 [2026-03-14T13:27:12.263Z] [INFO] 📊 ANTHROPIC_LOG: debug (verbose mode)
 [2026-03-14T13:27:12.263Z] [INFO] 📋 Command details:          
 [2026-03-14T13:27:12.263Z] [INFO]   📂 Working directory:      /tmp/gh-issue-solver-1773494815317
 [2026-03-14T13:27:12.263Z] [INFO]   🌿 Branch:                 issue-96-829d21ddabc4
 [2026-03-14T13:27:12.263Z] [INFO]   🤖 Model:                  Claude OPUS-4-6
 [2026-03-14T13:27:12.263Z] [INFO] 
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 [2026-03-14T13:27:13.622Z] [INFO]   options: {
 [2026-03-14T13:27:13.622Z] [INFO]     method: 'post',
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 [2026-03-14T13:27:13.622Z] [INFO]     body: {
 [2026-03-14T13:27:13.622Z] [INFO]       model: 'claude-opus-4-6',
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 [2026-03-14T13:27:13.626Z] [INFO]     'anthropic-beta': 'claude-code-20250219,oauth-2025-04-20,interleaved-thinking-2025-05-14,context-management-2025-06-27,prompt-caching-scope-2026-01-05,advanced-tool-use-2025-11-20,effort-2025-11-24',
 [2026-03-14T13:27:13.626Z] [INFO]     'anthropic-dangerous-direct-browser-access': 'true',
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 [2026-03-14T13:27:13.627Z] [INFO]     'x-stainless-os': 'Linux',
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 [2026-03-14T13:27:14.815Z] [INFO] [log_9672e9, request-id: "req_011CZ33rL7MbDsnacYRAquZM"] post https://api.anthropic.com/v1/messages?beta=true succeeded with status 200 in 1195ms
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        "content": "     1→/** Screen-specific isolation helpers extracted from isolation.js */\n     2→\n     3→const { execSync, spawnSync } = require('child_process');\n     4→const fs = require('fs');\n     5→const os = require('os');\n     6→const path = require('path');\n     7→\n     8→const setTimeout = globalThis.setTimeout;\n     9→\n    10→// Debug mode from environment\n    11→const DEBUG =\n    12→  process.env.START_DEBUG === '1' || process.env.START_DEBUG === 'true';\n    13→\n    14→// Cache for screen version detection\n    15→let cachedScreenVersion = null;\n    16→let screenVersionChecked = false;\n    17→\n    18→/**\n    19→ * Get the installed screen version\n    20→ * @returns {{major: number, minor: number, patch: number}|null} Version object or null if detection fails\n    21→ */\n    22→function getScreenVersion() {\n    23→  if (screenVersionChecked) {\n    24→    return cachedScreenVersion;\n    25→  }\n    26→\n    27→  screenVersionChecked = true;\n    28→\n    29→  try {\n    30→    const output = execSync('screen --version', {\n    31→      encoding: 'utf8',\n    32→      stdio: ['pipe', 'pipe', 'pipe'],\n    33→    });\n    34→    // Match patterns like \"4.09.01\", \"4.00.03\", \"4.5.1\"\n    35→    const match = output.match(/(\\d+)\\.(\\d+)\\.(\\d+)/);\n    36→    if (match) {\n    37→      cachedScreenVersion = {\n    38→        major: parseInt(match[1], 10),\n    39→        minor: parseInt(match[2], 10),\n    40→        patch: parseInt(match[3], 10),\n    41→      };\n    42→\n    43→      if (DEBUG) {\n    44→        console.log(\n    45→          `[DEBUG] Detected screen version: ${cachedScreenVersion.major}.${cachedScreenVersion.minor}.${cachedScreenVersion.patch}`\n    46→        );\n    47→      }\n    48→\n    49→      return cachedScreenVersion;\n    50→    }\n    51→  } catch {\n    52→    if (DEBUG) {\n    53→      console.log('[DEBUG] Could not detect screen version');\n    54→    }\n    55→  }\n    56→\n    57→  return null;\n    58→}\n    59→\n    60→/**\n    61→ * Check if screen supports the -Logfile option\n    62→ * The -Logfile option was introduced in GNU Screen 4.5.1\n    63→ * @returns {boolean} True if -Logfile is supported\n    64→ */\n    65→function supportsLogfileOption() {\n    66→  const version = getScreenVersion();\n    67→  if (!version) {\n    68→    // If we can't detect version, assume older version and use fallback\n    69→    return false;\n    70→  }\n    71→\n    72→  // -Logfile was added in 4.5.1\n    73→  // Compare: version >= 4.5.1\n    74→  if (version.major > 4) {\n    75→    return true;\n    76→  }\n    77→  if (version.major < 4) {\n    78→    return false;\n    79→  }\n    80→  // major === 4\n    81→  if (version.minor > 5) {\n    82→    return true;\n    83→  }\n    84→  if (version.minor < 5) {\n    85→    return false;\n    86→  }\n    87→  // minor === 5\n    88→  return version.patch >= 1;\n    89→}\n    90→\n    91→/**\n    92→ * Run command in GNU Screen using detached mode with log capture.\n    93→ * Supports screen >= 4.5.1 (native -Logfile) and older versions (tee fallback).\n    94→ * @param {string} command - Command to execute\n    95→ * @param {string} sessionName - Session name\n    96→ * @param {object} shellInfo - Shell info from getShell()\n    97→ * @param {string|null} user - Username to run command as (optional)\n    98→ * @param {Function} wrapCommandWithUser - Function to wrap command with user\n    99→ * @param {Function} isInteractiveShellCommand - Function to check if command is interactive shell\n   100→ * @returns {Promise<{success: boolean, sessionName: string, message: string, output: string}>}\n   101→ */\n   102→function runScreenWithLogCapture(\n   103→  command,\n   104→  sessionName,\n   105→  shellInfo,\n   106→  user = null,\n   107→  wrapCommandWithUser,\n   108→  isInteractiveShellCommand\n   109→) {\n   110→  const { shell, shellArg } = shellInfo;\n   111→  const logFile = path.join(os.tmpdir(), `screen-output-${sessionName}.log`);\n   112→\n   113→  // Check if screen supports -Logfile option (added in 4.5.1)\n   114→  const useNativeLogging = supportsLogfileOption();\n   115→\n   116→  return new Promise((resolve) => {\n   117→    try {\n   118→      let screenArgs;\n   119→      // Wrap command with user switch if specified\n   120→      let effectiveCommand = wrapCommandWithUser(command, user);\n   121→\n   122→      // Temporary screenrc file for native logging path (issue #96)\n   123→      // Setting logfile flush 0 forces screen to flush its log buffer after every write,\n   124→      // preventing output loss for quick-completing commands like `agent --version`.\n   125→      // Without this, screen buffers log writes and flushes every 10 seconds by default.\n   126→      let screenrcFile = null;\n   127→\n   128→      if (useNativeLogging) {\n   129→        // Modern screen (>= 4.5.1): Use -L -Logfile option for native log capture\n   130→        // Use a temporary screenrc with `logfile flush 0` to force immediate log flushing\n   131→        // (issue #96: quick commands like `agent --version` lose output without this)\n   132→        screenrcFile = path.join(os.tmpdir(), `screenrc-${sessionName}`);\n   133→        try {\n   134→          fs.writeFileSync(screenrcFile, 'logfile flush 0\\n');\n   135→        } catch {\n   136→          // If we can't create the screenrc, proceed without it (best effort)\n   137→          screenrcFile = null;\n   138→        }\n   139→\n   140→        // screen -dmS <session> -c <screenrc> -L -Logfile <logfile> <shell> -c '<command>'\n   141→        const logArgs = screenrcFile\n   142→          ? ['-dmS', sessionName, '-c', screenrcFile, '-L', '-Logfile', logFile]\n   143→          : ['-dmS', sessionName, '-L', '-Logfile', logFile];\n   144→        screenArgs = isInteractiveShellCommand(command)\n   145→          ? [...logArgs, ...command.trim().split(/\\s+/)]\n   146→          : [...logArgs, shell, shellArg, effectiveCommand];\n   147→\n   148→        if (DEBUG) {\n   149→          console.log(\n   150→            `[DEBUG] Running screen with native log capture (-Logfile): screen ${screenArgs.join(' ')}`\n   151→          );\n   152→        }\n   153→      } else {\n   154→        // Older screen (< 4.5.1, e.g., macOS bundled 4.0.3): Use tee fallback\n   155→        // The parentheses ensure proper grouping of the command and its stderr\n   156→        const isBareShell = isInteractiveShellCommand(command);\n   157→        if (!isBareShell) {\n   158→          effectiveCommand = `(${effectiveCommand}) 2>&1 | tee \"${logFile}\"`;\n   159→        }\n   160→        screenArgs = isBareShell\n   161→          ? ['-dmS', sessionName, ...command.trim().split(/\\s+/)]\n   162→          : ['-dmS', sessionName, shell, shellArg, effectiveCommand];\n   163→\n   164→        if (DEBUG) {\n   165→          console.log(\n   166→            `[DEBUG] Running screen with tee fallback (older screen version): screen ${screenArgs.join(' ')}`\n   167→          );\n   168→        }\n   169→      }\n   170→\n   171→      // Use spawnSync with array args (not execSync string) to avoid quoting issues (issue #25)\n   172→      const result = spawnSync('screen', screenArgs, {\n   173→        stdio: 'inherit',\n   174→      });\n   175→\n   176→      if (result.error) {\n   177→        throw result.error;\n   178→      }\n   179→\n   180→      // Helper to read log file output and write to stdout\n   181→      // Includes a short retry for the tee fallback path to handle the TOCTOU race\n   182→      // condition where the session appears gone but the log file isn't fully written yet\n   183→      // (issue #96)\n   184→      const readAndDisplayOutput = (retryCount = 0) => {\n   185→        let output = '';\n   186→        try {\n   187→          output = fs.readFileSync(logFile, 'utf8');\n   188→        } catch {\n   189→          // Log file might not exist if command produced no output\n   190→        }\n   191→\n   192→        // If output is empty and we haven't retried yet, wait briefly and retry once.\n   193→        // This handles the race where tee's write hasn't been flushed to disk yet\n   194→        // when the screen session appears done in `screen -ls` (issue #96).\n   195→        if (!output.trim() && retryCount === 0) {\n   196→          return new Promise((resolveRetry) => {\n   197→            setTimeout(() => {\n   198→              resolveRetry(readAndDisplayOutput(1));\n   199→            }, 50);\n   200→          });\n   201→        }\n   202→\n   203→        // Display the output\n   204→        if (output.trim()) {\n   205→          process.stdout.write(output);\n   206→          // Add trailing newline if output doesn't end with one\n   207→          if (!output.endsWith('\\n')) {\n   208→            process.stdout.write('\\n');\n   209→          }\n   210→        }\n   211→        return Promise.resolve(output);\n   212→      };\n   213→\n   214→      // Clean up temp files\n   215→      const cleanupTempFiles = () => {\n   216→        try {\n   217→          fs.unlinkSync(logFile);\n   218→        } catch {\n   219→          // Ignore cleanup errors\n   220→        }\n   221→        if (screenrcFile) {\n   222→          try {\n   223→            fs.unlinkSync(screenrcFile);\n   224→          } catch {\n   225→            // Ignore cleanup errors\n   226→          }\n   227→        }\n   228→      };\n   229→\n   230→      // Poll for session completion\n   231→      const checkInterval = 100; // ms\n   232→      const maxWait = 300000; // 5 minutes max\n   233→      let waited = 0;\n   234→\n   235→      const checkCompletion = () => {\n   236→        try {\n   237→          // Check if session still exists\n   238→          const sessions = execSync('screen -ls', {\n   239→            encoding: 'utf8',\n   240→            stdio: ['pipe', 'pipe', 'pipe'],\n   241→          });\n   242→\n   243→          if (!sessions.includes(sessionName)) {\n   244→            // Session ended, read output (with retry for tee path race condition)\n   245→            readAndDisplayOutput().then((output) => {\n   246→              cleanupTempFiles();\n   247→              resolve({\n   248→                success: true,\n   249→                sessionName,\n   250→                message: `Screen session \"${sessionName}\" exited with code 0`,\n   251→                exitCode: 0,\n   252→                output,\n   253→              });\n   254→            });\n   255→            return;\n   256→          }\n   257→\n   258→          waited += checkInterval;\n   259→          if (waited >= maxWait) {\n   260→            cleanupTempFiles();\n   261→            resolve({\n   262→              success: false,\n   263→              sessionName,\n   264→              message: `Screen session \"${sessionName}\" timed out after ${maxWait / 1000} seconds`,\n   265→              exitCode: 1,\n   266→            });\n   267→            return;\n   268→          }\n   269→\n   270→          setTimeout(checkCompletion, checkInterval);\n   271→        } catch {\n   272→          // screen -ls failed, session probably ended\n   273→          readAndDisplayOutput().then((output) => {\n   274→            cleanupTempFiles();\n   275→            resolve({\n   276→              success: true,\n   277→              sessionName,\n   278→              message: `Screen session \"${sessionName}\" exited with code 0`,\n   279→              exitCode: 0,\n   280→              output,\n   281→            });\n   282→          });\n   283→        }\n   284→      };\n   285→\n   286→      // Start checking after a brief delay\n   287→      setTimeout(checkCompletion, checkInterval);\n   288→    } catch (err) {\n   289→      resolve({\n   290→        success: false,\n   291→        sessionName,\n   292→        message: `Failed to run in screen: ${err.message}`,\n   293→      });\n   294→    }\n   295→  });\n   296→}\n   297→\n   298→/** Reset screen version cache (useful for testing) */\n   299→function resetScreenVersionCache() {\n   300→  cachedScreenVersion = null;\n   301→  screenVersionChecked = false;\n   302→}\n   303→\n   304→module.exports = {\n   305→  getScreenVersion,\n   306→  supportsLogfileOption,\n   307→  runScreenWithLogCapture,\n   308→  resetScreenVersionCache,\n   309→};\n   310→"
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Screen-specific isolation helpers extracted from isolation.rs\n     2→\n     3→use std::env;\n     4→use std::fs;\n     5→use std::process::{Command, Stdio};\n     6→use std::thread;\n     7→use std::time::Duration;\n     8→\n     9→use super::{get_shell, is_debug, wrap_command_with_user, IsolationResult};\n    10→\n    11→/// Get the installed screen version\n    12→pub fn get_screen_version() -> Option<(u32, u32, u32)> {\n    13→    let output = Command::new(\"screen\").arg(\"--version\").output().ok()?;\n    14→\n    15→    let output_str = String::from_utf8_lossy(&output.stdout);\n    16→    let stderr_str = String::from_utf8_lossy(&output.stderr);\n    17→    let combined = format!(\"{}{}\", output_str, stderr_str);\n    18→\n    19→    // Match patterns like \"4.09.01\", \"4.00.03\", \"4.5.1\"\n    20→    let re = regex::Regex::new(r\"(\\d+)\\.(\\d+)\\.(\\d+)\").ok()?;\n    21→    let caps = re.captures(&combined)?;\n    22→\n    23→    Some((\n    24→        caps.get(1)?.as_str().parse().ok()?,\n    25→        caps.get(2)?.as_str().parse().ok()?,\n    26→        caps.get(3)?.as_str().parse().ok()?,\n    27→    ))\n    28→}\n    29→\n    30→/// Check if screen supports the -Logfile option (added in 4.5.1)\n    31→pub fn supports_logfile_option() -> bool {\n    32→    match get_screen_version() {\n    33→        Some((major, minor, patch)) => {\n    34→            if major > 4 {\n    35→                return true;\n    36→            }\n    37→            if major < 4 {\n    38→                return false;\n    39→            }\n    40→            // major == 4\n    41→            if minor > 5 {\n    42→                return true;\n    43→            }\n    44→            if minor < 5 {\n    45→                return false;\n    46→            }\n    47→            // minor == 5\n    48→            patch >= 1\n    49→        }\n    50→        None => false,\n    51→    }\n    52→}\n    53→\n    54→/// Run screen with log capture (for attached mode without TTY)\n    55→pub fn run_screen_with_log_capture(\n    56→    command: &str,\n    57→    session_name: &str,\n    58→    user: Option<&str>,\n    59→) -> IsolationResult {\n    60→    let (shell, shell_arg) = get_shell();\n    61→    let log_file = env::temp_dir().join(format!(\"screen-output-{}.log\", session_name));\n    62→    let effective_command = wrap_command_with_user(command, user);\n    63→\n    64→    let use_native_logging = supports_logfile_option();\n    65→\n    66→    // Temporary screenrc file for native logging path (issue #96)\n    67→    // Setting logfile flush 0 forces screen to flush its log buffer after every write,\n    68→    // preventing output loss for quick-completing commands like `agent --version`.\n    69→    // Without this, screen buffers log writes and flushes every 10 seconds by default.\n    70→    let screenrc_file = if use_native_logging {\n    71→        let screenrc_path = env::temp_dir().join(format!(\"screenrc-{}\", session_name));\n    72→        match fs::write(&screenrc_path, \"logfile flush 0\\n\") {\n    73→            Ok(()) => Some(screenrc_path),\n    74→            Err(_) => None, // If we can't create the screenrc, proceed without it (best effort)\n    75→        }\n    76→    } else {\n    77→        None\n    78→    };\n    79→\n    80→    let screen_args: Vec<String> = if use_native_logging {\n    81→        // Use a temporary screenrc with `logfile flush 0` to force immediate log flushing\n    82→        // (issue #96: quick commands like `agent --version` lose output without this)\n    83→        let mut args = vec![\"-dmS\".to_string(), session_name.to_string()];\n    84→        if let Some(ref rc_path) = screenrc_file {\n    85→            args.push(\"-c\".to_string());\n    86→            args.push(rc_path.to_string_lossy().to_string());\n    87→        }\n    88→        args.extend([\n    89→            \"-L\".to_string(),\n    90→            \"-Logfile\".to_string(),\n    91→            log_file.to_string_lossy().to_string(),\n    92→            shell.clone(),\n    93→            shell_arg.clone(),\n    94→            effective_command.clone(),\n    95→        ]);\n    96→        args\n    97→    } else {\n    98→        // Use tee fallback for older screen versions\n    99→        let tee_command = format!(\n   100→            \"({}) 2>&1 | tee \\\"{}\\\"\",\n   101→            effective_command,\n   102→            log_file.display()\n   103→        );\n   104→        vec![\n   105→            \"-dmS\".to_string(),\n   106→            session_name.to_string(),\n   107→            shell.clone(),\n   108→            shell_arg.clone(),\n   109→            tee_command,\n   110→        ]\n   111→    };\n   112→\n   113→    if is_debug() {\n   114→        eprintln!(\"[DEBUG] Running: screen {:?}\", screen_args);\n   115→    }\n   116→\n   117→    let status = Command::new(\"screen\")\n   118→        .args(&screen_args)\n   119→        .stdout(Stdio::null())\n   120→        .stderr(Stdio::null())\n   121→        .status();\n   122→\n   123→    if status.is_err() {\n   124→        // Clean up screenrc temp file on error\n   125→        if let Some(ref rc_path) = screenrc_file {\n   126→            let _ = fs::remove_file(rc_path);\n   127→        }\n   128→        return IsolationResult {\n   129→            success: false,\n   130→            session_name: Some(session_name.to_string()),\n   131→            message: \"Failed to start screen session\".to_string(),\n   132→            ..Default::default()\n   133→        };\n   134→    }\n   135→\n   136→    // Helper to read log file with retry for the tee fallback TOCTOU race condition\n   137→    // (issue #96: session may appear done in `screen -ls` before tee finishes writing)\n   138→    let read_log_with_retry = |retry_count: u32| -> Option<String> {\n   139→        let content = fs::read_to_string(&log_file).ok();\n   140→        if retry_count == 0 {\n   141→            if let Some(ref s) = content {\n   142→                if s.trim().is_empty() {\n   143→                    // Brief wait then retry once for tee path race condition\n   144→                    thread::sleep(Duration::from_millis(50));\n   145→                    return fs::read_to_string(&log_file).ok();\n   146→                }\n   147→            }\n   148→        }\n   149→        content\n   150→    };\n   151→\n   152→    // Clean up temp files helper\n   153→    let cleanup = || {\n   154→        let _ = fs::remove_file(&log_file);\n   155→        if let Some(ref rc_path) = screenrc_file {\n   156→            let _ = fs::remove_file(rc_path);\n   157→        }\n   158→    };\n   159→\n   160→    // Poll for session completion\n   161→    let max_wait = Duration::from_secs(300);\n   162→    let check_interval = Duration::from_millis(100);\n   163→    let mut waited = Duration::ZERO;\n   164→\n   165→    loop {\n   166→        // Check if session still exists\n   167→        let sessions = Command::new(\"screen\")\n   168→            .arg(\"-ls\")\n   169→            .output()\n   170→            .map(|o| String::from_utf8_lossy(&o.stdout).to_string())\n   171→            .unwrap_or_default();\n   172→\n   173→        if !sessions.contains(session_name) {\n   174→            // Session ended, read output (with retry for tee path race condition)\n   175→            let output = read_log_with_retry(0);\n   176→\n   177→            // Display output\n   178→            if let Some(ref out) = output {\n   179→                if !out.trim().is_empty() {\n   180→                    print!(\"{}\", out);\n   181→                }\n   182→            }\n   183→\n   184→            // Clean up temp files\n   185→            cleanup();\n   186→\n   187→            return IsolationResult {\n   188→                success: true,\n   189→                session_name: Some(session_name.to_string()),\n   190→                container_id: None,\n   191→                message: format!(\"Screen session \\\"{}\\\" exited with code 0\", session_name),\n   192→                exit_code: Some(0),\n   193→                output,\n   194→            };\n   195→        }\n   196→\n   197→        thread::sleep(check_interval);\n   198→        waited += check_interval;\n   199→\n   200→        if waited >= max_wait {\n   201→            cleanup();\n   202→            return IsolationResult {\n   203→                success: false,\n   204→                session_name: Some(session_name.to_string()),\n   205→                message: format!(\n   206→                    \"Screen session \\\"{}\\\" timed out after {} seconds\",\n   207→                    session_name,\n   208→                    max_wait.as_secs()\n   209→                ),\n   210→                exit_code: Some(1),\n   211→                ..Default::default()\n   212→            };\n   213→        }\n   214→    }\n   215→}\n   216→"
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 [2026-03-14T13:27:46.127Z] [INFO] {
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 [2026-03-14T13:27:46.127Z] [INFO] {
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 [2026-03-14T13:27:46.139Z] [INFO] {
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      {
        "tool_use_id": "toolu_01LczWmh6yF4kazk58C49mhr",
        "type": "tool_result",
        "content": "     1→/** Isolation Runners for start-command (screen, tmux, docker, ssh) */\n     2→\n     3→const { execSync, spawn, spawnSync } = require('child_process');\n     4→const path = require('path');\n     5→const { generateSessionName } = require('./args-parser');\n     6→const outputBlocks = require('./output-blocks');\n     7→\n     8→// Debug mode from environment\n     9→const DEBUG =\n    10→  process.env.START_DEBUG === '1' || process.env.START_DEBUG === 'true';\n    11→\n    12→const {\n    13→  getScreenVersion,\n    14→  supportsLogfileOption,\n    15→  runScreenWithLogCapture: _runScreenWithLogCapture,\n    16→  resetScreenVersionCache,\n    17→} = require('./screen-isolation');\n    18→\n    19→/**\n    20→ * Check if a command is available on the system\n    21→ * @param {string} command - Command to check\n    22→ * @returns {boolean} True if command is available\n    23→ */\n    24→function isCommandAvailable(command) {\n    25→  try {\n    26→    const isWindows = process.platform === 'win32';\n    27→    const checkCmd = isWindows ? 'where' : 'which';\n    28→    execSync(`${checkCmd} ${command}`, { stdio: ['pipe', 'pipe', 'pipe'] });\n    29→    return true;\n    30→  } catch {\n    31→    return false;\n    32→  }\n    33→}\n    34→\n    35→/** Get the shell to use for command execution. */\n    36→function getShell() {\n    37→  const isWindows = process.platform === 'win32';\n    38→  const shell = isWindows ? 'cmd.exe' : process.env.SHELL || '/bin/sh';\n    39→  const shellArg = isWindows ? '/c' : '-c';\n    40→  return { shell, shellArg };\n    41→}\n    42→\n    43→/**\n    44→ * Detect the best available shell in an isolation environment (docker/ssh)\n    45→ * Tries shells in order: bash, zsh, sh\n    46→ * @param {'docker'|'ssh'} environment - Isolation environment type\n    47→ * @param {object} options - Options for the isolation environment\n    48→ * @param {string} [shellPreference='auto'] - Shell preference: 'auto', 'bash', 'zsh', 'sh'\n    49→ * @returns {string} Shell path to use\n    50→ */\n    51→function detectShellInEnvironment(\n    52→  environment,\n    53→  options,\n    54→  shellPreference = 'auto'\n    55→) {\n    56→  // If a specific shell is requested (not auto), use it directly\n    57→  if (shellPreference && shellPreference !== 'auto') {\n    58→    if (DEBUG) {\n    59→      console.log(`[DEBUG] Using forced shell: ${shellPreference}`);\n    60→    }\n    61→    return shellPreference;\n    62→  }\n    63→\n    64→  // In auto mode, try shells in order of preference\n    65→  const shellsToTry = ['bash', 'zsh', 'sh'];\n    66→\n    67→  if (environment === 'docker') {\n    68→    const image = options.image;\n    69→    if (!image) {\n    70→      return 'sh';\n    71→    }\n    72→\n    73→    for (const shell of shellsToTry) {\n    74→      try {\n    75→        const result = spawnSync(\n    76→          'docker',\n    77→          ['run', '--rm', image, 'sh', '-c', `command -v ${shell}`],\n    78→          { encoding: 'utf8', stdio: ['pipe', 'pipe', 'pipe'] }\n    79→        );\n    80→        if (result.status === 0 && result.stdout.trim()) {\n    81→          if (DEBUG) {\n    82→            console.log(\n    83→              `[DEBUG] Detected shell in docker image ${image}: ${result.stdout.trim()}`\n    84→            );\n    85→          }\n    86→          return result.stdout.trim();\n    87→        }\n    88→      } catch {\n    89→        // ignore; try next shell\n    90→      }\n    91→    }\n    92→\n    93→    if (DEBUG) {\n    94→      console.log(\n    95→        `[DEBUG] Could not detect shell in docker image ${image}, falling back to sh`\n    96→      );\n    97→    }\n    98→    return 'sh';\n    99→  }\n   100→"
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 [2026-03-14T13:27:46.152Z] [INFO]       messages: [Array],
 [2026-03-14T13:27:46.152Z] [INFO]       system: [Array],
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 [2026-03-14T13:27:46.153Z] [INFO]     timeout: 600000,
 [2026-03-14T13:27:46.153Z] [INFO]     signal: AbortSignal { aborted: false },
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 [2026-03-14T13:27:46.156Z] [INFO]     'x-stainless-lang': 'js',
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 [2026-03-14T13:27:46.797Z] [INFO] [log_8cbd64, request-id: "req_011CZ33tjCEL3bfWw3y4SP1o"] post https://api.anthropic.com/v1/messages?beta=true succeeded with status 200 in 647ms
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 [2026-03-14T13:27:46.802Z] [INFO] response 200 https://api.anthropic.com/v1/messages?beta=true Headers {
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Install it with: sudo apt-get install screen (Debian/Ubuntu) or brew install screen (macOS)',\n   197→    });\n   198→  }\n   199→\n   200→  const sessionName = options.session || generateSessionName('screen');\n   201→  const shellInfo = getShell();\n   202→  const { shell, shellArg } = shellInfo;\n   203→\n   204→  try {\n   205→    // Wrap command with user switch if specified\n   206→    let effectiveCommand = wrapCommandWithUser(command, options.user);\n   207→\n   208→    if (options.detached) {\n   209→      if (options.keepAlive) {\n   210→        effectiveCommand = `${effectiveCommand}; exec ${shell}`;\n   211→      }\n   212→\n   213→      const screenArgs = isInteractiveShellCommand(command)\n   214→        ? 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Install it with: sudo apt-get install tmux (Debian/Ubuntu) or brew install tmux (macOS)',\n   274→    });\n   275→  }\n   276→\n   277→  const sessionName = options.session || generateSessionName('tmux');\n   278→  const shellInfo = getShell();\n   279→  const { shell } = shellInfo;\n   280→\n   281→  // Wrap command with user switch if specified\n   282→  let effectiveCommand = wrapCommandWithUser(command, options.user);\n   283→\n   284→  try {\n   285→    if (options.detached) {\n   286→      if (options.keepAlive) {\n   287→        effectiveCommand = `${effectiveCommand}; exec ${shell}`;\n   288→      }\n   289→\n   290→      if (DEBUG) {\n   291→        console.log(\n   292→          `[DEBUG] Running: tmux new-session -d -s \"${sessionName}\" \"${effectiveCommand}\"`\n   293→        );\n   294→        console.log(`[DEBUG] keepAlive: ${options.keepAlive || false}`);\n   295→      }\n   296→\n   297→      execSync(\n   298→        `tmux new-session -d -s \"${sessionName}\" \"${effectiveCommand}\"`,\n   299→        {"
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        "content": "     1→//! Isolation Runners for start-command\n     2→//!\n     3→//! Provides execution of commands in various isolated environments:\n     4→//! - screen: GNU Screen terminal multiplexer\n     5→//! - tmux: tmux terminal multiplexer\n     6→//! - docker: Docker containers\n     7→//! - ssh: Remote SSH execution\n     8→\n     9→use std::env;\n    10→use std::process::{Command, Stdio};\n    11→\n    12→use crate::args_parser::generate_session_name;\n    13→\n    14→/// Result of an isolation run\n    15→#[derive(Debug, Default)]\n    16→pub struct IsolationResult {\n    17→    /// Whether the run succeeded\n    18→    pub success: bool,\n    19→    /// Session or container name\n    20→    pub session_name: Option<String>,\n    21→    /// Container ID (for docker)\n    22→    pub container_id: Option<String>,\n    23→    /// Message describing the result\n    24→    pub message: String,\n    25→    /// Exit code\n    26→    pub exit_code: Option<i32>,\n    27→    /// Captured output\n    28→    pub output: Option<String>,\n    29→}\n    30→\n    31→/// Options for isolation\n    32→#[derive(Debug, Clone)]\n    33→pub struct IsolationOptions {\n    34→    /// Session name\n    35→    pub session: Option<String>,\n    36→    /// Docker image\n    37→    pub image: Option<String>,\n    38→    /// SSH endpoint\n    39→    pub endpoint: Option<String>,\n    40→    /// Run in detached mode\n    41→    pub detached: bool,\n    42→    /// User to run command as\n    43→    pub user: Option<String>,\n    44→    /// Keep environment alive after command exits\n    45→    pub keep_alive: bool,\n    46→    /// Auto-remove docker container after exit\n    47→    pub auto_remove_docker_container: bool,\n    48→    /// Shell to use in isolation environments: auto, bash, zsh, sh\n    49→    pub shell: String,\n    50→}\n    51→\n    52→impl Default for IsolationOptions {\n    53→    fn default() -> Self {\n    54→        IsolationOptions {\n    55→            session: None,\n    56→            image: None,\n    57→            endpoint: None,\n    58→            detached: false,\n    59→            user: None,\n    60→            keep_alive: false,\n    61→            auto_remove_docker_container: false,\n    62→            shell: \"auto\".to_string(),\n    63→        }\n    64→    }\n    65→}\n    66→\n    67→/// Check if a command is available on the system\n    68→pub fn is_command_available(command: &str) -> bool {\n    69→    let check_cmd = if cfg!(windows) { \"where\" } else { \"which\" };\n    70→    Command::new(check_cmd)\n    71→        .arg(command)\n    72→        .stdout(Stdio::null())\n    73→        .stderr(Stdio::null())\n    74→        .status()\n    75→        .map(|s| s.success())\n    76→        .unwrap_or(false)\n    77→}\n    78→\n    79→/// Get the shell to use for command execution\n    80→pub fn get_shell() -> (String, String) {\n    81→    if cfg!(windows) {\n    82→        (\"cmd.exe\".to_string(), \"/c\".to_string())\n    83→    } else {\n    84→        let shell = env::var(\"SHELL\").unwrap_or_else(|_| \"/bin/sh\".to_string());\n    85→        (shell, \"-c\".to_string())\n    86→    }\n    87→}\n    88→\n    89→/// Check if the current process has a TTY attached\n    90→pub fn has_tty() -> bool {\n    91→    atty::is(atty::Stream::Stdin) && atty::is(atty::Stream::Stdout)\n    92→}\n    93→\n    94→/// Wrap command with sudo -u if user option is specified\n    95→pub fn wrap_command_with_user(command: &str, user: Option<&str>) -> String {\n    96→    match user {\n    97→        Some(u) => {\n    98→            // Escape single quotes in command\n    99→            let escaped = command.replace('\\'', \"'\\\\''\");\n   100→            format!(\"sudo -n -u {} sh -c '{}'\", u, escaped)\n   101→        }\n   102→        None => command.to_string(),\n   103→    }\n   104→}\n   105→\n   106→/// Shell names recognized as bare interactive shells (without -c flag).\n   107→/// Mirrors JS SHELL_NAMES constant in isolation.js.\n   108→const SHELL_NAMES: [&str; 8] = [\"bash\", \"zsh\", \"sh\", \"fish\", \"ksh\", \"csh\", \"tcsh\", \"dash\"];\n   109→\n   110→/// Returns true if command is a bare interactive shell invocation (no -c flag).\n   111→/// Used to avoid double-wrapping shells in isolation environments (issue #84).\n   112→///\n   113→/// Examples: \"bash\", \"zsh\", \"bash --norc\", \"/usr/local/bin/bash\"\n   114→/// Counter-examples: \"bash -c echo hi\", \"npm test\"\n   115→pub fn is_interactive_shell_command(command: &str) -> bool {\n   116→    let parts: Vec<&str> = command.split_whitespace().collect();\n   117→    if parts.is_empty() {\n   118→        return false;\n   119→    }\n   120→    let basename = parts[0].rsplit('/').next().unwrap_or(parts[0]);\n   121→    SHELL_NAMES.contains(&basename) && !parts.contains(&\"-c\")\n   122→}\n   123→\n   124→/// Returns true if command is a shell invocation that includes -c (e.g. `bash -i -c \"cmd\"`).\n   125→/// Used to pass such commands directly without double-wrapping (issue #91).\n   126→pub fn is_shell_invocation_with_args(command: &str) -> bool {\n   127→    let parts: Vec<&str> = command.split_whitespace().collect();\n   128→    if parts.is_empty() {\n   129→        return false;\n   130→    }\n   131→    let basename = parts[0].rsplit('/').next().unwrap_or(parts[0]);\n   132→    SHELL_NAMES.contains(&basename) && parts.contains(&\"-c\")\n   133→}\n   134→\n   135→/// Build argv for a shell-with-c command; 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      {
        "tool_use_id": "toolu_01XKxHowSbfgJGxR9SVmgajC",
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        "content": "     1→#!/usr/bin/env bun\n     2→/**\n     3→ * Experiment to test screen's tee fallback functionality\n     4→ * This simulates the behavior on macOS with older screen (< 4.5.1)\n     5→ * which doesn't support -Logfile option\n     6→ *\n     7→ * Issue #25: We don't get `Hello` output from `$ --isolated screen --verbose -- echo \"hello\"` command\n     8→ */\n     9→\n    10→const { execSync, spawnSync, spawn } = require('child_process');\n    11→const fs = require('fs');\n    12→const path = require('path');\n    13→const os = require('os');\n    14→\n    15→async function sleep(ms) {\n    16→  return new Promise((resolve) => setTimeout(resolve, ms));\n    17→}\n    18→\n    19→async function testTeeFallback() {\n    20→  console.log('=== Testing Screen Tee Fallback (macOS 4.0.3 simulation) ===\\n');\n    21→\n    22→  // Test environment info\n    23→  console.log('Environment:');\n    24→  console.log(`  Platform: ${process.platform}`);\n    25→  console.log(`  Node: ${process.version}`);\n    26→  try {\n    27→    const screenVersion = execSync('screen --version', {\n    28→      encoding: 'utf8',\n    29→    }).trim();\n    30→    console.log(`  Screen: ${screenVersion}`);\n    31→  } catch (e) {\n    32→    console.log(`  Screen: Not available - ${e.message}`);\n    33→    return;\n    34→  }\n    35→  console.log(\n    36→    `  TTY: stdin=${process.stdin.isTTY}, stdout=${process.stdout.isTTY}`\n    37→  );\n    38→  console.log('');\n    39→\n    40→  // Test 1: The tee fallback approach (current implementation for macOS)\n    41→  console.log('Test 1: Tee fallback approach (current implementation)');\n    42→  const sessionName1 = `tee-test-${Date.now()}`;\n    43→  const logFile1 = path.join(os.tmpdir(), `screen-tee-${sessionName1}.log`);\n    44→  const command = 'echo \"hello\"';\n    45→\n    46→  try {\n    47→    // This is the current implementation for older screen versions\n    48→    const effectiveCommand = `(${command}) 2>&1 | tee \"${logFile1}\"`;\n    49→    const shell = '/bin/sh';\n    50→    const shellArg = '-c';\n    51→    const screenArgs = [\n    52→      '-dmS',\n    53→      sessionName1,\n    54→      shell,\n    55→      shellArg,\n    56→      effectiveCommand,\n    57→    ];\n    58→\n    59→    console.log(`  Command: screen ${screenArgs.join(' ')}`);\n    60→    console.log(`  Effective command inside screen: ${effectiveCommand}`);\n    61→\n    62→    execSync(`screen ${screenArgs.map((a) => `\"${a}\"`).join(' ')}`, {\n    63→      stdio: 'inherit',\n    64→    });\n    65→\n    66→    // Wait for completion and poll for session\n    67→    let waited = 0;\n    68→    const maxWait = 5000;\n    69→    const interval = 100;\n    70→\n    71→    while (waited < maxWait) {\n    72→      await sleep(interval);\n    73→      waited += interval;\n    74→\n    75→      try {\n    76→        const sessions = execSync('screen -ls', {\n    77→          encoding: 'utf8',\n    78→          stdio: ['pipe', 'pipe', 'pipe'],\n    79→        });\n    80→        if (!sessions.includes(sessionName1)) {\n    81→          console.log(`  Session ended after ${waited}ms`);\n    82→          break;\n    83→        }\n    84→      } catch {\n    85→        // screen -ls returns non-zero if no sessions\n    86→        console.log(`  Session ended after ${waited}ms (no sessions)`);\n    87→        break;\n    88→      }\n    89→    }\n    90→\n    91→    // Check log file\n    92→    if (fs.existsSync(logFile1)) {\n    93→      const content = fs.readFileSync(logFile1, 'utf8');\n    94→      console.log(`  Log file exists: YES`);\n    95→      console.log(`  Log file size: ${content.length} bytes`);\n    96→      console.log(`  Log content: \"${content.trim()}\"`);\n    97→      console.log(\n    98→        `  Contains expected output: ${content.includes('hello') ? 'YES ✓' : 'NO ✗'}`\n    99→      );\n   100→      fs.unlinkSync(logFile1);\n   101→    } else {\n   102→      console.log(`  Log file exists: NO ✗`);\n   103→      console.log(`  Expected path: ${logFile1}`);\n   104→    }\n   105→\n   106→    // Cleanup\n   107→    try {\n   108→      execSync(`screen -S ${sessionName1} -X quit 2>/dev/null`);\n   109→    } catch {}\n   110→  } catch (e) {\n   111→    console.log(`  Error: ${e.message}`);\n   112→  }\n   113→  console.log('');\n   114→\n   115→  // Test 2: Test the attached mode WITHOUT TTY (hasTTY() returns false)\n   116→  console.log(\n   117→    'Test 2: Simulating attached mode without TTY (current code path)'\n   118→  );\n   119→  const sessionName2 = `tee-notty-${Date.now()}`;\n   120→  const logFile2 = path.join(os.tmpdir(), `screen-tee-${sessionName2}.log`);\n   121→\n   122→  try {\n   123→    // Simulate the runScreenWithLogCapture function behavior for older screen\n   124→    const command2 = 'echo \"hello from attached mode\"';\n   125→    const effectiveCommand2 = `(${command2}) 2>&1 | tee \"${logFile2}\"`;\n   126→    const shell = '/bin/sh';\n   127→    const shellArg = '-c';\n   128→    const screenArgs = [\n   129→      '-dmS',\n   130→      sessionName2,\n   131→      shell,\n   132→      shellArg,\n   133→      effectiveCommand2,\n   134→    ];\n   135→\n   136→    console.log(`  Screen args: ${screenArgs.join(' ')}`);\n   137→\n   138→    execSync(`screen ${screenArgs.map((a) => `\"${a}\"`).join(' ')}`, {\n   139→      stdio: 'inherit',\n   140→    });\n   141→\n   142→    // Poll for session completion (as done in current implementation)\n   143→    const checkInterval = 100;\n   144→    const maxWait = 5000;\n   145→    let waited = 0;\n   146→\n   147→    const checkCompletion = async () => {\n   148→      while (waited < maxWait) {\n   149→        await sleep(checkInterval);\n   150→        waited += checkInterval;\n   151→\n   152→        try {\n   153→          const sessions = execSync('screen -ls', {\n   154→            encoding: 'utf8',\n   155→            stdio: ['pipe', 'pipe', 'pipe'],\n   156→          });\n   157→          if (!sessions.includes(sessionName2)) {\n   158→            break;\n   159→          }\n   160→        } catch {\n   161→          break;\n   162→        }\n   163→      }\n   164→    };\n   165→\n   166→    await checkCompletion();\n   167→    console.log(`  Session ended after ${waited}ms`);\n   168→\n   169→    // Read output\n   170→    if (fs.existsSync(logFile2)) {\n   171→      const content = fs.readFileSync(logFile2, 'utf8');\n   172→      console.log(`  Log file exists: YES`);\n   173→      console.log(`  Log content: \"${content.trim()}\"`);\n   174→      console.log(\n   175→        `  Contains expected: ${content.includes('hello from attached mode') ? 'YES ✓' : 'NO ✗'}`\n   176→      );\n   177→      fs.unlinkSync(logFile2);\n   178→    } else {\n   179→      console.log(`  Log file exists: NO ✗`);\n   180→    }\n   181→\n   182→    try {\n   183→      execSync(`screen -S ${sessionName2} -X quit 2>/dev/null`);\n   184→    } catch {}\n   185→  } catch (e) {\n   186→    console.log(`  Error: ${e.message}`);\n   187→  }\n   188→  console.log('');\n   189→\n   190→  // Test 3: What happens if we have a TTY?\n   191→  console.log('Test 3: Test with attached mode WITH TTY (spawn with inherit)');\n   192→  const sessionName3 = `tty-test-${Date.now()}`;\n   193→\n   194→  try {\n   195→    const command3 = 'echo \"hello TTY\"';\n   196→    const screenArgs = ['-S', sessionName3, '/bin/sh', '-c', command3];\n   197→\n   198→    console.log(`  Screen args for attached mode: ${screenArgs.join(' ')}`);\n   199→    console.log(\n   200→      `  hasTTY: stdin=${process.stdin.isTTY}, stdout=${process.stdout.isTTY}`\n   201→    );\n   202→\n   203→    // This mimics what the current code does when hasTTY() returns true\n   204→    return new Promise((resolve) => {\n   205→      const child = spawn('screen', screenArgs, {\n   206→        stdio: 'inherit',\n   207→      });\n   208→\n   209→      child.on('exit', (code) => {\n   210→        console.log(`  Exit code: ${code}`);\n   211→        console.log(\n   212→          `  Note: In attached mode with TTY, output goes directly to terminal`\n   213→        );\n   214→        resolve();\n   215→      });\n   216→\n   217→      child.on('error', (err) => {\n   218→        console.log(`  Error: ${err.message}`);\n   219→        resolve();\n   220→      });\n   221→    });\n   222→  } catch (e) {\n   223→    console.log(`  Error: ${e.message}`);\n   224→  }\n   225→  console.log('');\n   226→\n   227→  console.log('=== Tests Complete ===');\n   228→}\n   229→\n   230→testTeeFallback();\n   231→"
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        "type": "tool_result",
        "content": "   100→  }\n   101→  console.log('');\n   102→\n   103→  // Test 2: Test with sleep to ensure buffer flush\n   104→  console.log('Test 2: With sleep for buffer flush');\n   105→  const sessionName2 = `logtest2-${Date.now()}`;\n   106→  const logFile2 = path.join(os.tmpdir(), `screen-log-${sessionName2}.log`);\n   107→\n   108→  try {\n   109→    const screenArgs = [\n   110→      '-dmS',\n   111→      sessionName2,\n   112→      '-L',\n   113→      '-Logfile',\n   114→      logFile2,\n   115→      '/bin/sh',\n   116→      '-c',\n   117→      'echo \"FLUSHED_OUTPUT\" && sleep 0.5',\n   118→    ];\n   119→\n   120→    console.log(`  Command: screen ${screenArgs.join(' ')}`);\n   121→\n   122→    execSync(`screen ${screenArgs.map((a) => `\"${a}\"`).join(' ')}`, {\n   123→      stdio: 'inherit',\n   124→    });\n   125→\n   126→    // Wait longer for flush (default is 10 seconds)\n   127→    await sleep(1500);\n   128→\n   129→    // Check log file\n   130→    if (fs.existsSync(logFile2)) {\n   131→      const content = fs.readFileSync(logFile2, 'utf8');\n   132→      console.log(`  Log file exists: YES`);\n   133→      console.log(`  Log file size: ${content.length} bytes`);\n   134→      console.log(\n   135→        `  Contains expected output: ${content.includes('FLUSHED_OUTPUT') ? 'YES ✓' : 'NO ✗'}`\n   136→      );\n   137→      fs.unlinkSync(logFile2);\n   138→    } else {\n   139→      console.log(`  Log file exists: NO ✗`);\n   140→    }\n   141→\n   142→    // Cleanup\n   143→    try {\n   144→      execSync(`screen -S ${sessionName2} -X quit 2>/dev/null`);\n   145→    } catch {}\n   146→  } catch (e) {\n   147→    console.log(`  Error: ${e.message}`);\n   148→  }\n   149→  console.log('');\n   150→\n   151→  // Test 3: Alternative - using hardstatus/output redirection\n   152→  console.log('Test 3: Direct command output capture (no screen logging)');\n   153→  const sessionName3 = `logtest3-${Date.now()}`;\n   154→  const logFile3 = path.join(os.tmpdir(), `screen-log-${sessionName3}.log`);\n   155→\n   156→  try {\n   157→    // Run command through screen but capture output to file within the command\n   158→    const command = `echo \"DIRECT_CAPTURE\" | tee ${logFile3}`;\n   159→    const screenArgs = ['-dmS', sessionName3, '/bin/sh', '-c', command];\n   160→\n   161→    console.log(`  Command: screen ${screenArgs.join(' ')}`);\n   162→\n   163→    execSync(`screen ${screenArgs.map((a) => `\"${a}\"`).join(' ')}`, {\n   164→      stdio: 'inherit',\n   165→    });\n   166→\n   167→    await sleep(500);\n   168→\n   169→    // Check log file\n   170→    if (fs.existsSync(logFile3)) {\n   171→      const content = fs.readFileSync(logFile3, 'utf8');\n   172→      console.log(`  Log file exists: YES`);\n   173→      console.log(\n   174→        `  Contains expected output: ${content.includes('DIRECT_CAPTURE') ? 'YES ✓' : 'NO ✗'}`\n   175→      );\n   176→      fs.unlinkSync(logFile3);\n   177→    } else {\n   178→      console.log(`  Log file exists: NO ✗`);\n   179→    }\n   180→\n   181→    // Cleanup\n   182→    try {\n   183→      execSync(`screen -S ${sessionName3} -X quit 2>/dev/null`);\n   184→    } catch {}\n   185→  } catch (e) {\n   186→    console.log(`  Error: ${e.message}`);\n   187→  }\n   188→  console.log('');\n   189→\n   190→  // Test 4: Script command approach\n   191→  console.log('Test 4: Using script command to capture output');\n   192→  const sessionName4 = `logtest4-${Date.now()}`;\n   193→  const logFile4 = path.join(os.tmpdir(), `script-log-${sessionName4}.log`);\n   194→\n   195→  try {\n   196→    // Use script to capture output\n   197→    const result = spawnSync(\n   198→      'script',\n   199→      [\n   200→        '-q',\n   201→        logFile4,\n   202→        '-c',\n   203→        `screen -dmS ${sessionName4} /bin/sh -c \"echo SCRIPT_CAPTURE\"`,\n   204→      ],\n   205→      {\n   206→        stdio: ['inherit', 'pipe', 'pipe'],\n   207→        timeout: 5000,\n   208→      }\n   209→    );\n   210→\n   211→    await sleep(500);\n   212→\n   213→    console.log(`  Exit code: ${result.status}`);\n   214→\n   215→    // Check log file\n   216→    if (fs.existsSync(logFile4)) {\n   217→      const content = fs.readFileSync(logFile4, 'utf8');\n   218→      console.log(`  Log file exists: YES`);\n   219→      console.log(`  Log file size: ${content.length} bytes`);\n   220→      fs.unlinkSync(logFile4);\n   221→    } else {\n   222→      console.log(`  Log file exists: NO`);\n   223→    }\n   224→\n   225→    // Cleanup\n   226→    try {\n   227→      execSync(`screen -S ${sessionName4} -X quit 2>/dev/null`);\n   228→    } catch {}\n   229→  } catch (e) {\n   230→    console.log(`  Error: ${e.message}`);\n   231→  }\n   232→  console.log('');\n   233→\n   234→  // Test 5: Test with -T option (terminal type)\n   235→  console.log('Test 5: With explicit terminal type -T xterm');\n   236→  const sessionName5 = `logtest5-${Date.now()}`;\n   237→  const logFile5 = path.join(os.tmpdir(), `screen-log-${sessionName5}.log`);\n   238→\n   239→  try {\n   240→    const screenArgs = [\n   241→      '-T',\n   242→      'xterm',\n   243→      '-dmS',\n   244→      sessionName5,\n   245→      '-L',\n   246→      '-Logfile',\n   247→      logFile5,\n   248→      '/bin/sh',\n   249→      '-c',"
      }
    ]
  },
  "parent_tool_use_id": "toolu_01XpsFt8saNQfdFWzEF1zz2D",
  "session_id": "914de587-6218-4c93-b322-d791963b9891",
  "uuid": "0b405ab3-f86f-4563-9851-bbdfd57df402"
 }
 [2026-03-14T13:28:06.424Z] [INFO] {
  "type": "system",
  "subtype": "task_progress",
  "task_id": "ac2b4d6a86f18bc0f",
  "tool_use_id": "toolu_01XpsFt8saNQfdFWzEF1zz2D",
  "description": "Reading rust/src/lib/isolation.rs",
  "usage": {
    "total_tokens": 46796,
    "tool_uses": 27,
    "duration_ms": 27873
  },
  "last_tool_name": "Read",
  "uuid": "f9305fe6-72f4-4830-9d92-bdec8b937ebb",
  "session_id": "914de587-6218-4c93-b322-d791963b9891"
 }
 [2026-03-14T13:28:06.425Z] [INFO] {
  "type": "assistant",
  "message": {
    "model": "claude-haiku-4-5-20251001",
    "id": "msg_01Nv3WtxdgiLwmFZP2cPo3sS",
    "type": "message",
    "role": "assistant",
    "content": [
      {
        "type": "tool_use",
        "id": "toolu_01PmyWFY34EbBeDuRFXC3XSo",
        "name": "Read",
        "input": {
          "file_path": "/tmp/gh-issue-solver-1773494815317/rust/src/lib/isolation.rs",
          "limit": 200,
          "offset": 150
        },
        "caller": {
          "type": "direct"
        }
      }
    ],
    "stop_reason": null,
    "stop_sequence": null,
    "usage": {
      "input_tokens": 5,
      "cache_creation_input_tokens": 4392,
      "cache_read_input_tokens": 42298,
      "cache_creation": {
        "ephemeral_5m_input_tokens": 4392,
        "ephemeral_1h_input_tokens": 0
      },
      "output_tokens": 3,
      "service_tier": "standard",
      "inference_geo": "not_available"
    },
    "context_management": null
  },
  "parent_tool_use_id": "toolu_01XpsFt8saNQfdFWzEF1zz2D",
  "session_id": "914de587-6218-4c93-b322-d791963b9891",
  "uuid": "300a712b-f600-4656-954a-f2ea9fccbc36"
 }
 [2026-03-14T13:28:06.436Z] [INFO] {
  "type": "user",
  "message": {
    "role": "user",
    "content": [
      {
        "tool_use_id": "toolu_01PmyWFY34EbBeDuRFXC3XSo",
        "type": "tool_result",
        "content": "   150→        }\n   151→    }\n   152→}\n   153→\n   154→/// Returns \"-i\" for bash/zsh (interactive mode, sources startup files), None for other shells.\n   155→fn get_shell_interactive_flag(shell_path: &str) -> Option<&'static str> {\n   156→    let shell_name = shell_path.rsplit('/').next().unwrap_or(shell_path);\n   157→    match shell_name {\n   158→        \"bash\" => Some(\"-i\"),\n   159→        \"zsh\" => Some(\"-i\"),\n   160→        _ => None,\n   161→    }\n   162→}\n   163→\n   164→/// Detect the best available shell in an isolation environment (docker/ssh)\n   165→/// Tries shells in order: bash, zsh, sh\n   166→/// Returns the shell path to use\n   167→pub fn detect_shell_in_environment(environment: &str, options: &IsolationOptions) -> String {\n   168→    let shell_preference = &options.shell;\n   169→\n   170→    // If a specific shell is requested (not auto), use it directly\n   171→    if !shell_preference.is_empty() && shell_preference != \"auto\" {\n   172→        if is_debug() {\n   173→            eprintln!(\"[DEBUG] Using forced shell: {}\", shell_preference);\n   174→        }\n   175→        return shell_preference.clone();\n   176→    }\n   177→\n   178→    // In auto mode, try shells in order of preference\n   179→    let shells_to_try = [\"bash\", \"zsh\", \"sh\"];\n   180→\n   181→    if environment == \"docker\" {\n   182→        let image = match &options.image {\n   183→            Some(i) => i.clone(),\n   184→            None => return \"sh\".to_string(),\n   185→        };\n   186→\n   187→        for shell in &shells_to_try {\n   188→            let result = Command::new(\"docker\")\n   189→                .args([\n   190→                    \"run\",\n   191→                    \"--rm\",\n   192→                    &image,\n   193→                    \"sh\",\n   194→                    \"-c\",\n   195→                    &format!(\"command -v {}\", shell),\n   196→                ])\n   197→                .stdout(Stdio::piped())\n   198→                .stderr(Stdio::null())\n   199→                .output();\n   200→\n   201→            if let Ok(output) = result {\n   202→                if output.status.success() {\n   203→                    let detected = String::from_utf8_lossy(&output.stdout).trim().to_string();\n   204→                    if !detected.is_empty() {\n   205→                        if is_debug() {\n   206→                            eprintln!(\n   207→                                \"[DEBUG] Detected shell in docker image {}: {}\",\n   208→                                image, detected\n   209→                            );\n   210→                        }\n   211→                        return detected;\n   212→                    }\n   213→                }\n   214→            }\n   215→        }\n   216→\n   217→        if is_debug() {\n   218→            eprintln!(\n   219→                \"[DEBUG] Could not detect shell in docker image {}, falling back to sh\",\n   220→                image\n   221→            );\n   222→        }\n   223→        return \"sh\".to_string();\n   224→    }\n   225→\n   226→    if environment == \"ssh\" {\n   227→        let endpoint = match &options.endpoint {\n   228→            Some(e) => e.clone(),\n   229→            None => return \"sh\".to_string(),\n   230→        };\n   231→\n   232→        // Run a single SSH command to check for available shells in order\n   233→        let check_cmd: Vec<String> = shells_to_try\n   234→            .iter()\n   235→            .map(|s| format!(\"command -v {}\", s))\n   236→            .collect();\n   237→        let check_cmd_str = check_cmd.join(\" || \");\n   238→\n   239→        let result = Command::new(\"ssh\")\n   240→            .args([&endpoint, &check_cmd_str])\n   241→            .stdout(Stdio::piped())\n   242→            .stderr(Stdio::null())\n   243→            .output();\n   244→\n   245→        if let Ok(output) = result {\n   246→            if output.status.success() {\n   247→                let detected = String::from_utf8_lossy(&output.stdout).trim().to_string();\n   248→                if !detected.is_empty() {\n   249→                    if is_debug() {\n   250→                        eprintln!(\n   251→                            \"[DEBUG] Detected shell on SSH host {}: {}\",\n   252→                            endpoint, detected\n   253→                        );\n   254→                    }\n   255→                    return detected;\n   256→                }\n   257→            }\n   258→        }\n   259→\n   260→        if is_debug() {\n   261→            eprintln!(\n   262→                \"[DEBUG] Could not detect shell on SSH host {}, falling back to sh\",\n   263→                endpoint\n   264→            );\n   265→        }\n   266→        return \"sh\".to_string();\n   267→    }\n   268→\n   269→    \"sh\".to_string()\n   270→}\n   271→\n   272→#[path = \"isolation_screen.rs\"]\n   273→pub mod isolation_screen;\n   274→pub use self::isolation_screen::{get_screen_version, supports_logfile_option};\n   275→\n   276→/// Run command in GNU Screen\n   277→pub fn run_in_screen(command: &str, options: &IsolationOptions) -> IsolationResult {\n   278→    if !is_command_available(\"screen\") {\n   279→        return IsolationResult {\n   280→            success: false,\n   281→            message: \"screen is not installed. Install it with: sudo apt-get install screen (Debian/Ubuntu) or brew install screen (macOS)\".to_string(),\n   282→            ..Default::default()\n   283→        };\n   284→    }\n   285→\n   286→    let session_name = options\n   287→        .session\n   288→        .clone()\n   289→        .unwrap_or_else(|| generate_session_name(Some(\"screen\")));\n   290→\n   291→    let (shell, shell_arg) = get_shell();\n   292→    let effective_command = wrap_command_with_user(command, options.user.as_deref());\n   293→\n   294→    if options.detached {\n   295→        // Detached mode\n   296→        let final_command = if options.keep_alive {\n   297→            format!(\"{}; exec {}\", effective_command, shell)\n   298→        } else {\n   299→            effective_command.clone()\n   300→        };\n   301→\n   302→        let status = Command::new(\"screen\")\n   303→            .args([\"-dmS\", &session_name, &shell, &shell_arg, &final_command])\n   304→            .status();\n   305→\n   306→        match status {\n   307→            Ok(s) if s.success() => {\n   308→                let mut message = format!(\n   309→                    \"Command started in detached screen session: {}\",\n   310→                    session_name\n   311→                );\n   312→                if options.keep_alive {\n   313→                    message.push_str(\"\\nSession will stay alive after command completes.\");\n   314→                } else {\n   315→                    message.push_str(\"\\nSession will exit automatically after command completes.\");\n   316→                }\n   317→                message.push_str(&format!(\"\\nReattach with: screen -r {}\", session_name));\n   318→\n   319→                IsolationResult {\n   320→                    success: true,\n   321→                    session_name: Some(session_name),\n   322→                    message,\n   323→                    ..Default::default()\n   324→                }\n   325→            }\n   326→            _ => IsolationResult {\n   327→                success: false,\n   328→                session_name: Some(session_name),\n   329→                message: \"Failed to start screen session\".to_string(),\n   330→                ..Default::default()\n   331→            },\n   332→        }\n   333→    } else {\n   334→        // Attached mode with log capture\n   335→        isolation_screen::run_screen_with_log_capture(\n   336→            command,\n   337→            &session_name,\n   338→            options.user.as_deref(),\n   339→        )\n   340→    }\n   341→}\n   342→\n   343→/// Run command in tmux\n   344→pub fn run_in_tmux(command: &str, options: &IsolationOptions) -> IsolationResult {\n   345→    if !is_command_available(\"tmux\") {\n   346→        return IsolationResult {\n   347→            success: false,\n   348→            message: \"tmux is not installed. Install it with: sudo apt-get install tmux (Debian/Ubuntu) or brew install tmux (macOS)\".to_string(),\n   349→            ..Default::default()"
      }
    ]
  },
  "parent_tool_use_id": "toolu_01XpsFt8saNQfdFWzEF1zz2D",
  "session_id": "914de587-6218-4c93-b322-d791963b9891",
  "uuid": "4255dbda-488c-4d98-9d61-b343726ab27c"
 }
 [2026-03-14T13:28:06.444Z] [INFO] [log_ab5784] sending request {
 [2026-03-14T13:28:06.444Z] [INFO]   method: 'post',
 [2026-03-14T13:28:06.445Z] [INFO]   url: 'https://api.anthropic.com/v1/messages?beta=true',
 [2026-03-14T13:28:06.445Z] [INFO]   options: {
 [2026-03-14T13:28:06.445Z] [INFO]     method: 'post',
 [2026-03-14T13:28:06.445Z] [INFO]     path: '/v1/messages?beta=true',
 [2026-03-14T13:28:06.445Z] [INFO]     body: {
 [2026-03-14T13:28:06.446Z] [INFO]       model: 'claude-haiku-4-5-20251001',
 [2026-03-14T13:28:06.446Z] [INFO]       messages: [Array],
 [2026-03-14T13:28:06.446Z] [INFO]       system: [Array],
 [2026-03-14T13:28:06.446Z] [INFO]       tools: [Array],
 [2026-03-14T13:28:06.446Z] [INFO]       tool_choice: undefined,
 [2026-03-14T13:28:06.446Z] [INFO]       metadata: [Object],
 [2026-03-14T13:28:06.446Z] [INFO]       max_tokens: 64000,
 [2026-03-14T13:28:06.447Z] [INFO]       thinking: undefined,
 [2026-03-14T13:28:06.447Z] [INFO]       temperature: 1,
 [2026-03-14T13:28:06.447Z] [INFO]       stream: true
 [2026-03-14T13:28:06.447Z] [INFO]     },
 [2026-03-14T13:28:06.447Z] [INFO]     timeout: 600000,
 [2026-03-14T13:28:06.447Z] [INFO]     signal: AbortSignal { aborted: false },
 [2026-03-14T13:28:06.447Z] [INFO]     stream: true
 [2026-03-14T13:28:06.448Z] [INFO]   },
 [2026-03-14T13:28:06.448Z] [INFO]   headers: {
 [2026-03-14T13:28:06.448Z] [INFO]     accept: 'application/json',
 [2026-03-14T13:28:06.448Z] [INFO]     'anthropic-beta': 'oauth-2025-04-20,interleaved-thinking-2025-05-14,context-management-2025-06-27,prompt-caching-scope-2026-01-05,claude-code-20250219',
 [2026-03-14T13:28:06.448Z] [INFO]     'anthropic-dangerous-direct-browser-access': 'true',
 [2026-03-14T13:28:06.448Z] [INFO]     'anthropic-version': '2023-06-01',
 [2026-03-14T13:28:06.448Z] [INFO]     authorization: '***',
 [2026-03-14T13:28:06.448Z] [INFO]     'content-type': 'application/json',
 [2026-03-14T13:28:06.449Z] [INFO]     'user-agent': 'claude-cli/2.1.73 (external, sdk-cli)',
 [2026-03-14T13:28:06.449Z] [INFO]     'x-app': 'cli',
 [2026-03-14T13:28:06.449Z] [INFO]     'x-stainless-arch': 'x64',
 [2026-03-14T13:28:06.449Z] [INFO]     'x-stainless-lang': 'js',
 [2026-03-14T13:28:06.449Z] [INFO]     'x-stainless-os': 'Linux',
 [2026-03-14T13:28:06.449Z] [INFO]     'x-stainless-package-version': '0.74.0',
 [2026-03-14T13:28:06.449Z] [INFO]     'x-stainless-retry-count': '0',
 [2026-03-14T13:28:06.450Z] [INFO]     'x-stainless-runtime': 'node',
 [2026-03-14T13:28:06.450Z] [INFO]     'x-stainless-runtime-version': 'v20.20.1',
 [2026-03-14T13:28:06.450Z] [INFO]     'x-stainless-timeout': '600'
 [2026-03-14T13:28:06.450Z] [INFO]   }
 [2026-03-14T13:28:06.450Z] [INFO] }
 [2026-03-14T13:28:07.689Z] [INFO] [log_ab5784, request-id: "req_011CZ33vDy85t12sebm6x19C"] post https://api.anthropic.com/v1/messages?beta=true succeeded with status 200 in 1246ms
 [2026-03-14T13:28:07.690Z] [INFO] [log_ab5784] response start {
 [2026-03-14T13:28:07.690Z] [INFO]   url: 'https://api.anthropic.com/v1/messages?beta=true',
 [2026-03-14T13:28:07.691Z] [INFO]   status: 200,
 [2026-03-14T13:28:07.691Z] [INFO]   headers: {
 [2026-03-14T13:28:07.691Z] [INFO]     'anthropic-organization-id': '684cb0ba-85b8-4b30-a841-e92fb92cc97f',
 [2026-03-14T13:28:07.691Z] [INFO]     'anthropic-ratelimit-unified-5h-reset': '1773504000',
 [2026-03-14T13:28:07.691Z] [INFO]     'anthropic-ratelimit-unified-5h-status': 'allowed',
 [2026-03-14T13:28:07.691Z] [INFO]     'anthropic-ratelimit-unified-5h-utilization': '0.25',
 [2026-03-14T13:28:07.692Z] [INFO]     'anthropic-ratelimit-unified-7d-reset': '1773979200',
 [2026-03-14T13:28:07.692Z] [INFO]     'anthropic-ratelimit-unified-7d-status': 'allowed',
 [2026-03-14T13:28:07.692Z] [INFO]     'anthropic-ratelimit-unified-7d-utilization': '0.23',
 [2026-03-14T13:28:07.692Z] [INFO]     'anthropic-ratelimit-unified-fallback-percentage': '0.5',
 [2026-03-14T13:28:07.692Z] [INFO]     'anthropic-ratelimit-unified-overage-disabled-reason': 'org_level_disabled',
 [2026-03-14T13:28:07.692Z] [INFO]     'anthropic-ratelimit-unified-overage-status': 'rejected',
 [2026-03-14T13:28:07.692Z] [INFO]     'anthropic-ratelimit-unified-representative-claim': 'five_hour',
 [2026-03-14T13:28:07.692Z] [INFO]     'anthropic-ratelimit-unified-reset': '1773504000',
 [2026-03-14T13:28:07.693Z] [INFO]     'anthropic-ratelimit-unified-status': 'allowed',
 [2026-03-14T13:28:07.693Z] [INFO]     'cache-control': 'no-cache',
 [2026-03-14T13:28:07.693Z] [INFO]     'cf-cache-status': 'DYNAMIC',
 [2026-03-14T13:28:07.693Z] [INFO]     'cf-ray': '9dc39ea058a237de-FRA',
 [2026-03-14T13:28:07.693Z] [INFO]     connection: 'keep-alive',
 [2026-03-14T13:28:07.693Z] [INFO]     'content-encoding': 'gzip',
 [2026-03-14T13:28:07.693Z] [INFO]     'content-security-policy': "default-src 'none'; frame-ancestors 'none'",
 [2026-03-14T13:28:07.693Z] [INFO]     'content-type': 'text/event-stream; charset=utf-8',
 [2026-03-14T13:28:07.694Z] [INFO]     date: 'Sat, 14 Mar 2026 13:28:07 GMT',
 [2026-03-14T13:28:07.694Z] [INFO]     'request-id': 'req_011CZ33vDy85t12sebm6x19C',
 [2026-03-14T13:28:07.694Z] [INFO]     server: 'cloudflare',
 [2026-03-14T13:28:07.694Z] [INFO]     'server-timing': 'proxy;dur=1121',
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End timestamp\n    62→ * @param {number} exitCode - Exit code\n    63→ * @returns {string} Log footer content\n    64→ */\n    65→function createLogFooter(endTime, exitCode) {\n    66→  let content = `\\n${'='.repeat(50)}\\n`;\n    67→  content += `Finished: ${endTime}\\n`;\n    68→  content += `Exit Code: ${exitCode}\\n`;\n    69→  return content;\n    70→}\n    71→\n    72→/**\n    73→ * Write log file\n    74→ * @param {string} logPath - Path to log file\n    75→ * @param {string} content - Log content\n    76→ * @returns {boolean} Success status\n    77→ */\n    78→function writeLogFile(logPath, content) {\n    79→  try {\n    80→    fs.writeFileSync(logPath, content, 'utf8');\n    81→    return true;\n    82→  } catch (err) {\n    83→    console.error(`\\nWarning: Could not save log file: ${err.message}`);\n    84→    return false;\n    85→  }\n    86→}\n    87→\n    88→/**\n    89→ * Get log directory from environment or use system temp\n    90→ * @returns {string} Log directory path\n    91→ */\n    92→function getLogDir() {\n    93→  return process.env.START_LOG_DIR || os.tmpdir();\n    94→}\n    95→\n    96→/**\n    97→ * Create log file path\n    98→ * @param {string} environment - 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        "content": "     1→//! Logging and utility functions for isolation runners\n     2→\n     3→use std::env;\n     4→use std::fs::File;\n     5→use std::io::Write;\n     6→use std::path::PathBuf;\n     7→\n     8→/// Generate timestamp for logging\n     9→pub fn get_timestamp() -> String {\n    10→    chrono::Utc::now()\n    11→        .format(\"%Y-%m-%d %H:%M:%S%.3f\")\n    12→        .to_string()\n    13→}\n    14→\n    15→/// Generate unique log filename\n    16→pub fn generate_log_filename(environment: &str) -> String {\n    17→    let timestamp = std::time::SystemTime::now()\n    18→        .duration_since(std::time::UNIX_EPOCH)\n    19→        .unwrap()\n    20→        .as_millis();\n    21→    let random: String = (0..6)\n    22→        .map(|_| {\n    23→            let idx = (std::time::SystemTime::now()\n    24→                .duration_since(std::time::UNIX_EPOCH)\n    25→                .unwrap()\n    26→                .as_nanos()\n    27→                % 36) as u8;\n    28→            if idx < 10 {\n    29→                (b'0' + idx) as char\n    30→            } else {\n    31→                (b'a' + idx - 10) as char\n    32→            }\n    33→        })\n    34→        .collect();\n    35→    format!(\"start-command-{}-{}-{}.log\", environment, timestamp, random)\n    36→}\n    37→\n    38→/// Log header parameters\n    39→#[derive(Debug)]\n    40→pub struct LogHeaderParams {\n    41→    pub command: String,\n    42→    pub environment: String,\n    43→    pub mode: String,\n    44→    pub session_name: String,\n    45→    pub image: Option<String>,\n    46→    pub user: Option<String>,\n    47→    pub start_time: String,\n    48→}\n    49→\n    50→/// Create log content header\n    51→pub fn create_log_header(params: &LogHeaderParams) -> String {\n    52→    let mut content = String::new();\n    53→    content.push_str(\"=== Start Command Log ===\\n\");\n    54→    content.push_str(&format!(\"Timestamp: {}\\n\", params.start_time));\n    55→    content.push_str(&format!(\"Command: {}\\n\", params.command));\n    56→    content.push_str(&format!(\"Environment: {}\\n\", params.environment));\n    57→    content.push_str(&format!(\"Mode: {}\\n\", params.mode));\n    58→    content.push_str(&format!(\"Session: {}\\n\", params.session_name));\n    59→    if let Some(ref image) = params.image {\n    60→        content.push_str(&format!(\"Image: {}\\n\", image));\n    61→    }\n    62→    if let Some(ref user) = params.user {\n    63→        content.push_str(&format!(\"User: {}\\n\", user));\n    64→    }\n    65→    content.push_str(&format!(\"Platform: {}\\n\", std::env::consts::OS));\n    66→    content.push_str(&format!(\n    67→        \"Working Directory: {}\\n\",\n    68→        env::current_dir().unwrap_or_default().display()\n    69→    ));\n    70→    content.push_str(&format!(\"{}\\n\\n\", \"=\".repeat(50)));\n    71→    content\n    72→}\n    73→\n    74→/// Create log content footer\n    75→pub fn create_log_footer(end_time: &str, exit_code: i32) -> String {\n    76→    let mut content = String::new();\n    77→    content.push_str(&format!(\"\\n{}\\n\", \"=\".repeat(50)));\n    78→    content.push_str(&format!(\"Finished: {}\\n\", end_time));\n    79→    content.push_str(&format!(\"Exit Code: {}\\n\", exit_code));\n    80→    content\n    81→}\n    82→\n    83→/// Write log file\n    84→pub fn write_log_file(log_path: &PathBuf, content: &str) -> bool {\n    85→    match File::create(log_path) {\n    86→        Ok(mut file) => file.write_all(content.as_bytes()).is_ok(),\n    87→        Err(e) => {\n    88→            eprintln!(\"\\nWarning: Could not save log file: {}\", e);\n    89→            false\n    90→        }\n    91→    }\n    92→}\n    93→\n    94→/// Get log directory from environment or use system temp\n    95→pub fn get_log_dir() -> PathBuf {\n    96→    env::var(\"START_LOG_DIR\")\n    97→        .map(PathBuf::from)\n    98→        .unwrap_or_else(|_| env::temp_dir())\n    99→}\n   100→\n   101→/// Create log file path\n   102→pub fn create_log_path(environment: &str) -> PathBuf {\n   103→    let log_dir = get_log_dir();\n   104→    let log_filename = generate_log_filename(environment);\n   105→    log_dir.join(log_filename)\n   106→}\n   107→\n   108→/// Get the default Docker image based on the host operating system\n   109→/// Returns an image that matches the current OS as closely as possible:\n   110→/// - macOS: Uses alpine (since macOS cannot run in Docker)\n   111→/// - Ubuntu/Debian: Uses ubuntu:latest\n   112→/// - Arch Linux: Uses archlinux:latest\n   113→/// - Other Linux: Uses the detected distro or alpine as fallback\n   114→/// - Windows: Uses alpine (Windows containers have limited support)\n   115→pub fn get_default_docker_image() -> String {\n   116→    #[cfg(target_os = \"macos\")]\n   117→    {\n   118→        // macOS cannot run in Docker containers, use alpine as lightweight alternative\n   119→        return \"alpine:latest\".to_string();\n   120→    }\n   121→\n   122→    #[cfg(target_os = \"windows\")]\n   123→    {\n   124→        // Windows containers have limited support, use alpine for Linux containers\n   125→        return \"alpine:latest\".to_string();\n   126→    }\n   127→\n   128→    #[cfg(target_os = \"linux\")]\n   129→    {\n   130→        use std::fs;\n   131→        // Try to detect the Linux distribution\n   132→        if let Ok(os_release) = fs::read_to_string(\"/etc/os-release\") {\n   133→            // Check for Ubuntu\n   134→            if os_release.contains(\"ID=ubuntu\")\n   135→                || os_release.contains(\"ID_LIKE=ubuntu\")\n   136→                || os_release.contains(\"ID_LIKE=debian ubuntu\")\n   137→            {\n   138→                return \"ubuntu:latest\".to_string();\n   139→            }\n   140→\n   141→            // Check for Debian\n   142→            if os_release.contains(\"ID=debian\") || os_release.contains(\"ID_LIKE=debian\") {\n   143→                return \"debian:latest\".to_string();\n   144→            }\n   145→\n   146→            // Check for Arch Linux\n   147→            if os_release.contains(\"ID=arch\") || os_release.contains(\"ID_LIKE=arch\") {\n   148→                return \"archlinux:latest\".to_string();\n   149→            }\n   150→\n   151→            // Check for Fedora\n   152→            if os_release.contains(\"ID=fedora\") {\n   153→                return \"fedora:latest\".to_string();\n   154→            }\n   155→\n   156→            // Check for CentOS/RHEL\n   157→            if os_release.contains(\"ID=centos\")\n   158→                || os_release.contains(\"ID=rhel\")\n   159→                || os_release.contains(\"ID_LIKE=rhel\")\n   160→            {\n   161→                return \"centos:latest\".to_string();\n   162→            }\n   163→\n   164→            // Check for Alpine\n   165→            if os_release.contains(\"ID=alpine\") {\n   166→                return \"alpine:latest\".to_string();\n   167→            }\n   168→        }\n   169→\n   170→        // Default fallback: use alpine as a lightweight, universal option\n   171→        \"alpine:latest\".to_string()\n   172→    }\n   173→\n   174→    // Fallback for other platforms\n   175→    #[cfg(not(any(target_os = \"macos\", target_os = \"windows\", target_os = \"linux\")))]\n   176→    {\n   177→        \"alpine:latest\".to_string()\n   178→    }\n   179→}\n   180→"
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        "content": "   100→    options.isolated = backends[0]; // Current level\n   101→  } else {\n   102→    // Single value (backward compatible)\n   103→    const backend = value.toLowerCase();\n   104→    options.isolated = backend;\n   105→    options.isolatedStack = [backend];\n   106→  }\n   107→}\n   108→\n   109→/**\n   110→ * Parse --image value, handling both single values and sequences\n   111→ * @param {string} value - Image value (e.g., \"ubuntu:22.04\" or \"_ _ ubuntu:22.04\")\n   112→ * @param {object} options - Options object to populate\n   113→ */\n   114→function parseImageValue(value, options) {\n   115→  if (isSequence(value)) {\n   116→    // Multi-value sequence with placeholders\n   117→    const images = parseSequence(value);\n   118→    options.imageStack = images;\n   119→    options.image = images[0]; // Current level\n   120→  } else {\n   121→    // Single value - will be distributed later during validation\n   122→    options.image = value;\n   123→    options.imageStack = null; // Will be populated during validation\n   124→  }\n   125→}\n   126→\n   127→/**\n   128→ * Parse --endpoint value, handling both single values and sequences\n   129→ * @param {string} value - Endpoint value (e.g., \"user@host\" or \"_ user@host1 _ user@host2\")\n   130→ * @param {object} options - Options object to populate\n   131→ */\n   132→function parseEndpointValue(value, options) {\n   133→  if (isSequence(value)) {\n   134→    // Multi-value sequence with placeholders\n   135→    const endpoints = parseSequence(value);\n   136→    options.endpointStack = endpoints;\n   137→    options.endpoint = endpoints[0]; // Current level\n   138→  } else {\n   139→    // Single value - will be distributed later during validation\n   140→    options.endpoint = value;\n   141→    options.endpointStack = null; // Will be populated during validation\n   142→  }\n   143→}\n   144→\n   145→/**\n   146→ * Parse command line arguments into wrapper options and command\n   147→ * @param {string[]} args - Array of command line arguments\n   148→ * @returns {{wrapperOptions: object, command: string, rawCommand: string[]}}\n   149→ */\n   150→function parseArgs(args) {\n   151→  const wrapperOptions = {\n   152→    isolated: null, // Isolation environment: screen, tmux, docker, ssh (current level)\n   153→    isolatedStack: null, // Full isolation stack for multi-level isolation (e.g., [\"screen\", \"ssh\", \"docker\"])\n   154→    attached: false, // Run in attached mode\n   155→    detached: false, // Run in detached mode\n   156→    session: null, // Session name (current level)\n   157→    sessionStack: null, // Session names for each level\n   158→    sessionId: null, // Session ID (UUID) for tracking - 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Wrapper arguments\n   222→ * @param {object} options - Options object to populate\n   223→ */\n   224→function parseWrapperArgs(args, options) {\n   225→  let i = 0;\n   226→  while (i < args.length) {\n   227→    const consumed = parseOption(args, i, options);\n   228→    if (consumed === 0) {\n   229→      if (DEBUG) {\n   230→        console.warn(`Unknown wrapper option: ${args[i]}`);\n   231→      }\n   232→      i++;\n   233→    } else {\n   234→      i += consumed;\n   235→    }\n   236→  }\n   237→}\n   238→\n   239→/**\n   240→ * Parse a single option from args array\n   241→ * @param {string[]} args - Arguments array\n   242→ * @param {number} index - Current index\n   243→ * @param {object} options - Options object to populate\n   244→ * @returns {number} Number of arguments consumed (0 if not recognized)\n   245→ */\n   246→function parseOption(args, index, options) {\n   247→  const arg = args[index];\n   248→\n   249→  // --isolated or -i\n   250→  if (arg === '--isolated' || arg === '-i') {\n   251→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   252→      const value = args[index + 1];\n   253→      parseIsolatedValue(value, options);\n   254→      return 2;\n   255→    } else {\n   256→      throw new Error(\n   257→        `Option ${arg} requires a backend argument (screen, tmux, docker, ssh)`\n   258→      );\n   259→    }\n   260→  }\n   261→\n   262→  // --isolated=<value>\n   263→  if (arg.startsWith('--isolated=')) {\n   264→    const value = arg.split('=')[1];\n   265→    parseIsolatedValue(value, options);\n   266→    return 1;\n   267→  }\n   268→\n   269→  // --attached or -a\n   270→  if (arg === '--attached' || arg === '-a') {\n   271→    options.attached = true;\n   272→    return 1;\n   273→  }\n   274→\n   275→  // --detached or -d\n   276→  if (arg === '--detached' || arg === '-d') {\n   277→    options.detached = true;\n   278→    return 1;\n   279→  }\n   280→\n   281→  // --session or -s\n   282→  if (arg === '--session' || arg === '-s') {\n   283→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   284→      options.session = args[index + 1];\n   285→      return 2;\n   286→    } else {\n   287→      throw new Error(`Option ${arg} requires a session name argument`);\n   288→    }\n   289→  }\n   290→\n   291→  // --session=<value>\n   292→  if (arg.startsWith('--session=')) {\n   293→    options.session = arg.split('=')[1];\n   294→    return 1;\n   295→  }\n   296→\n   297→  // --image (for docker) - supports sequence for stacked isolation\n   298→  if (arg === '--image') {\n   299→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   300→      const value = args[index + 1];\n   301→      parseImageValue(value, options);\n   302→      return 2;\n   303→    } else {\n   304→      throw new Error(`Option ${arg} requires an image name argument`);\n   305→    }\n   306→  }\n   307→\n   308→  // --image=<value>\n   309→  if (arg.startsWith('--image=')) {\n   310→    const value = arg.split('=')[1];\n   311→    parseImageValue(value, options);\n   312→    return 1;\n   313→  }\n   314→\n   315→  // --endpoint (for ssh) - supports sequence for stacked isolation\n   316→  if (arg === '--endpoint') {\n   317→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   318→      const value = args[index + 1];\n   319→      parseEndpointValue(value, options);\n   320→      return 2;\n   321→    } else {\n   322→      throw new Error(`Option ${arg} requires an endpoint argument`);\n   323→    }\n   324→  }\n   325→\n   326→  // --endpoint=<value>\n   327→  if (arg.startsWith('--endpoint=')) {\n   328→    const value = arg.split('=')[1];\n   329→    parseEndpointValue(value, options);\n   330→    return 1;\n   331→  }\n   332→\n   333→  // --isolated-user or -u [optional-username] - 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        "content": "     1→# Architecture\n     2→\n     3→This document describes the architecture of the `$` command (start-command).\n     4→\n     5→## Overview\n     6→\n     7→The start-command is a CLI tool that wraps shell commands to provide automatic logging, error reporting, natural language aliases, and process isolation capabilities.\n     8→\n     9→```\n    10→┌─────────────────────────────────────────────────────────────────────┐\n    11→│                         User Command                                 │\n    12→│                    $ [options] command [args]                        │\n    13→└──────────────────────────────┬──────────────────────────────────────┘\n    14→                               │\n    15→                               ▼\n    16→┌─────────────────────────────────────────────────────────────────────┐\n    17→│                         CLI Entry Point                              │\n    18→│                        src/bin/cli.js                                │\n    19→├─────────────────────────────────────────────────────────────────────┤\n    20→│  • Parse command line arguments                                      │\n    21→│  • Handle --version, --help flags                                    │\n    22→│  • Route to isolation or direct execution                           │\n    23→└──────────────────────────────┬──────────────────────────────────────┘\n    24→                               │\n    25→              ┌────────────────┴────────────────┐\n    26→              │                                 │\n    27→              ▼                                 ▼\n    28→┌─────────────────────────┐      ┌─────────────────────────────────────┐\n    29→│   Direct Execution      │      │     Isolated Execution              │\n    30→│   (no --isolated)       │      │     (--isolated screen/tmux/docker) │\n    31→├─────────────────────────┤      ├─────────────────────────────────────┤\n    32→│ • Spawn shell process   │      │ src/lib/isolation.js                │\n    33→│ • Capture stdout/stderr │      │ • runInScreen()                     │\n    34→│ • Log to temp file      │      │ • runInTmux()                       │\n    35→│ • Report failures       │      │ • runInDocker()                     │\n    36→└─────────────────────────┘      └─────────────────────────────────────┘\n    37→```\n    38→\n    39→## Core Modules\n    40→\n    41→### 1. CLI Entry Point (`src/bin/cli.js`)\n    42→\n    43→The main entry point that:\n    44→\n    45→- Parses command line arguments using `args-parser.js`\n    46→- Processes command substitutions using `substitution.js`\n    47→- Routes execution to direct mode or isolation mode\n    48→- Handles logging and error reporting\n    49→\n    50→### 2. Argument Parser (`src/lib/args-parser.js`)\n    51→\n    52→Parses wrapper options and extracts the command to execute:\n    53→\n    54→```javascript\n    55→{\n    56→  isolated: null,     // 'screen' | 'tmux' | 'docker' | null\n    57→  attached: false,    // Run in attached/foreground mode\n    58→  detached: false,    // Run in detached/background mode\n    59→  session: null,      // Custom session name\n    60→  image: null,        // Docker image name\n    61→  keepAlive: false,   // Keep environment alive after command exits\n    62→}\n    63→```\n    64→\n    65→### 3. Substitution Engine (`src/lib/substitution.js`)\n    66→\n    67→Provides natural language command aliases:\n    68→\n    69→- Loads patterns from `substitutions.lino`\n    70→- Matches user input against patterns with variables\n    71→- Returns substituted command or original if no match\n    72→\n    73→### 4. Isolation Module (`src/lib/isolation.js`)\n    74→\n    75→Handles process isolation in terminal multiplexers and containers:\n    76→\n    77→```\n    78→┌────────────────────────────────────────────────────────────┐\n    79→│                    runIsolated()                            │\n    80→│              (dispatcher function)                          │\n    81→└───────────────┬───────────────┬───────────────┬────────────┘\n    82→                │               │               │\n    83→        ┌───────▼───────┐ ┌─────▼─────┐ ┌───────▼───────┐\n    84→        │  runInScreen  │ │runInTmux  │ │ runInDocker   │\n    85→        │               │ │           │ │               │\n    86→        │ GNU Screen    │ │ tmux      │ │ Docker        │\n    87→        │ multiplexer   │ │ terminal  │ │ containers    │\n    88→        └───────────────┘ └───────────┘ └───────────────┘\n    89→```\n    90→\n    91→## Isolation Architecture\n    92→\n    93→### Execution Modes\n    94→\n    95→| Mode         | Description                                 | Default Behavior               |\n    96→| ------------ | ------------------------------------------- | ------------------------------ |\n    97→| Attached     | Command runs in foreground, interactive     | Session exits after completion |\n    98→| Detached     | Command runs in background                  | Session exits after completion |\n    99→| + Keep-Alive | Session stays alive after command completes | Requires `--keep-alive` flag   |\n   100→\n   101→### Auto-Exit Behavior\n   102→\n   103→By default, all isolation environments automatically exit after command completion:\n   104→\n   105→```\n   106→┌───────────────────────────────────────────────────────────────┐\n   107→│                    Default (keepAlive=false)                  │\n   108→├───────────────────────────────────────────────────────────────┤\n   109→│  1. Start isolation environment                               │\n   110→│  2. Execute command                                           │\n   111→│  3. Capture output (if attached mode)                         │\n   112→│  4. Environment exits automatically                           │\n   113→│  5. Resources freed                                           │\n   114→└───────────────────────────────────────────────────────────────┘\n   115→\n   116→┌───────────────────────────────────────────────────────────────┐\n   117→│                    With --keep-alive                          │\n   118→├───────────────────────────────────────────────────────────────┤\n   119→│  1. Start isolation environment                               │\n   120→│  2. Execute command                                           │\n   121→│  3. Command completes                                         │\n   122→│  4. Shell stays running in session                           │\n   123→│  5. User can reattach and interact                           │\n   124→└───────────────────────────────────────────────────────────────┘\n   125→```\n   126→\n   127→### Screen Isolation\n   128→\n   129→```\n   130→┌─────────────────────────────────────────────────────────────────┐\n   131→│                     Screen Execution Flow                        │\n   132→├─────────────────────────────────────────────────────────────────┤\n   133→│                                                                  │\n   134→│  Attached Mode:                                                  │\n   135→│  ┌─────────────────────────────────────────────────────────┐    │\n   136→│  │ Uses detached mode with log capture internally           │    │\n   137→│  │ • Start: screen -dmS <session> -L -Logfile <log>        │    │\n   138→│  │ • Poll for session completion                            │    │\n   139→│  │ • Read and display captured output                       │    │\n   140→│  │ • Clean up log file                                      │    │\n   141→│  └─────────────────────────────────────────────────────────┘    │\n   142→│                                                                  │\n   143→│  Detached Mode:                                                  │\n   144→│  ┌─────────────────────────────────────────────────────────┐    │\n   145→│  │ • Without keep-alive: screen -dmS <session> sh -c cmd   │    │\n   146→│  │ • With keep-alive: screen -dmS <session> sh -c \"cmd; sh\"│    │\n   147→│  └─────────────────────────────────────────────────────────┘    │\n   148→│                                                                  │\n   149→└─────────────────────────────────────────────────────────────────┘\n   150→```\n   151→\n   152→### tmux Isolation\n   153→\n   154→```\n   155→┌─────────────────────────────────────────────────────────────────┐\n   156→│                      tmux Execution Flow                         │\n   157→├─────────────────────────────────────────────────────────────────┤\n   158→│                                                                  │\n   159→│  Attached Mode:                                                  │\n   160→│  ┌─────────────────────────────────────────────────────────┐    │\n   161→│  │ • tmux new-session -s <session> <command>               │    │\n   162→│  │ • Interactive, exits when command completes             │    │\n   163→│  └─────────────────────────────────────────────────────────┘    │\n   164→│                                                                  │\n   165→│  Detached Mode:                                                  │\n   166→│  ┌─────────────────────────────────────────────────────────┐    │\n   167→│  │ • Without keep-alive: tmux new-session -d -s <session>  │    │\n   168→│  │ • With keep-alive: command followed by shell exec       │    │\n   169→│  └─────────────────────────────────────────────────────────┘    │\n   170→│                                                                  │\n   171→└─────────────────────────────────────────────────────────────────┘\n   172→```\n   173→\n   174→### Docker Isolation\n   175→\n   176→```\n   177→┌─────────────────────────────────────────────────────────────────┐\n   178→│                     Docker Execution Flow                        │\n   179→├─────────────────────────────────────────────────────────────────┤\n   180→│                                                                  │\n   181→│  Attached Mode:                                                  │\n   182→│  ┌─────────────────────────────────────────────────────────┐    │\n   183→│  │ • docker run -it --rm --name <name> <image> sh -c cmd   │    │\n   184→│  │ • Interactive, container auto-removed on exit           │    │\n   185→│  └─────────────────────────────────────────────────────────┘    │\n   186→│                                                                  │\n   187→│  Detached Mode:                                                  │\n   188→│  ┌─────────────────────────────────────────────────────────┐    │\n   189→│  │ • Without keep-alive: docker run -d --name <name> ...   │    │\n   190→│  │ • With keep-alive: command followed by shell exec       │    │\n   191→│  └─────────────────────────────────────────────────────────┘    │\n   192→│                                                                  │\n   193→└─────────────────────────────────────────────────────────────────┘\n   194→```\n   195→\n   196→## Logging Architecture\n   197→\n   198→```\n   199→┌─────────────────────────────────────────────────────────────────┐\n   200→│                       Logging Flow                               │"
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            "text": "Perfect! Now I have enough information to provide a comprehensive report. Let me create the final summary:\n\n## Screen Isolation Implementation Analysis\n\nBased on my thorough exploration of the codebase, here's the complete understanding of the screen isolation implementation:\n\n### 1. **How `$ --isolated screen` Command Works**\n\n#### JavaScript Implementation\n**File**: `/tmp/gh-issue-solver-1773494815317/js/src/lib/screen-isolation.js`\n\nThe command execution flow:\n1. **Screen version detection** (`getScreenVersion()`): Detects if screen >= 4.5.1 to determine logging capability\n2. **Attached vs Detached mode**:\n   - **Attached** (default): Uses detached sessions internally with log capture (`runScreenWithLogCapture`)\n   - **Detached** (`--detached`): Creates session that stays alive or exits based on `--keep-alive` flag\n\nKey functions:\n- `getScreenVersion()` - Parses `screen --version` output, cached after first call\n- `supportsLogfileOption()` - Checks version >= 4.5.1 (when `-Logfile` was added)\n- `runScreenWithLogCapture()` - Main function for attached mode execution (lines 102-296)\n- `resetScreenVersionCache()` - Used for testing\n\n#### Rust Implementation\n**File**: `/tmp/gh-issue-solver-1773494815317/rust/src/lib/isolation_screen.rs`\n\nMirrors the JS implementation with:\n- `get_screen_version()` - Returns tuple `(major, minor, patch)`\n- `supports_logfile_option()` - Version checking logic\n- `run_screen_with_log_capture()` - Core implementation (lines 55-215)\n\n---\n\n### 2. **Screen Session Creation and Management**\n\n#### Session Creation\nBoth implementations use **detached mode with log capture**:\n\n**Command structure for modern screen (>= 4.5.1)**:\n```\nscreen -dmS <sessionName> [-c <screenrc>] -L -Logfile <logfile> /bin/sh -c '<command>'\n```\n\n**Command structure for older screen (< 4.5.1)**:\n```\nscreen -dmS <sessionName> /bin/sh -c '(<command>) 2>&1 | tee \"<logfile>\"'\n```\n\n**Key implementation details**:\n- Uses `spawnSync()` with array args (not string) to avoid quoting issues (Issue #25)\n- Wraps commands with `sudo -u <user>` if user option specified (lines 156-161 in isolation.js)\n- For interactive shell commands (bash, zsh, etc.), passes command directly without shell wrapper\n\n#### Session Management\n- **Session name generation**: Uses `generateSessionName('screen')` from args-parser\n- **Keep-alive mode**: If `--keep-alive` flag, appends `; exec /bin/sh` to command to keep shell running\n- **Auto-exit**: Default behavior - session exits after command completes\n\n---\n\n### 3. **Command Output Capture in Detail**\n\n#### Modern Screen (>= 4.5.1) - Native `-Logfile` Method\n**Files**: \n- JS: `/tmp/gh-issue-solver-1773494815317/js/src/lib/screen-isolation.js` (lines 128-152)\n- Rust: `/tmp/gh-issue-solver-1773494815317/rust/src/lib/isolation_screen.rs` (lines 80-96)\n\n**Steps**:\n1. **Create temporary screenrc file** with `logfile flush 0` to force immediate buffer flushing (Issue #96 - prevents output loss for quick commands like `agent --version`)\n2. **Start screen session** with `-L -Logfile <path>` flags\n3. **Poll for completion** by checking `screen -ls` output every 100ms (max 5 minutes timeout)\n4. **Read log file** once session disappears from `screen -ls`\n5. **Handle race condition**: If log file empty on first read, retry once after 50ms (Issue #96 - tee buffer not yet flushed)\n6. **Display output** to stdout with trailing newline if needed\n7. **Cleanup** temp files (log file and screenrc)\n\n#### Older Screen (< 4.5.1) - Tee Fallback Method\n**Files**: Same as above\n\n**Steps**:\n1. **Wrap command with tee**: `(<command>) 2>&1 | tee \"<logfile>\"`\n2. **Start screen session**: `screen -dmS <session> /bin/sh -c '<wrapped_command>'`\n3. **Poll with retry logic**: Same polling as native method, but with 50ms retry for race condition\n4. **Read and display output** from log file\n5. **Cleanup** log file\n\n**Why tee fallback**:\n- macOS bundled with screen 4.0.3 (no `-Logfile` support)\n- Ensures both stdout and stderr captured: `2>&1 | tee`\n- Parentheses group command output properly\n\n---\n\n### 4. **Log File Handling**\n\n**Files**: \n- JS: `/tmp/gh-issue-solver-1773494815317/js/src/lib/isolation-log-utils.js`\n- Rust: `/tmp/gh-issue-solver-1773494815317/rust/src/lib/isolation_log.rs`\n\n#### Log File Management\n- **Temp directory**: Uses `os.tmpdir()` (JS) or `env::temp_dir()` (Rust)\n- **Log filename format**: `screen-output-<sessionName>.log` (for output capture)\n- **Screenrc file**: `screenrc-<sessionName>` (temporary, for native logging config)\n\n#### Log Structure (for persistent logs, not output capture)\n**Functions**:\n- `getTimestamp()` / `get_timestamp()` - ISO format timestamp\n- `generateLogFilename(environment)` - Unique filename with timestamp + random\n- `createLogHeader(params)` - Contains: command, environment, session, image, user, platform, working directory\n- `createLogFooter(endTime, exitCode)` - Contains: finish time, exit code\n- `createLogPath(environment)` - Constructs full path in `START_LOG_DIR` or system temp\n\n---\n\n### 5. **Verbose Flag Implementation**\n\n**How it works**:\n- **Environment variable**: `START_DEBUG=1` or `START_DEBUG=true`\n- **Entry point**: `/tmp/gh-issue-solver-1773494815317/js/src/bin/cli.js` (lines 51-53)\n- **Scope**: Controls debug output throughout the codebase\n\n**Where verbose is used**:\n1. **Version output**: `--version --verbose` (line 170 in cli.js)\n2. **Execution Store**: `verbose: config.verbose` (line 88)\n3. **Signal handler logging** (lines 109-120)\n4. **Screen module debug**: Lines 43-55 in screen-isolation.js - logs detected version and command\n5. **User manager**: `/tmp/gh-issue-solver-1773494815317/js/src/lib/user-manager.js`\n6. **Isolation module**: Multiple debug logs for shell detection, docker image selection\n7. **Substitution module**: `/tmp/gh-issue-solver-1773494815317/js/src/lib/substitution.js`\n8. **Args parser**: `/tmp/gh-issue-solver-1773494815317/js/src/lib/args-parser.js`\n\n**Rust equivalent**: `is_debug()` function (line 839 in rust/src/lib/isolation.rs)\n\n---\n\n### 6. **Test Infrastructure**\n\n#### Unit Tests\n**JS Test Files**:\n- `/tmp/gh-issue-solver-1773494815317/js/test/isolation.test.js` - Core isolation tests (wrapCommandWithUser, isCommandAvailable, hasTTY, screen version)\n- `/tmp/gh-issue-solver-1773494815317/js/test/isolation-log-utils.test.js` - Log utility tests\n- `/tmp/gh-issue-solver-1773494815317/js/test/isolation-cleanup.test.js` - Cleanup tests\n- `/tmp/gh-issue-solver-1773494815317/js/test/isolation-stacking.test.js` - Multi-level isolation tests\n\n**Rust Test Files**:\n- `/tmp/gh-issue-solver-1773494815317/rust/tests/isolation_unit_test.rs` - Unit tests (mirrors JS tests)\n- `/tmp/gh-issue-solver-1773494815317/rust/tests/isolation_test.rs` - Integration tests\n- `/tmp/gh-issue-solver-1773494815317/rust/tests/isolation_log_test.rs` - Log tests\n\n#### Experiment/Research Files\n**Screen-specific experiments**:\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-logfile.js` - Tests `-L -Logfile` capture (Issue #15 investigation)\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-tee-fallback.js` - Tests tee fallback for older screen (Issue #25)\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-tee-debug.js` - Debug tee fallback race conditions\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-modes.js` - Tests different screen modes\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-attached.js` - Tests attached mode behavior\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-output.sh` - Shell script for output testing\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-version-output.sh` - Version detection testing\n\n#### Test Utilities\n- Both JS and Rust use similar test patterns for:\n  - Command wrapping with sudo\n  - Shell command detection\n  - TTY detection\n  - Command availability checking\n  - Screen version detection\n\n---\n\n### Key Architecture Points\n\n1. **Dual Implementation**: Identical logic in both JS and Rust for compatibility\n2. **Version Detection**: Caches screen version to avoid repeated system calls\n3. **Output Capture Strategy**: \n   - Prefers native `-Logfile` (cleaner, more reliable)\n   - Falls back to tee for older systems (backward compatible)\n4. **Race Condition Handling**: Incorporates 50ms retry for TOCTOU race between `screen -ls` check and file write (Issue #96)\n5. **TTY-aware Execution**: Different handling for attached vs detached modes\n6. **User Isolation**: Wraps commands with `sudo -n -u` for user switching\n7. **Shell Detection**: Identifies interactive shell commands to avoid double-wrapping\n\n**File Paths Summary**:\n- Core JS: `/tmp/gh-issue-solver-1773494815317/js/src/lib/`\n- Core Rust: `/tmp/gh-issue-solver-1773494815317/rust/src/lib/`\n- Tests: `/tmp/gh-issue-solver-1773494815317/js/test/` and `/tmp/gh-issue-solver-1773494815317/rust/tests/`\n- Experiments: `/tmp/gh-issue-solver-1773494815317/experiments/`"
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        "text": "Perfect! Now I have enough information to provide a comprehensive report. Let me create the final summary:\n\n## Screen Isolation Implementation Analysis\n\nBased on my thorough exploration of the codebase, here's the complete understanding of the screen isolation implementation:\n\n### 1. **How `$ --isolated screen` Command Works**\n\n#### JavaScript Implementation\n**File**: `/tmp/gh-issue-solver-1773494815317/js/src/lib/screen-isolation.js`\n\nThe command execution flow:\n1. **Screen version detection** (`getScreenVersion()`): Detects if screen >= 4.5.1 to determine logging capability\n2. **Attached vs Detached mode**:\n   - **Attached** (default): Uses detached sessions internally with log capture (`runScreenWithLogCapture`)\n   - **Detached** (`--detached`): Creates session that stays alive or exits based on `--keep-alive` flag\n\nKey functions:\n- `getScreenVersion()` - Parses `screen --version` output, cached after first call\n- `supportsLogfileOption()` - Checks version >= 4.5.1 (when `-Logfile` was added)\n- `runScreenWithLogCapture()` - Main function for attached mode execution (lines 102-296)\n- `resetScreenVersionCache()` - Used for testing\n\n#### Rust Implementation\n**File**: `/tmp/gh-issue-solver-1773494815317/rust/src/lib/isolation_screen.rs`\n\nMirrors the JS implementation with:\n- `get_screen_version()` - Returns tuple `(major, minor, patch)`\n- `supports_logfile_option()` - Version checking logic\n- `run_screen_with_log_capture()` - Core implementation (lines 55-215)\n\n---\n\n### 2. **Screen Session Creation and Management**\n\n#### Session Creation\nBoth implementations use **detached mode with log capture**:\n\n**Command structure for modern screen (>= 4.5.1)**:\n```\nscreen -dmS <sessionName> [-c <screenrc>] -L -Logfile <logfile> /bin/sh -c '<command>'\n```\n\n**Command structure for older screen (< 4.5.1)**:\n```\nscreen -dmS <sessionName> /bin/sh -c '(<command>) 2>&1 | tee \"<logfile>\"'\n```\n\n**Key implementation details**:\n- Uses `spawnSync()` with array args (not string) to avoid quoting issues (Issue #25)\n- Wraps commands with `sudo -u <user>` if user option specified (lines 156-161 in isolation.js)\n- For interactive shell commands (bash, zsh, etc.), passes command directly without shell wrapper\n\n#### Session Management\n- **Session name generation**: Uses `generateSessionName('screen')` from args-parser\n- **Keep-alive mode**: If `--keep-alive` flag, appends `; exec /bin/sh` to command to keep shell running\n- **Auto-exit**: Default behavior - session exits after command completes\n\n---\n\n### 3. **Command Output Capture in Detail**\n\n#### Modern Screen (>= 4.5.1) - Native `-Logfile` Method\n**Files**: \n- JS: `/tmp/gh-issue-solver-1773494815317/js/src/lib/screen-isolation.js` (lines 128-152)\n- Rust: `/tmp/gh-issue-solver-1773494815317/rust/src/lib/isolation_screen.rs` (lines 80-96)\n\n**Steps**:\n1. **Create temporary screenrc file** with `logfile flush 0` to force immediate buffer flushing (Issue #96 - prevents output loss for quick commands like `agent --version`)\n2. **Start screen session** with `-L -Logfile <path>` flags\n3. **Poll for completion** by checking `screen -ls` output every 100ms (max 5 minutes timeout)\n4. **Read log file** once session disappears from `screen -ls`\n5. **Handle race condition**: If log file empty on first read, retry once after 50ms (Issue #96 - tee buffer not yet flushed)\n6. **Display output** to stdout with trailing newline if needed\n7. **Cleanup** temp files (log file and screenrc)\n\n#### Older Screen (< 4.5.1) - Tee Fallback Method\n**Files**: Same as above\n\n**Steps**:\n1. **Wrap command with tee**: `(<command>) 2>&1 | tee \"<logfile>\"`\n2. **Start screen session**: `screen -dmS <session> /bin/sh -c '<wrapped_command>'`\n3. **Poll with retry logic**: Same polling as native method, but with 50ms retry for race condition\n4. **Read and display output** from log file\n5. **Cleanup** log file\n\n**Why tee fallback**:\n- macOS bundled with screen 4.0.3 (no `-Logfile` support)\n- Ensures both stdout and stderr captured: `2>&1 | tee`\n- Parentheses group command output properly\n\n---\n\n### 4. **Log File Handling**\n\n**Files**: \n- JS: `/tmp/gh-issue-solver-1773494815317/js/src/lib/isolation-log-utils.js`\n- Rust: `/tmp/gh-issue-solver-1773494815317/rust/src/lib/isolation_log.rs`\n\n#### Log File Management\n- **Temp directory**: Uses `os.tmpdir()` (JS) or `env::temp_dir()` (Rust)\n- **Log filename format**: `screen-output-<sessionName>.log` (for output capture)\n- **Screenrc file**: `screenrc-<sessionName>` (temporary, for native logging config)\n\n#### Log Structure (for persistent logs, not output capture)\n**Functions**:\n- `getTimestamp()` / `get_timestamp()` - ISO format timestamp\n- `generateLogFilename(environment)` - Unique filename with timestamp + random\n- `createLogHeader(params)` - Contains: command, environment, session, image, user, platform, working directory\n- `createLogFooter(endTime, exitCode)` - Contains: finish time, exit code\n- `createLogPath(environment)` - Constructs full path in `START_LOG_DIR` or system temp\n\n---\n\n### 5. **Verbose Flag Implementation**\n\n**How it works**:\n- **Environment variable**: `START_DEBUG=1` or `START_DEBUG=true`\n- **Entry point**: `/tmp/gh-issue-solver-1773494815317/js/src/bin/cli.js` (lines 51-53)\n- **Scope**: Controls debug output throughout the codebase\n\n**Where verbose is used**:\n1. **Version output**: `--version --verbose` (line 170 in cli.js)\n2. **Execution Store**: `verbose: config.verbose` (line 88)\n3. **Signal handler logging** (lines 109-120)\n4. **Screen module debug**: Lines 43-55 in screen-isolation.js - logs detected version and command\n5. **User manager**: `/tmp/gh-issue-solver-1773494815317/js/src/lib/user-manager.js`\n6. **Isolation module**: Multiple debug logs for shell detection, docker image selection\n7. **Substitution module**: `/tmp/gh-issue-solver-1773494815317/js/src/lib/substitution.js`\n8. **Args parser**: `/tmp/gh-issue-solver-1773494815317/js/src/lib/args-parser.js`\n\n**Rust equivalent**: `is_debug()` function (line 839 in rust/src/lib/isolation.rs)\n\n---\n\n### 6. **Test Infrastructure**\n\n#### Unit Tests\n**JS Test Files**:\n- `/tmp/gh-issue-solver-1773494815317/js/test/isolation.test.js` - Core isolation tests (wrapCommandWithUser, isCommandAvailable, hasTTY, screen version)\n- `/tmp/gh-issue-solver-1773494815317/js/test/isolation-log-utils.test.js` - Log utility tests\n- `/tmp/gh-issue-solver-1773494815317/js/test/isolation-cleanup.test.js` - Cleanup tests\n- `/tmp/gh-issue-solver-1773494815317/js/test/isolation-stacking.test.js` - Multi-level isolation tests\n\n**Rust Test Files**:\n- `/tmp/gh-issue-solver-1773494815317/rust/tests/isolation_unit_test.rs` - Unit tests (mirrors JS tests)\n- `/tmp/gh-issue-solver-1773494815317/rust/tests/isolation_test.rs` - Integration tests\n- `/tmp/gh-issue-solver-1773494815317/rust/tests/isolation_log_test.rs` - Log tests\n\n#### Experiment/Research Files\n**Screen-specific experiments**:\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-logfile.js` - Tests `-L -Logfile` capture (Issue #15 investigation)\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-tee-fallback.js` - Tests tee fallback for older screen (Issue #25)\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-tee-debug.js` - Debug tee fallback race conditions\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-modes.js` - Tests different screen modes\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-attached.js` - Tests attached mode behavior\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-output.sh` - Shell script for output testing\n- `/tmp/gh-issue-solver-1773494815317/experiments/test-screen-version-output.sh` - Version detection testing\n\n#### Test Utilities\n- Both JS and Rust use similar test patterns for:\n  - Command wrapping with sudo\n  - Shell command detection\n  - TTY detection\n  - Command availability checking\n  - Screen version detection\n\n---\n\n### Key Architecture Points\n\n1. **Dual Implementation**: Identical logic in both JS and Rust for compatibility\n2. **Version Detection**: Caches screen version to avoid repeated system calls\n3. **Output Capture Strategy**: \n   - Prefers native `-Logfile` (cleaner, more reliable)\n   - Falls back to tee for older systems (backward compatible)\n4. **Race Condition Handling**: Incorporates 50ms retry for TOCTOU race between `screen -ls` check and file write (Issue #96)\n5. **TTY-aware Execution**: Different handling for attached vs detached modes\n6. **User Isolation**: Wraps commands with `sudo -n -u` for user switching\n7. **Shell Detection**: Identifies interactive shell commands to avoid double-wrapping\n\n**File Paths Summary**:\n- Core JS: `/tmp/gh-issue-solver-1773494815317/js/src/lib/`\n- Core Rust: `/tmp/gh-issue-solver-1773494815317/rust/src/lib/`\n- Tests: `/tmp/gh-issue-solver-1773494815317/js/test/` and `/tmp/gh-issue-solver-1773494815317/rust/tests/`\n- Experiments: `/tmp/gh-issue-solver-1773494815317/experiments/`"
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        "content": "     1→/** Screen-specific isolation helpers extracted from isolation.js */\n     2→\n     3→const { execSync, spawnSync } = require('child_process');\n     4→const fs = require('fs');\n     5→const os = require('os');\n     6→const path = require('path');\n     7→\n     8→const setTimeout = globalThis.setTimeout;\n     9→\n    10→// Debug mode from environment\n    11→const DEBUG =\n    12→  process.env.START_DEBUG === '1' || process.env.START_DEBUG === 'true';\n    13→\n    14→// Cache for screen version detection\n    15→let cachedScreenVersion = null;\n    16→let screenVersionChecked = false;\n    17→\n    18→/**\n    19→ * Get the installed screen version\n    20→ * @returns {{major: number, minor: number, patch: number}|null} Version object or null if detection fails\n    21→ */\n    22→function getScreenVersion() {\n    23→  if (screenVersionChecked) {\n    24→    return cachedScreenVersion;\n    25→  }\n    26→\n    27→  screenVersionChecked = true;\n    28→\n    29→  try {\n    30→    const output = execSync('screen --version', {\n    31→      encoding: 'utf8',\n    32→      stdio: ['pipe', 'pipe', 'pipe'],\n    33→    });\n    34→    // Match patterns like \"4.09.01\", \"4.00.03\", \"4.5.1\"\n    35→    const match = output.match(/(\\d+)\\.(\\d+)\\.(\\d+)/);\n    36→    if (match) {\n    37→      cachedScreenVersion = {\n    38→        major: parseInt(match[1], 10),\n    39→        minor: parseInt(match[2], 10),\n    40→        patch: parseInt(match[3], 10),\n    41→      };\n    42→\n    43→      if (DEBUG) {\n    44→        console.log(\n    45→          `[DEBUG] Detected screen version: ${cachedScreenVersion.major}.${cachedScreenVersion.minor}.${cachedScreenVersion.patch}`\n    46→        );\n    47→      }\n    48→\n    49→      return cachedScreenVersion;\n    50→    }\n    51→  } catch {\n    52→    if (DEBUG) {\n    53→      console.log('[DEBUG] Could not detect screen version');\n    54→    }\n    55→  }\n    56→\n    57→  return null;\n    58→}\n    59→\n    60→/**\n    61→ * Check if screen supports the -Logfile option\n    62→ * The -Logfile option was introduced in GNU Screen 4.5.1\n    63→ * @returns {boolean} True if -Logfile is supported\n    64→ */\n    65→function supportsLogfileOption() {\n    66→  const version = getScreenVersion();\n    67→  if (!version) {\n    68→    // If we can't detect version, assume older version and use fallback\n    69→    return false;\n    70→  }\n    71→\n    72→  // -Logfile was added in 4.5.1\n    73→  // Compare: version >= 4.5.1\n    74→  if (version.major > 4) {\n    75→    return true;\n    76→  }\n    77→  if (version.major < 4) {\n    78→    return false;\n    79→  }\n    80→  // major === 4\n    81→  if (version.minor > 5) {\n    82→    return true;\n    83→  }\n    84→  if (version.minor < 5) {\n    85→    return false;\n    86→  }\n    87→  // minor === 5\n    88→  return version.patch >= 1;\n    89→}\n    90→\n    91→/**\n    92→ * Run command in GNU Screen using detached mode with log capture.\n    93→ * Supports screen >= 4.5.1 (native -Logfile) and older versions (tee fallback).\n    94→ * @param {string} command - Command to execute\n    95→ * @param {string} sessionName - Session name\n    96→ * @param {object} shellInfo - Shell info from getShell()\n    97→ * @param {string|null} user - Username to run command as (optional)\n    98→ * @param {Function} wrapCommandWithUser - Function to wrap command with user\n    99→ * @param {Function} isInteractiveShellCommand - Function to check if command is interactive shell\n   100→ * @returns {Promise<{success: boolean, sessionName: string, message: string, output: string}>}\n   101→ */\n   102→function runScreenWithLogCapture(\n   103→  command,\n   104→  sessionName,\n   105→  shellInfo,\n   106→  user = null,\n   107→  wrapCommandWithUser,\n   108→  isInteractiveShellCommand\n   109→) {\n   110→  const { shell, shellArg } = shellInfo;\n   111→  const logFile = path.join(os.tmpdir(), `screen-output-${sessionName}.log`);\n   112→\n   113→  // Check if screen supports -Logfile option (added in 4.5.1)\n   114→  const useNativeLogging = supportsLogfileOption();\n   115→\n   116→  return new Promise((resolve) => {\n   117→    try {\n   118→      let screenArgs;\n   119→      // Wrap command with user switch if specified\n   120→      let effectiveCommand = wrapCommandWithUser(command, user);\n   121→\n   122→      // Temporary screenrc file for native logging path (issue #96)\n   123→      // Setting logfile flush 0 forces screen to flush its log buffer after every write,\n   124→      // preventing output loss for quick-completing commands like `agent --version`.\n   125→      // Without this, screen buffers log writes and flushes every 10 seconds by default.\n   126→      let screenrcFile = null;\n   127→\n   128→      if (useNativeLogging) {\n   129→        // Modern screen (>= 4.5.1): Use -L -Logfile option for native log capture\n   130→        // Use a temporary screenrc with `logfile flush 0` to force immediate log flushing\n   131→        // (issue #96: quick commands like `agent --version` lose output without this)\n   132→        screenrcFile = path.join(os.tmpdir(), `screenrc-${sessionName}`);\n   133→        try {\n   134→          fs.writeFileSync(screenrcFile, 'logfile flush 0\\n');\n   135→        } catch {\n   136→          // If we can't create the screenrc, proceed without it (best effort)\n   137→          screenrcFile = null;\n   138→        }\n   139→\n   140→        // screen -dmS <session> -c <screenrc> -L -Logfile <logfile> <shell> -c '<command>'\n   141→        const logArgs = screenrcFile\n   142→          ? ['-dmS', sessionName, '-c', screenrcFile, '-L', '-Logfile', logFile]\n   143→          : ['-dmS', sessionName, '-L', '-Logfile', logFile];\n   144→        screenArgs = isInteractiveShellCommand(command)\n   145→          ? [...logArgs, ...command.trim().split(/\\s+/)]\n   146→          : [...logArgs, shell, shellArg, effectiveCommand];\n   147→\n   148→        if (DEBUG) {\n   149→          console.log(\n   150→            `[DEBUG] Running screen with native log capture (-Logfile): screen ${screenArgs.join(' ')}`\n   151→          );\n   152→        }\n   153→      } else {\n   154→        // Older screen (< 4.5.1, e.g., macOS bundled 4.0.3): Use tee fallback\n   155→        // The parentheses ensure proper grouping of the command and its stderr\n   156→        const isBareShell = isInteractiveShellCommand(command);\n   157→        if (!isBareShell) {\n   158→          effectiveCommand = `(${effectiveCommand}) 2>&1 | tee \"${logFile}\"`;\n   159→        }\n   160→        screenArgs = isBareShell\n   161→          ? ['-dmS', sessionName, ...command.trim().split(/\\s+/)]\n   162→          : ['-dmS', sessionName, shell, shellArg, effectiveCommand];\n   163→\n   164→        if (DEBUG) {\n   165→          console.log(\n   166→            `[DEBUG] Running screen with tee fallback (older screen version): screen ${screenArgs.join(' ')}`\n   167→          );\n   168→        }\n   169→      }\n   170→\n   171→      // Use spawnSync with array args (not execSync string) to avoid quoting issues (issue #25)\n   172→      const result = spawnSync('screen', screenArgs, {\n   173→        stdio: 'inherit',\n   174→      });\n   175→\n   176→      if (result.error) {\n   177→        throw result.error;\n   178→      }\n   179→\n   180→      // Helper to read log file output and write to stdout\n   181→      // Includes a short retry for the tee fallback path to handle the TOCTOU race\n   182→      // condition where the session appears gone but the log file isn't fully written yet\n   183→      // (issue #96)\n   184→      const readAndDisplayOutput = (retryCount = 0) => {\n   185→        let output = '';\n   186→        try {\n   187→          output = fs.readFileSync(logFile, 'utf8');\n   188→        } catch {\n   189→          // Log file might not exist if command produced no output\n   190→        }\n   191→\n   192→        // If output is empty and we haven't retried yet, wait briefly and retry once.\n   193→        // This handles the race where tee's write hasn't been flushed to disk yet\n   194→        // when the screen session appears done in `screen -ls` (issue #96).\n   195→        if (!output.trim() && retryCount === 0) {\n   196→          return new Promise((resolveRetry) => {\n   197→            setTimeout(() => {\n   198→              resolveRetry(readAndDisplayOutput(1));\n   199→            }, 50);\n   200→          });\n   201→        }\n   202→\n   203→        // Display the output\n   204→        if (output.trim()) {\n   205→          process.stdout.write(output);\n   206→          // Add trailing newline if output doesn't end with one\n   207→          if (!output.endsWith('\\n')) {\n   208→            process.stdout.write('\\n');\n   209→          }\n   210→        }\n   211→        return Promise.resolve(output);\n   212→      };\n   213→\n   214→      // Clean up temp files\n   215→      const cleanupTempFiles = () => {\n   216→        try {\n   217→          fs.unlinkSync(logFile);\n   218→        } catch {\n   219→          // Ignore cleanup errors\n   220→        }\n   221→        if (screenrcFile) {\n   222→          try {\n   223→            fs.unlinkSync(screenrcFile);\n   224→          } catch {\n   225→            // Ignore cleanup errors\n   226→          }\n   227→        }\n   228→      };\n   229→\n   230→      // Poll for session completion\n   231→      const checkInterval = 100; // ms\n   232→      const maxWait = 300000; // 5 minutes max\n   233→      let waited = 0;\n   234→\n   235→      const checkCompletion = () => {\n   236→        try {\n   237→          // Check if session still exists\n   238→          const sessions = execSync('screen -ls', {\n   239→            encoding: 'utf8',\n   240→            stdio: ['pipe', 'pipe', 'pipe'],\n   241→          });\n   242→\n   243→          if (!sessions.includes(sessionName)) {\n   244→            // Session ended, read output (with retry for tee path race condition)\n   245→            readAndDisplayOutput().then((output) => {\n   246→              cleanupTempFiles();\n   247→              resolve({\n   248→                success: true,\n   249→                sessionName,\n   250→                message: `Screen session \"${sessionName}\" exited with code 0`,\n   251→                exitCode: 0,\n   252→                output,\n   253→              });\n   254→            });\n   255→            return;\n   256→          }\n   257→\n   258→          waited += checkInterval;\n   259→          if (waited >= maxWait) {\n   260→            cleanupTempFiles();\n   261→            resolve({\n   262→              success: false,\n   263→              sessionName,\n   264→              message: `Screen session \"${sessionName}\" timed out after ${maxWait / 1000} seconds`,\n   265→              exitCode: 1,\n   266→            });\n   267→            return;\n   268→          }\n   269→\n   270→          setTimeout(checkCompletion, checkInterval);\n   271→        } catch {\n   272→          // screen -ls failed, session probably ended\n   273→          readAndDisplayOutput().then((output) => {\n   274→            cleanupTempFiles();\n   275→            resolve({\n   276→              success: true,\n   277→              sessionName,\n   278→              message: `Screen session \"${sessionName}\" exited with code 0`,\n   279→              exitCode: 0,\n   280→              output,\n   281→            });\n   282→          });\n   283→        }\n   284→      };\n   285→\n   286→      // Start checking after a brief delay\n   287→      setTimeout(checkCompletion, checkInterval);\n   288→    } catch (err) {\n   289→      resolve({\n   290→        success: false,\n   291→        sessionName,\n   292→        message: `Failed to run in screen: ${err.message}`,\n   293→      });\n   294→    }\n   295→  });\n   296→}\n   297→\n   298→/** Reset screen version cache (useful for testing) */\n   299→function resetScreenVersionCache() {\n   300→  cachedScreenVersion = null;\n   301→  screenVersionChecked = false;\n   302→}\n   303→\n   304→module.exports = {\n   305→  getScreenVersion,\n   306→  supportsLogfileOption,\n   307→  runScreenWithLogCapture,\n   308→  resetScreenVersionCache,\n   309→};\n   310→"
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      "content": "/** Screen-specific isolation helpers extracted from isolation.js */\n\nconst { execSync, spawnSync } = require('child_process');\nconst fs = require('fs');\nconst os = require('os');\nconst path = require('path');\n\nconst setTimeout = globalThis.setTimeout;\n\n// Debug mode from environment\nconst DEBUG =\n  process.env.START_DEBUG === '1' || process.env.START_DEBUG === 'true';\n\n// Cache for screen version detection\nlet cachedScreenVersion = null;\nlet screenVersionChecked = false;\n\n/**\n * Get the installed screen version\n * @returns {{major: number, minor: number, patch: number}|null} Version object or null if detection fails\n */\nfunction getScreenVersion() {\n  if (screenVersionChecked) {\n    return cachedScreenVersion;\n  }\n\n  screenVersionChecked = true;\n\n  try {\n    const output = execSync('screen --version', {\n      encoding: 'utf8',\n      stdio: ['pipe', 'pipe', 'pipe'],\n    });\n    // Match patterns like \"4.09.01\", \"4.00.03\", \"4.5.1\"\n    const match = output.match(/(\\d+)\\.(\\d+)\\.(\\d+)/);\n    if (match) {\n      cachedScreenVersion = {\n        major: parseInt(match[1], 10),\n        minor: parseInt(match[2], 10),\n        patch: parseInt(match[3], 10),\n      };\n\n      if (DEBUG) {\n        console.log(\n          `[DEBUG] Detected screen version: ${cachedScreenVersion.major}.${cachedScreenVersion.minor}.${cachedScreenVersion.patch}`\n        );\n      }\n\n      return cachedScreenVersion;\n    }\n  } catch {\n    if (DEBUG) {\n      console.log('[DEBUG] Could not detect screen version');\n    }\n  }\n\n  return null;\n}\n\n/**\n * Check if screen supports the -Logfile option\n * The -Logfile option was introduced in GNU Screen 4.5.1\n * @returns {boolean} True if -Logfile is supported\n */\nfunction supportsLogfileOption() {\n  const version = getScreenVersion();\n  if (!version) {\n    // If we can't detect version, assume older version and use fallback\n    return false;\n  }\n\n  // -Logfile was added in 4.5.1\n  // Compare: version >= 4.5.1\n  if (version.major > 4) {\n    return true;\n  }\n  if (version.major < 4) {\n    return false;\n  }\n  // major === 4\n  if (version.minor > 5) {\n    return true;\n  }\n  if (version.minor < 5) {\n    return false;\n  }\n  // minor === 5\n  return version.patch >= 1;\n}\n\n/**\n * Run command in GNU Screen using detached mode with log capture.\n * Supports screen >= 4.5.1 (native -Logfile) and older versions (tee fallback).\n * @param {string} command - Command to execute\n * @param {string} sessionName - Session name\n * @param {object} shellInfo - Shell info from getShell()\n * @param {string|null} user - Username to run command as (optional)\n * @param {Function} wrapCommandWithUser - Function to wrap command with user\n * @param {Function} isInteractiveShellCommand - Function to check if command is interactive shell\n * @returns {Promise<{success: boolean, sessionName: string, message: string, output: string}>}\n */\nfunction runScreenWithLogCapture(\n  command,\n  sessionName,\n  shellInfo,\n  user = null,\n  wrapCommandWithUser,\n  isInteractiveShellCommand\n) {\n  const { shell, shellArg } = shellInfo;\n  const logFile = path.join(os.tmpdir(), `screen-output-${sessionName}.log`);\n\n  // Check if screen supports -Logfile option (added in 4.5.1)\n  const useNativeLogging = supportsLogfileOption();\n\n  return new Promise((resolve) => {\n    try {\n      let screenArgs;\n      // Wrap command with user switch if specified\n      let effectiveCommand = wrapCommandWithUser(command, user);\n\n      // Temporary screenrc file for native logging path (issue #96)\n      // Setting logfile flush 0 forces screen to flush its log buffer after every write,\n      // preventing output loss for quick-completing commands like `agent --version`.\n      // Without this, screen buffers log writes and flushes every 10 seconds by default.\n      let screenrcFile = null;\n\n      if (useNativeLogging) {\n        // Modern screen (>= 4.5.1): Use -L -Logfile option for native log capture\n        // Use a temporary screenrc with `logfile flush 0` to force immediate log flushing\n        // (issue #96: quick commands like `agent --version` lose output without this)\n        screenrcFile = path.join(os.tmpdir(), `screenrc-${sessionName}`);\n        try {\n          fs.writeFileSync(screenrcFile, 'logfile flush 0\\n');\n        } catch {\n          // If we can't create the screenrc, proceed without it (best effort)\n          screenrcFile = null;\n        }\n\n        // screen -dmS <session> -c <screenrc> -L -Logfile <logfile> <shell> -c '<command>'\n        const logArgs = screenrcFile\n          ? ['-dmS', sessionName, '-c', screenrcFile, '-L', '-Logfile', logFile]\n          : ['-dmS', sessionName, '-L', '-Logfile', logFile];\n        screenArgs = isInteractiveShellCommand(command)\n          ? [...logArgs, ...command.trim().split(/\\s+/)]\n          : [...logArgs, shell, shellArg, effectiveCommand];\n\n        if (DEBUG) {\n          console.log(\n            `[DEBUG] Running screen with native log capture (-Logfile): screen ${screenArgs.join(' ')}`\n          );\n        }\n      } else {\n        // Older screen (< 4.5.1, e.g., macOS bundled 4.0.3): Use tee fallback\n        // The parentheses ensure proper grouping of the command and its stderr\n        const isBareShell = isInteractiveShellCommand(command);\n        if (!isBareShell) {\n          effectiveCommand = `(${effectiveCommand}) 2>&1 | tee \"${logFile}\"`;\n        }\n        screenArgs = isBareShell\n          ? ['-dmS', sessionName, ...command.trim().split(/\\s+/)]\n          : ['-dmS', sessionName, shell, shellArg, effectiveCommand];\n\n        if (DEBUG) {\n          console.log(\n            `[DEBUG] Running screen with tee fallback (older screen version): screen ${screenArgs.join(' ')}`\n          );\n        }\n      }\n\n      // Use spawnSync with array args (not execSync string) to avoid quoting issues (issue #25)\n      const result = spawnSync('screen', screenArgs, {\n        stdio: 'inherit',\n      });\n\n      if (result.error) {\n        throw result.error;\n      }\n\n      // Helper to read log file output and write to stdout\n      // Includes a short retry for the tee fallback path to handle the TOCTOU race\n      // condition where the session appears gone but the log file isn't fully written yet\n      // (issue #96)\n      const readAndDisplayOutput = (retryCount = 0) => {\n        let output = '';\n        try {\n          output = fs.readFileSync(logFile, 'utf8');\n        } catch {\n          // Log file might not exist if command produced no output\n        }\n\n        // If output is empty and we haven't retried yet, wait briefly and retry once.\n        // This handles the race where tee's write hasn't been flushed to disk yet\n        // when the screen session appears done in `screen -ls` (issue #96).\n        if (!output.trim() && retryCount === 0) {\n          return new Promise((resolveRetry) => {\n            setTimeout(() => {\n              resolveRetry(readAndDisplayOutput(1));\n            }, 50);\n          });\n        }\n\n        // Display the output\n        if (output.trim()) {\n          process.stdout.write(output);\n          // Add trailing newline if output doesn't end with one\n          if (!output.endsWith('\\n')) {\n            process.stdout.write('\\n');\n          }\n        }\n        return Promise.resolve(output);\n      };\n\n      // Clean up temp files\n      const cleanupTempFiles = () => {\n        try {\n          fs.unlinkSync(logFile);\n        } catch {\n          // Ignore cleanup errors\n        }\n        if (screenrcFile) {\n          try {\n            fs.unlinkSync(screenrcFile);\n          } catch {\n            // Ignore cleanup errors\n          }\n        }\n      };\n\n      // Poll for session completion\n      const checkInterval = 100; // ms\n      const maxWait = 300000; // 5 minutes max\n      let waited = 0;\n\n      const checkCompletion = () => {\n        try {\n          // Check if session still exists\n          const sessions = execSync('screen -ls', {\n            encoding: 'utf8',\n            stdio: ['pipe', 'pipe', 'pipe'],\n          });\n\n          if (!sessions.includes(sessionName)) {\n            // Session ended, read output (with retry for tee path race condition)\n            readAndDisplayOutput().then((output) => {\n              cleanupTempFiles();\n              resolve({\n                success: true,\n                sessionName,\n                message: `Screen session \"${sessionName}\" exited with code 0`,\n                exitCode: 0,\n                output,\n              });\n            });\n            return;\n          }\n\n          waited += checkInterval;\n          if (waited >= maxWait) {\n            cleanupTempFiles();\n            resolve({\n              success: false,\n              sessionName,\n              message: `Screen session \"${sessionName}\" timed out after ${maxWait / 1000} seconds`,\n              exitCode: 1,\n            });\n            return;\n          }\n\n          setTimeout(checkCompletion, checkInterval);\n        } catch {\n          // screen -ls failed, session probably ended\n          readAndDisplayOutput().then((output) => {\n            cleanupTempFiles();\n            resolve({\n              success: true,\n              sessionName,\n              message: `Screen session \"${sessionName}\" exited with code 0`,\n              exitCode: 0,\n              output,\n            });\n          });\n        }\n      };\n\n      // Start checking after a brief delay\n      setTimeout(checkCompletion, checkInterval);\n    } catch (err) {\n      resolve({\n        success: false,\n        sessionName,\n        message: `Failed to run in screen: ${err.message}`,\n      });\n    }\n  });\n}\n\n/** Reset screen version cache (useful for testing) */\nfunction resetScreenVersionCache() {\n  cachedScreenVersion = null;\n  screenVersionChecked = false;\n}\n\nmodule.exports = {\n  getScreenVersion,\n  supportsLogfileOption,\n  runScreenWithLogCapture,\n  resetScreenVersionCache,\n};\n",
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        "content": "     1→//! Screen-specific isolation helpers extracted from isolation.rs\n     2→\n     3→use std::env;\n     4→use std::fs;\n     5→use std::process::{Command, Stdio};\n     6→use std::thread;\n     7→use std::time::Duration;\n     8→\n     9→use super::{get_shell, is_debug, wrap_command_with_user, IsolationResult};\n    10→\n    11→/// Get the installed screen version\n    12→pub fn get_screen_version() -> Option<(u32, u32, u32)> {\n    13→    let output = Command::new(\"screen\").arg(\"--version\").output().ok()?;\n    14→\n    15→    let output_str = String::from_utf8_lossy(&output.stdout);\n    16→    let stderr_str = String::from_utf8_lossy(&output.stderr);\n    17→    let combined = format!(\"{}{}\", output_str, stderr_str);\n    18→\n    19→    // Match patterns like \"4.09.01\", \"4.00.03\", \"4.5.1\"\n    20→    let re = regex::Regex::new(r\"(\\d+)\\.(\\d+)\\.(\\d+)\").ok()?;\n    21→    let caps = re.captures(&combined)?;\n    22→\n    23→    Some((\n    24→        caps.get(1)?.as_str().parse().ok()?,\n    25→        caps.get(2)?.as_str().parse().ok()?,\n    26→        caps.get(3)?.as_str().parse().ok()?,\n    27→    ))\n    28→}\n    29→\n    30→/// Check if screen supports the -Logfile option (added in 4.5.1)\n    31→pub fn supports_logfile_option() -> bool {\n    32→    match get_screen_version() {\n    33→        Some((major, minor, patch)) => {\n    34→            if major > 4 {\n    35→                return true;\n    36→            }\n    37→            if major < 4 {\n    38→                return false;\n    39→            }\n    40→            // major == 4\n    41→            if minor > 5 {\n    42→                return true;\n    43→            }\n    44→            if minor < 5 {\n    45→                return false;\n    46→            }\n    47→            // minor == 5\n    48→            patch >= 1\n    49→        }\n    50→        None => false,\n    51→    }\n    52→}\n    53→\n    54→/// Run screen with log capture (for attached mode without TTY)\n    55→pub fn run_screen_with_log_capture(\n    56→    command: &str,\n    57→    session_name: &str,\n    58→    user: Option<&str>,\n    59→) -> IsolationResult {\n    60→    let (shell, shell_arg) = get_shell();\n    61→    let log_file = env::temp_dir().join(format!(\"screen-output-{}.log\", session_name));\n    62→    let effective_command = wrap_command_with_user(command, user);\n    63→\n    64→    let use_native_logging = supports_logfile_option();\n    65→\n    66→    // Temporary screenrc file for native logging path (issue #96)\n    67→    // Setting logfile flush 0 forces screen to flush its log buffer after every write,\n    68→    // preventing output loss for quick-completing commands like `agent --version`.\n    69→    // Without this, screen buffers log writes and flushes every 10 seconds by default.\n    70→    let screenrc_file = if use_native_logging {\n    71→        let screenrc_path = env::temp_dir().join(format!(\"screenrc-{}\", session_name));\n    72→        match fs::write(&screenrc_path, \"logfile flush 0\\n\") {\n    73→            Ok(()) => Some(screenrc_path),\n    74→            Err(_) => None, // If we can't create the screenrc, proceed without it (best effort)\n    75→        }\n    76→    } else {\n    77→        None\n    78→    };\n    79→\n    80→    let screen_args: Vec<String> = if use_native_logging {\n    81→        // Use a temporary screenrc with `logfile flush 0` to force immediate log flushing\n    82→        // (issue #96: quick commands like `agent --version` lose output without this)\n    83→        let mut args = vec![\"-dmS\".to_string(), session_name.to_string()];\n    84→        if let Some(ref rc_path) = screenrc_file {\n    85→            args.push(\"-c\".to_string());\n    86→            args.push(rc_path.to_string_lossy().to_string());\n    87→        }\n    88→        args.extend([\n    89→            \"-L\".to_string(),\n    90→            \"-Logfile\".to_string(),\n    91→            log_file.to_string_lossy().to_string(),\n    92→            shell.clone(),\n    93→            shell_arg.clone(),\n    94→            effective_command.clone(),\n    95→        ]);\n    96→        args\n    97→    } else {\n    98→        // Use tee fallback for older screen versions\n    99→        let tee_command = format!(\n   100→            \"({}) 2>&1 | tee \\\"{}\\\"\",\n   101→            effective_command,\n   102→            log_file.display()\n   103→        );\n   104→        vec![\n   105→            \"-dmS\".to_string(),\n   106→            session_name.to_string(),\n   107→            shell.clone(),\n   108→            shell_arg.clone(),\n   109→            tee_command,\n   110→        ]\n   111→    };\n   112→\n   113→    if is_debug() {\n   114→        eprintln!(\"[DEBUG] Running: screen {:?}\", screen_args);\n   115→    }\n   116→\n   117→    let status = Command::new(\"screen\")\n   118→        .args(&screen_args)\n   119→        .stdout(Stdio::null())\n   120→        .stderr(Stdio::null())\n   121→        .status();\n   122→\n   123→    if status.is_err() {\n   124→        // Clean up screenrc temp file on error\n   125→        if let Some(ref rc_path) = screenrc_file {\n   126→            let _ = fs::remove_file(rc_path);\n   127→        }\n   128→        return IsolationResult {\n   129→            success: false,\n   130→            session_name: Some(session_name.to_string()),\n   131→            message: \"Failed to start screen session\".to_string(),\n   132→            ..Default::default()\n   133→        };\n   134→    }\n   135→\n   136→    // Helper to read log file with retry for the tee fallback TOCTOU race condition\n   137→    // (issue #96: session may appear done in `screen -ls` before tee finishes writing)\n   138→    let read_log_with_retry = |retry_count: u32| -> Option<String> {\n   139→        let content = fs::read_to_string(&log_file).ok();\n   140→        if retry_count == 0 {\n   141→            if let Some(ref s) = content {\n   142→                if s.trim().is_empty() {\n   143→                    // Brief wait then retry once for tee path race condition\n   144→                    thread::sleep(Duration::from_millis(50));\n   145→                    return fs::read_to_string(&log_file).ok();\n   146→                }\n   147→            }\n   148→        }\n   149→        content\n   150→    };\n   151→\n   152→    // Clean up temp files helper\n   153→    let cleanup = || {\n   154→        let _ = fs::remove_file(&log_file);\n   155→        if let Some(ref rc_path) = screenrc_file {\n   156→            let _ = fs::remove_file(rc_path);\n   157→        }\n   158→    };\n   159→\n   160→    // Poll for session completion\n   161→    let max_wait = Duration::from_secs(300);\n   162→    let check_interval = Duration::from_millis(100);\n   163→    let mut waited = Duration::ZERO;\n   164→\n   165→    loop {\n   166→        // Check if session still exists\n   167→        let sessions = Command::new(\"screen\")\n   168→            .arg(\"-ls\")\n   169→            .output()\n   170→            .map(|o| String::from_utf8_lossy(&o.stdout).to_string())\n   171→            .unwrap_or_default();\n   172→\n   173→        if !sessions.contains(session_name) {\n   174→            // Session ended, read output (with retry for tee path race condition)\n   175→            let output = read_log_with_retry(0);\n   176→\n   177→            // Display output\n   178→            if let Some(ref out) = output {\n   179→                if !out.trim().is_empty() {\n   180→                    print!(\"{}\", out);\n   181→                }\n   182→            }\n   183→\n   184→            // Clean up temp files\n   185→            cleanup();\n   186→\n   187→            return IsolationResult {\n   188→                success: true,\n   189→                session_name: Some(session_name.to_string()),\n   190→                container_id: None,\n   191→                message: format!(\"Screen session \\\"{}\\\" exited with code 0\", session_name),\n   192→                exit_code: Some(0),\n   193→                output,\n   194→            };\n   195→        }\n   196→\n   197→        thread::sleep(check_interval);\n   198→        waited += check_interval;\n   199→\n   200→        if waited >= max_wait {\n   201→            cleanup();\n   202→            return IsolationResult {\n   203→                success: false,\n   204→                session_name: Some(session_name.to_string()),\n   205→                message: format!(\n   206→                    \"Screen session \\\"{}\\\" timed out after {} seconds\",\n   207→                    session_name,\n   208→                    max_wait.as_secs()\n   209→                ),\n   210→                exit_code: Some(1),\n   211→                ..Default::default()\n   212→            };\n   213→        }\n   214→    }\n   215→}\n   216→"
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      "filePath": "/tmp/gh-issue-solver-1773494815317/rust/src/lib/isolation_screen.rs",
      "content": "//! Screen-specific isolation helpers extracted from isolation.rs\n\nuse std::env;\nuse std::fs;\nuse std::process::{Command, Stdio};\nuse std::thread;\nuse std::time::Duration;\n\nuse super::{get_shell, is_debug, wrap_command_with_user, IsolationResult};\n\n/// Get the installed screen version\npub fn get_screen_version() -> Option<(u32, u32, u32)> {\n    let output = Command::new(\"screen\").arg(\"--version\").output().ok()?;\n\n    let output_str = String::from_utf8_lossy(&output.stdout);\n    let stderr_str = String::from_utf8_lossy(&output.stderr);\n    let combined = format!(\"{}{}\", output_str, stderr_str);\n\n    // Match patterns like \"4.09.01\", \"4.00.03\", \"4.5.1\"\n    let re = regex::Regex::new(r\"(\\d+)\\.(\\d+)\\.(\\d+)\").ok()?;\n    let caps = re.captures(&combined)?;\n\n    Some((\n        caps.get(1)?.as_str().parse().ok()?,\n        caps.get(2)?.as_str().parse().ok()?,\n        caps.get(3)?.as_str().parse().ok()?,\n    ))\n}\n\n/// Check if screen supports the -Logfile option (added in 4.5.1)\npub fn supports_logfile_option() -> bool {\n    match get_screen_version() {\n        Some((major, minor, patch)) => {\n            if major > 4 {\n                return true;\n            }\n            if major < 4 {\n                return false;\n            }\n            // major == 4\n            if minor > 5 {\n                return true;\n            }\n            if minor < 5 {\n                return false;\n            }\n            // minor == 5\n            patch >= 1\n        }\n        None => false,\n    }\n}\n\n/// Run screen with log capture (for attached mode without TTY)\npub fn run_screen_with_log_capture(\n    command: &str,\n    session_name: &str,\n    user: Option<&str>,\n) -> IsolationResult {\n    let (shell, shell_arg) = get_shell();\n    let log_file = env::temp_dir().join(format!(\"screen-output-{}.log\", session_name));\n    let effective_command = wrap_command_with_user(command, user);\n\n    let use_native_logging = supports_logfile_option();\n\n    // Temporary screenrc file for native logging path (issue #96)\n    // Setting logfile flush 0 forces screen to flush its log buffer after every write,\n    // preventing output loss for quick-completing commands like `agent --version`.\n    // Without this, screen buffers log writes and flushes every 10 seconds by default.\n    let screenrc_file = if use_native_logging {\n        let screenrc_path = env::temp_dir().join(format!(\"screenrc-{}\", session_name));\n        match fs::write(&screenrc_path, \"logfile flush 0\\n\") {\n            Ok(()) => Some(screenrc_path),\n            Err(_) => None, // If we can't create the screenrc, proceed without it (best effort)\n        }\n    } else {\n        None\n    };\n\n    let screen_args: Vec<String> = if use_native_logging {\n        // Use a temporary screenrc with `logfile flush 0` to force immediate log flushing\n        // (issue #96: quick commands like `agent --version` lose output without this)\n        let mut args = vec![\"-dmS\".to_string(), session_name.to_string()];\n        if let Some(ref rc_path) = screenrc_file {\n            args.push(\"-c\".to_string());\n            args.push(rc_path.to_string_lossy().to_string());\n        }\n        args.extend([\n            \"-L\".to_string(),\n            \"-Logfile\".to_string(),\n            log_file.to_string_lossy().to_string(),\n            shell.clone(),\n            shell_arg.clone(),\n            effective_command.clone(),\n        ]);\n        args\n    } else {\n        // Use tee fallback for older screen versions\n        let tee_command = format!(\n            \"({}) 2>&1 | tee \\\"{}\\\"\",\n            effective_command,\n            log_file.display()\n        );\n        vec![\n            \"-dmS\".to_string(),\n            session_name.to_string(),\n            shell.clone(),\n            shell_arg.clone(),\n            tee_command,\n        ]\n    };\n\n    if is_debug() {\n        eprintln!(\"[DEBUG] Running: screen {:?}\", screen_args);\n    }\n\n    let status = Command::new(\"screen\")\n        .args(&screen_args)\n        .stdout(Stdio::null())\n        .stderr(Stdio::null())\n        .status();\n\n    if status.is_err() {\n        // Clean up screenrc temp file on error\n        if let Some(ref rc_path) = screenrc_file {\n            let _ = fs::remove_file(rc_path);\n        }\n        return IsolationResult {\n            success: false,\n            session_name: Some(session_name.to_string()),\n            message: \"Failed to start screen session\".to_string(),\n            ..Default::default()\n        };\n    }\n\n    // Helper to read log file with retry for the tee fallback TOCTOU race condition\n    // (issue #96: session may appear done in `screen -ls` before tee finishes writing)\n    let read_log_with_retry = |retry_count: u32| -> Option<String> {\n        let content = fs::read_to_string(&log_file).ok();\n        if retry_count == 0 {\n            if let Some(ref 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        "text": "Now let me look at the issue output more carefully. The user reports `screen --version` shows `Screen version 4.00.03` on macOS, which is < 4.5.1, so the **tee fallback path** is being used. Let me also read the CLI entry point and how the isolation mode is invoked."
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        "content": "     1→#!/usr/bin/env bun\n     2→\n     3→const process = require('process');\n     4→const os = require('os');\n     5→const fs = require('fs');\n     6→const path = require('path');\n     7→\n     8→// Import modules\n     9→const { processCommand } = require('../lib/substitution');\n    10→const {\n    11→  parseArgs,\n    12→  hasIsolation,\n    13→  getEffectiveMode,\n    14→  generateUUID,\n    15→} = require('../lib/args-parser');\n    16→const {\n    17→  runIsolated,\n    18→  runAsIsolatedUser,\n    19→  getTimestamp,\n    20→  createLogHeader,\n    21→  createLogFooter,\n    22→  writeLogFile,\n    23→  createLogPath,\n    24→  getDefaultDockerImage,\n    25→} = require('../lib/isolation');\n    26→const {\n    27→  createIsolatedUser,\n    28→  deleteUser,\n    29→  hasSudoAccess,\n    30→  getCurrentUserGroups,\n    31→} = require('../lib/user-manager');\n    32→const { handleFailure } = require('../lib/failure-handler');\n    33→const { ExecutionStore, ExecutionRecord } = require('../lib/execution-store');\n    34→const { queryStatus } = require('../lib/status-formatter');\n    35→const { printVersion } = require('../lib/version');\n    36→const { createStartBlock, createFinishBlock } = require('../lib/output-blocks');\n    37→const { runWithBunSpawn, runWithNodeSpawn } = require('../lib/spawn-helpers');\n    38→\n    39→// Configuration from environment variables\n    40→const config = {\n    41→  // Disable automatic issue creation (useful for testing)\n    42→  disableAutoIssue:\n    43→    process.env.START_DISABLE_AUTO_ISSUE === '1' ||\n    44→    process.env.START_DISABLE_AUTO_ISSUE === 'true',\n    45→  // Disable log upload\n    46→  disableLogUpload:\n    47→    process.env.START_DISABLE_LOG_UPLOAD === '1' ||\n    48→    process.env.START_DISABLE_LOG_UPLOAD === 'true',\n    49→  // Custom log directory (defaults to OS temp)\n    50→  logDir: process.env.START_LOG_DIR || null,\n    51→  // Verbose mode\n    52→  verbose:\n    53→    process.env.START_VERBOSE === '1' || process.env.START_VERBOSE === 'true',\n    54→  // Disable substitutions/aliases\n    55→  disableSubstitutions:\n    56→    process.env.START_DISABLE_SUBSTITUTIONS === '1' ||\n    57→    process.env.START_DISABLE_SUBSTITUTIONS === 'true',\n    58→  // Custom substitutions file path\n    59→  substitutionsPath: process.env.START_SUBSTITUTIONS_PATH || null,\n    60→  // Use command-stream library for command execution (experimental)\n    61→  useCommandStream:\n    62→    process.env.START_USE_COMMAND_STREAM === '1' ||\n    63→    process.env.START_USE_COMMAND_STREAM === 'true',\n    64→  // Disable execution tracking\n    65→  disableTracking:\n    66→    process.env.START_DISABLE_TRACKING === '1' ||\n    67→    process.env.START_DISABLE_TRACKING === 'true',\n    68→  // Custom app folder for storing execution records (defaults to ~/.start-command)\n    69→  appFolder:\n    70→    process.env.START_APP_FOLDER || path.join(os.homedir(), '.start-command'),\n    71→};\n    72→\n    73→// Global execution store instance (initialized lazily)\n    74→let executionStore = null;\n    75→\n    76→// Global reference to current execution record for cleanup on signals\n    77→// This allows us to mark the execution as completed if the process is interrupted\n    78→let currentExecutionRecord = null;\n    79→\n    80→/**\n    81→ * Get the execution store instance\n    82→ * @returns {ExecutionStore}\n    83→ */\n    84→function getExecutionStore() {\n    85→  if (!executionStore && !config.disableTracking) {\n    86→    executionStore = new ExecutionStore({\n    87→      appFolder: config.appFolder || undefined,\n    88→      verbose: config.verbose,\n    89→    });\n    90→  }\n    91→  return executionStore;\n    92→}\n    93→\n    94→/**\n    95→ * Cleanup handler for signals and process exit\n    96→ * Marks the current execution as completed with an appropriate exit code\n    97→ * @param {string} signal - The signal that triggered the cleanup (e.g., 'SIGINT', 'SIGTERM')\n    98→ * @param {number} exitCode - The exit code to use\n    99→ */\n   100→function cleanupExecution(signal, exitCode) {\n   101→  if (currentExecutionRecord && executionStore) {\n   102→    // Signal-based exit codes:\n   103→    // SIGINT (Ctrl+C): 130 (128 + 2)\n   104→    // SIGTERM: 143 (128 + 15)\n   105→    // SIGHUP: 129 (128 + 1)\n   106→    currentExecutionRecord.complete(exitCode);\n   107→    try {\n   108→      executionStore.save(currentExecutionRecord);\n   109→      if (config.verbose) {\n   110→        console.error(\n   111→          `\\n[Tracking] Execution ${currentExecutionRecord.uuid} marked as completed (${signal}, exit code: ${exitCode})`\n   112→        );\n   113→      }\n   114→    } catch (err) {\n   115→      if (config.verbose) {\n   116→        console.error(\n   117→          `[Tracking] Warning: Could not save execution record on ${signal}: ${err.message}`\n   118→        );\n   119→      }\n   120→    }\n   121→    // Clear the reference to prevent double cleanup\n   122→    currentExecutionRecord = null;\n   123→  }\n   124→}\n   125→\n   126→// Set up signal handlers to ensure execution status is updated on interruption\n   127→// SIGINT (Ctrl+C) - exit code 130 (128 + signal number 2)\n   128→process.on('SIGINT', () => {\n   129→  cleanupExecution('SIGINT', 130);\n   130→  process.exit(130);\n   131→});\n   132→\n   133→// SIGTERM (kill command) - exit code 143 (128 + signal number 15)\n   134→process.on('SIGTERM', () => {\n   135→  cleanupExecution('SIGTERM', 143);\n   136→  process.exit(143);\n   137→});\n   138→\n   139→// SIGHUP (terminal closed) - exit code 129 (128 + signal number 1)\n   140→process.on('SIGHUP', () => {\n   141→  cleanupExecution('SIGHUP', 129);\n   142→  process.exit(129);\n   143→});\n   144→\n   145→// Get all arguments passed after the command\n   146→const args = process.argv.slice(2);\n   147→\n   148→// Handle --version flag\n   149→// Support: $ --version, $ -v, $ --version --\n   150→// The trailing -- should be ignored for version check\n   151→// Also support --verbose flag for debugging: $ --version --verbose\n   152→const hasVersionFlag =\n   153→  args.length >= 1 && (args[0] === '--version' || args[0] === '-v');\n   154→\n   155→// Check for --verbose flag in version context\n   156→const hasVerboseWithVersion =\n   157→  hasVersionFlag &&\n   158→  args.some((arg) => arg === '--verbose' || arg === '--debug');\n   159→\n   160→// Determine if this is a version-only call\n   161→// Allow: --version, -v, --version --, --version --verbose, etc.\n   162→const versionRelatedArgs = ['--version', '-v', '--', '--verbose', '--debug'];\n   163→const isVersionOnly =\n   164→  hasVersionFlag &&\n   165→  args.every(\n   166→    (arg) => versionRelatedArgs.includes(arg) || arg === args[0] // Allow the version flag itself\n   167→  );\n   168→\n   169→if (hasVersionFlag && isVersionOnly) {\n   170→  printVersion(hasVerboseWithVersion || config.verbose);\n   171→  process.exit(0);\n   172→}\n   173→\n   174→if (args.length === 0) {\n   175→  printUsage();\n   176→  process.exit(0);\n   177→}\n   178→\n   179→// Parse wrapper options and command\n   180→let parsedArgs;\n   181→try {\n   182→  parsedArgs = parseArgs(args);\n   183→} catch (err) {\n   184→  console.error(`Error: ${err.message}`);\n   185→  process.exit(1);\n   186→}\n   187→\n   188→const { wrapperOptions, command: parsedCommand } = parsedArgs;\n   189→\n   190→// Handle --status flag\n   191→if (wrapperOptions.status) {\n   192→  handleStatusQuery(wrapperOptions.status, wrapperOptions.outputFormat);\n   193→  process.exit(0);\n   194→}\n   195→\n   196→// Handle --cleanup flag\n   197→if (wrapperOptions.cleanup) {\n   198→  handleCleanup(wrapperOptions.cleanupDryRun);\n   199→  process.exit(0);\n   200→}\n   201→\n   202→// Check if no command was provided\n   203→if (!parsedCommand || parsedCommand.trim() === '') {\n   204→  console.error('Error: No command provided');\n   205→  printUsage();\n   206→  process.exit(1);\n   207→}\n   208→\n   209→// Process through substitution engine (unless disabled)\n   210→let command = parsedCommand;\n   211→let substitutionResult = null;\n   212→\n   213→if (!config.disableSubstitutions) {\n   214→  substitutionResult = processCommand(parsedCommand, {\n   215→    customLinoPath: config.substitutionsPath,\n   216→    verbose: config.verbose,\n   217→  });\n   218→\n   219→  if (substitutionResult.matched) {\n   220→    command = substitutionResult.command;\n   221→    if (config.verbose) {\n   222→      console.log(`[Substitution] \"${parsedCommand}\" -> \"${command}\"`);\n   223→      console.log('');\n   224→    }\n   225→  }\n   226→}\n   227→\n   228→// Determine if we should use command-stream\n   229→// Can be enabled via --use-command-stream flag or START_USE_COMMAND_STREAM env var\n   230→const useCommandStream =\n   231→  wrapperOptions.useCommandStream || config.useCommandStream;\n   232→\n   233→// Generate session ID if not provided (auto-generate UUID)\n   234→const sessionId = wrapperOptions.sessionId || generateUUID();\n   235→\n   236→// Main execution\n   237→(async () => {\n   238→  // Check if running in isolation mode or with user isolation\n   239→  if (hasIsolation(wrapperOptions) || wrapperOptions.user) {\n   240→    await runWithIsolation(\n   241→      wrapperOptions,\n   242→      command,\n   243→      useCommandStream,\n   244→      sessionId\n   245→    );\n   246→  } else {\n   247→    if (useCommandStream) {\n   248→      await runDirectWithCommandStream(\n   249→        command,\n   250→        parsedCommand,\n   251→        substitutionResult,\n   252→        sessionId\n   253→      );\n   254→    } else {\n   255→      await runDirect(command, sessionId);\n   256→    }\n   257→  }\n   258→})();\n   259→\n   260→function handleStatusQuery(uuid, outputFormat) {\n   261→  const result = queryStatus(getExecutionStore(), uuid, outputFormat);\n   262→  if (result.success) {\n   263→    console.log(result.output);\n   264→  } else {\n   265→    console.error(`Error: ${result.error}`);\n   266→    process.exit(1);\n   267→  }\n   268→}\n   269→\n   270→/**\n   271→ * Handle --cleanup flag\n   272→ * Cleans up stale \"executing\" records (processes that crashed or were killed)\n   273→ * @param {boolean} dryRun - If true, just report what would be cleaned\n   274→ */\n   275→function handleCleanup(dryRun) {\n   276→  const store = getExecutionStore();\n   277→  if (!store) {\n   278→    console.error('Error: Execution tracking is disabled.');\n   279→    process.exit(1);\n   280→  }\n   281→\n   282→  const result = store.cleanupStale({ dryRun });\n   283→\n   284→  if (result.errors.length > 0) {\n   285→    for (const error of result.errors) {\n   286→      console.error(`Error: ${error}`);\n   287→    }\n   288→  }\n   289→\n   290→  if (result.records.length === 0) {\n   291→    console.log('No stale records found.');\n   292→    return;\n   293→  }\n   294→\n   295→  if (dryRun) {\n   296→    console.log(\n   297→      `Found ${result.records.length} stale record(s) that would be cleaned up:\\n`\n   298→    );\n   299→  } else {\n   300→    console.log(`Cleaned up ${result.cleaned} stale record(s):\\n`);\n   301→  }\n   302→\n   303→  for (const record of result.records) {\n   304→    const startTime = new Date(record.startTime).toLocaleString();\n   305→    console.log(`  UUID: ${record.uuid}`);\n   306→    console.log(`  Command: ${record.command}`);\n   307→    console.log(`  Started: ${startTime}`);\n   308→    console.log(`  PID: ${record.pid || 'N/A'}`);\n   309→    console.log('');\n   310→  }\n   311→\n   312→  if (dryRun) {\n   313→    console.log('Run with --cleanup to actually clean up these records.');\n   314→  }\n   315→}\n   316→\n   317→/** Print usage information */\n   318→function printUsage() {\n   319→  console.log(`Usage: $ [options] [--] <command> | $ --status <uuid> [--output-format <fmt>]\n   320→\n   321→Options:\n   322→  --isolated, -i <env>  Run in isolated environment (screen, tmux, docker, ssh)\n   323→  --attached, -a        Run in attached mode (foreground)\n   324→  --detached, -d        Run in detached mode (background)\n   325→  --session, -s <name>  Session name for isolation\n   326→  --session-id <uuid>   Session UUID for tracking (auto-generated if not provided)\n   327→  --session-name <uuid> Alias for --session-id\n   328→  --image <image>       Docker image (required for docker isolation)\n   329→  --endpoint <endpoint> SSH endpoint (required for ssh isolation, e.g., user@host)\n   330→  --isolated-user, -u [name]  Create isolated user with same permissions\n   331→  --keep-user           Keep isolated user after command completes\n   332→  --keep-alive, -k      Keep isolation environment alive after command exits\n   333→  --auto-remove-docker-container  Auto-remove docker container after exit\n   334→  --shell <shell>       Shell to use in isolation environments: auto, bash, zsh, sh (default: auto)\n   335→  --use-command-stream  Use command-stream library for execution (experimental)\n   336→  --status <uuid>       Show status of execution by UUID (--output-format: links-notation|json|text)\n   337→  --cleanup             Clean up stale \"executing\" records (crashed/killed processes)\n   338→  --cleanup-dry-run     Show stale records that would be cleaned up (without cleaning)\n   339→  --version, -v         Show version information\n   340→\n   341→Examples:\n   342→  $ echo \"Hello World\"\n   343→  $ bun test\n   344→  $ --isolated tmux -- bun start\n   345→  $ -i screen -d bun start\n   346→  $ --isolated docker --image oven/bun:latest -- bun install\n   347→  $ --isolated ssh --endpoint user@remote.server -- ls -la\n   348→  $ --isolated-user -- npm test            # Create isolated user\n   349→  $ -u myuser -- npm start                 # Custom username\n   350→  $ -i screen --isolated-user -- npm test  # Combine with process isolation\n   351→  $ --isolated-user --keep-user -- npm start\n   352→  $ --use-command-stream echo \"Hello\"      # Use command-stream library`);\n   353→  console.log('');\n   354→  console.log('Piping with $:');\n   355→  console.log('  echo \"hi\" | $ agent       # Preferred - pipe TO $ command');\n   356→  console.log(\n   357→    '  $ \\'echo \"hi\" | agent\\'   # Alternative - quote entire pipeline'\n   358→  );\n   359→  console.log('');\n   360→  console.log('Quoting for special characters:');\n   361→  console.log(\"  $ 'npm test && npm build' # Wrap for logical operators\");\n   362→  console.log(\"  $ 'cat file > output.txt' # Wrap for redirections\");\n   363→  console.log('');\n   364→  console.log('Features:');\n   365→  console.log('  - Logs all output to temporary directory');\n   366→  console.log('  - Displays timestamps and exit codes');\n   367→  console.log(\n   368→    '  - Auto-reports failures for NPM packages (when gh is available)'\n   369→  );\n   370→  console.log('  - Natural language command aliases (via substitutions.lino)');\n   371→  console.log('  - Process isolation via screen, tmux, or docker');\n   372→  console.log('');\n   373→  console.log('Alias examples:');\n   374→  console.log('  $ install lodash npm package           -> npm install lodash');\n   375→  console.log(\n   376→    '  $ install 4.17.21 version of lodash npm package -> npm install lodash@4.17.21'\n   377→  );\n   378→  console.log(\n   379→    '  $ clone https://github.com/user/repo repository -> git clone https://github.com/user/repo'\n   380→  );\n   381→}\n   382→\n   383→/**\n   384→ * Run command in isolation mode\n   385→ * @param {object} options - Wrapper options\n   386→ * @param {string} cmd - Command to execute\n   387→ * @param {boolean} useCommandStream - Whether to use command-stream for isolation\n   388→ * @param {string} sessionId - Session UUID for tracking\n   389→ */\n   390→async function runWithIsolation(\n   391→  options,\n   392→  cmd,\n   393→  useCommandStream = false,\n   394→  sessionId\n   395→) {\n   396→  const environment = options.isolated;\n   397→  const mode = getEffectiveMode(options);\n   398→  const startTime = getTimestamp();\n   399→  const startTimeMs = Date.now();\n   400→\n   401→  // Use default Docker image if docker isolation is selected but no image specified\n   402→  let effectiveImage = options.image;\n   403→  if (environment === 'docker' && !effectiveImage) {\n   404→    effectiveImage = getDefaultDockerImage();\n   405→  }\n   406→\n   407→  // Create log file path\n   408→  const logFilePath = createLogPath(environment || 'direct');\n   409→\n   410→  // Get session name (will be generated by runIsolated if not provided)\n   411→  const sessionName =\n   412→    options.session ||\n   413→    `${environment || 'start'}-${Date.now()}-${Math.random().toString(36).substring(2, 8)}`;\n   414→\n   415→  // Determine the shell\n   416→  const isWindows = process.platform === 'win32';\n   417→  const shell = isWindows ? 'powershell.exe' : process.env.SHELL || '/bin/sh';\n   418→\n   419→  // Collect isolation info lines for start block\n   420→  const extraLines = [];\n   421→\n   422→  // Handle --isolated-user option: create a new user with same permissions\n   423→  let createdUser = null;\n   424→\n   425→  if (options.user) {\n   426→    // Check for sudo access\n   427→    if (!hasSudoAccess()) {\n   428→      console.error(\n   429→        'Error: --isolated-user requires sudo access without password.'\n   430→      );\n   431→      console.error(\n   432→        'Configure NOPASSWD in sudoers or run with appropriate permissions.'\n   433→      );\n   434→      process.exit(1);\n   435→    }\n   436→\n   437→    // Get current user groups to show what will be inherited\n   438→    const currentGroups = getCurrentUserGroups();\n   439→    const importantGroups = ['sudo', 'docker', 'wheel', 'admin'].filter((g) =>\n   440→      currentGroups.includes(g)\n   441→    );\n   442→\n   443→    extraLines.push('[User Isolation] Creating new user...');\n   444→    if (importantGroups.length > 0) {\n   445→      extraLines.push(\n   446→        `[User Isolation] Inheriting groups: ${importantGroups.join(', ')}`\n   447→      );\n   448→    }\n   449→\n   450→    // Create the isolated user\n   451→    const userResult = createIsolatedUser(options.userName);\n   452→    if (!userResult.success) {\n   453→      console.error(\n   454→        `Error: Failed to create isolated user: ${userResult.message}`\n   455→      );\n   456→      process.exit(1);\n   457→    }\n   458→\n   459→    createdUser = userResult.username;\n   460→    extraLines.push(`[User Isolation] Created user: ${createdUser}`);\n   461→    if (userResult.groups && userResult.groups.length > 0) {\n   462→      extraLines.push(\n   463→        `[User Isolation] User groups: ${userResult.groups.join(', ')}`\n   464→      );\n   465→    }\n   466→    if (options.keepUser) {\n   467→      extraLines.push('[User Isolation] User will be kept after completion');\n   468→    }\n   469→  }\n   470→\n   471→  // Add isolation info to extra lines\n   472→  if (environment) {\n   473→    extraLines.push(`[Isolation] Environment: ${environment}, Mode: ${mode}`);\n   474→    // Always add the session name so users can reconnect to detached sessions\n   475→    // This is important for screen, tmux, docker where the session/container name\n   476→    // is different from the session UUID used for tracking (see issue #67)\n   477→    extraLines.push(`[Isolation] Session: ${sessionName}`);\n   478→  }\n   479→  if (effectiveImage) {\n   480→    extraLines.push(`[Isolation] Image: ${effectiveImage}`);\n   481→  }\n   482→  if (options.endpoint) {\n   483→    extraLines.push(`[Isolation] Endpoint: ${options.endpoint}`);\n   484→  }\n   485→  if (createdUser) {\n   486→    extraLines.push(`[Isolation] User: ${createdUser} (isolated)`);\n   487→  }\n   488→  if (useCommandStream) {\n   489→    extraLines.push('[Isolation] Using command-stream library');\n   490→  }\n   491→\n   492→  // Create execution record for tracking with provided session ID\n   493→  let executionRecord = null;\n   494→  const store = getExecutionStore();\n   495→  if (store) {\n   496→    executionRecord = new ExecutionRecord({\n   497→      uuid: sessionId, // Use the provided session ID\n   498→      command: cmd,\n   499→      logPath: logFilePath,\n   500→      shell,\n   501→      workingDirectory: process.cwd(),\n   502→      options: {\n   503→        isolated: environment,\n   504→        isolationMode: mode,\n   505→        sessionName,\n   506→        image: effectiveImage,\n   507→        endpoint: options.endpoint,\n   508→        user: options.user,\n   509→        keepAlive: options.keepAlive,\n   510→        useCommandStream,\n   511→      },\n   512→    });\n   513→  }\n   514→\n   515→  // Print start block with session ID and isolation info\n   516→  // For docker isolation, defer command printing to allow virtual commands (like docker pull) to be shown first\n   517→  const deferCommand = environment === 'docker';\n   518→  console.log(\n   519→    createStartBlock({\n   520→      sessionId,\n   521→      timestamp: startTime,\n   522→      command: cmd,\n   523→      extraLines,\n   524→      deferCommand,\n   525→    })\n   526→  );\n   527→  // Only print empty line when not deferring command (docker isolation handles its own spacing)\n   528→  if (!deferCommand) {\n   529→    console.log('');\n   530→  }\n   531→\n   532→  // Save initial execution record and set global reference for signal cleanup\n   533→  if (executionRecord && store) {\n   534→    currentExecutionRecord = executionRecord;\n   535→    try {\n   536→      store.save(executionRecord);\n   537→    } catch (err) {\n   538→      if (config.verbose) {\n   539→        console.error(\n   540→          `[Tracking] Warning: Could not save execution record: ${err.message}`\n   541→        );\n   542→      }\n   543→    }\n   544→  }\n   545→\n   546→  // Create log content\n   547→  let logContent = createLogHeader({\n   548→    command: cmd,\n   549→    environment: environment || 'direct',\n   550→    mode,\n   551→    sessionName,\n   552→    image: effectiveImage,\n   553→    user: createdUser,\n   554→    startTime,\n   555→  });\n   556→\n   557→  // Add execution ID to log content\n   558→  if (executionRecord) {\n   559→    logContent = logContent.replace(\n   560→      '=== Start Command Log ===\\n',\n   561→      `=== Start Command Log ===\\nExecution ID: ${executionRecord.uuid}\\n`\n   562→    );\n   563→  }\n   564→\n   565→  let result;\n   566→\n   567→  if (environment) {\n   568→    // Run in isolation environment (screen, tmux, docker, ssh)\n   569→    // Note: Isolation environments currently use native spawn/execSync\n   570→    // Future: Add command-stream support with raw() function for multiplexers\n   571→    result = await runIsolated(environment, cmd, {\n   572→      session: options.session,\n   573→      image: effectiveImage,\n   574→      endpoint: options.endpoint,\n   575→      detached: mode === 'detached',\n   576→      user: createdUser,\n   577→      keepAlive: options.keepAlive,\n   578→      autoRemoveDockerContainer: options.autoRemoveDockerContainer,\n   579→      shell: options.shell,\n   580→    });\n   581→  } else if (createdUser) {\n   582→    // Run directly as the created user (no isolation environment)\n   583→    result = await runAsIsolatedUser(cmd, createdUser);\n   584→  } else {\n   585→    // This shouldn't happen in isolation mode, but handle gracefully\n   586→    result = { success: false, message: 'No isolation configuration provided' };\n   587→  }\n   588→\n   589→  // Get exit code\n   590→  const exitCode =\n   591→    result.exitCode !== undefined ? result.exitCode : result.success ? 0 : 1;\n   592→  const endTime = getTimestamp();\n   593→\n   594→  // Print failure message to stderr so user sees why isolation failed (e.g. Docker not installed)\n   595→  if (!result.success && result.message) {\n   596→    console.error(`Error: ${result.message}`);\n   597→  }\n   598→  // Add result to log content\n   599→  logContent += `${result.message}\\n`;\n   600→  logContent += createLogFooter(endTime, exitCode);\n   601→\n   602→  // Write log file\n   603→  writeLogFile(logFilePath, logContent);\n   604→\n   605→  // Update execution record as completed and clear global reference\n   606→  if (executionRecord && store) {\n   607→    executionRecord.complete(exitCode);\n   608→    try {\n   609→      store.save(executionRecord);\n   610→    } catch (err) {\n   611→      if (config.verbose) {\n   612→        console.error(\n   613→          `[Tracking] Warning: Could not update execution record: ${err.message}`\n   614→        );\n   615→      }\n   616→    }\n   617→    // Clear global reference since we've completed normally\n   618→    currentExecutionRecord = null;\n   619→  }\n   620→\n   621→  // Cleanup: delete the created user if we created one (unless --keep-user)\n   622→  // This output goes to stdout but NOT inside the boxes - it's operational info\n   623→  if (createdUser && !options.keepUser) {\n   624→    console.log(`[User Isolation] Cleaning up user: ${createdUser}`);\n   625→    const deleteResult = deleteUser(createdUser, { removeHome: true });\n   626→    if (deleteResult.success) {\n   627→      console.log('[User Isolation] User deleted successfully');\n   628→    } else {\n   629→      console.log(`[User Isolation] Warning: ${deleteResult.message}`);\n   630→    }\n   631→    console.log('');\n   632→  } else if (createdUser && options.keepUser) {\n   633→    console.log(\n   634→      `[User Isolation] Keeping user: ${createdUser} (use 'sudo userdel -r ${createdUser}' to delete)`\n   635→    );\n   636→    console.log('');\n   637→  }\n   638→\n   639→  // Print finish block with isolation metadata repeated\n   640→  // Add empty line before finish block for visual separation\n   641→  console.log('');\n   642→  const durationMs = Date.now() - startTimeMs;\n   643→  console.log(\n   644→    createFinishBlock({\n   645→      sessionId,\n   646→      timestamp: endTime,\n   647→      exitCode,\n   648→      logPath: logFilePath,\n   649→      durationMs,\n   650→      extraLines, // Pass extraLines for isolation metadata repetition in footer\n   651→    })\n   652→  );\n   653→\n   654→  process.exit(exitCode);\n   655→}\n   656→\n   657→/**\n   658→ * Run command directly (without isolation)\n   659→ *\n   660→ * Uses Bun.spawn when running on Bun for reliable event handling on macOS.\n   661→ * Falls back to node:child_process for Node.js compatibility.\n   662→ *\n   663→ * Issue #57: On macOS with Bun, node:child_process events may not fire reliably\n   664→ * before the event loop exits. Bun.spawn provides more reliable stream handling.\n   665→ *\n   666→ * @param {string} cmd - Command to execute\n   667→ * @param {string} sessionId - Session UUID for tracking\n   668→ */\n   669→async function runDirect(cmd, sessionId) {\n   670→  // Get the command name (first word of the actual command to execute)\n   671→  const commandName = cmd.split(' ')[0];\n   672→\n   673→  // Determine the shell based on the platform\n   674→  const isWindows = process.platform === 'win32';\n   675→  const shell = isWindows ? 'powershell.exe' : process.env.SHELL || '/bin/sh';\n   676→  const shellArgs = isWindows ? ['-Command', cmd] : ['-c', cmd];\n   677→\n   678→  // Setup logging\n   679→  const logDir = config.logDir || os.tmpdir();\n   680→  const logFilename = generateLogFilename();\n   681→  const logFilePath = path.join(logDir, logFilename);\n   682→\n   683→  let logContent = '';\n   684→  const startTime = getTimestamp();\n   685→  const startTimeMs = Date.now();\n   686→\n   687→  // Get runtime information\n   688→  const runtime = typeof Bun !== 'undefined' ? 'Bun' : 'Node.js';\n   689→  const runtimeVersion =\n   690→    typeof Bun !== 'undefined' ? Bun.version : process.version;\n   691→\n   692→  // Create execution record for tracking with provided session ID\n   693→  let executionRecord = null;\n   694→  const store = getExecutionStore();\n   695→  if (store) {\n   696→    executionRecord = new ExecutionRecord({\n   697→      uuid: sessionId, // Use the provided session ID\n   698→      command: cmd,\n   699→      logPath: logFilePath,\n   700→      shell,\n   701→      workingDirectory: process.cwd(),\n   702→      options: {\n   703→        substitutionMatched: substitutionResult?.matched || false,\n   704→        originalCommand: substitutionResult?.matched ? parsedCommand : null,\n   705→        runtime,\n   706→        runtimeVersion,\n   707→      },\n   708→    });\n   709→    // Set global reference for signal cleanup\n   710→    currentExecutionRecord = executionRecord;\n   711→  }\n   712→\n   713→  // Log header\n   714→  logContent += `=== Start Command Log ===\\n`;\n   715→  logContent += `Timestamp: ${startTime}\\n`;\n   716→  logContent += `Session ID: ${sessionId}\\n`;\n   717→  if (substitutionResult && substitutionResult.matched) {\n   718→    logContent += `Original Input: ${parsedCommand}\\n`;\n   719→    logContent += `Substituted Command: ${cmd}\\n`;\n   720→    logContent += `Pattern Matched: ${substitutionResult.rule.pattern}\\n`;\n   721→  } else {\n   722→    logContent += `Command: ${cmd}\\n`;\n   723→  }\n   724→  logContent += `Shell: ${shell}\\n`;\n   725→  logContent += `Platform: ${process.platform}\\n`;\n   726→  logContent += `${runtime} Version: ${runtimeVersion}\\n`;\n   727→  logContent += `Working Directory: ${process.cwd()}\\n`;\n   728→  logContent += `${'='.repeat(50)}\\n\\n`;\n   729→\n   730→  // Print start block with session ID\n   731→  const displayCommand =\n   732→    substitutionResult && substitutionResult.matched\n   733→      ? `${parsedCommand} -> ${cmd}`\n   734→      : cmd;\n   735→  console.log(\n   736→    createStartBlock({\n   737→      sessionId,\n   738→      timestamp: startTime,\n   739→      command: displayCommand,\n   740→    })\n   741→  );\n   742→  console.log('');\n   743→\n   744→  // Completion callback\n   745→  const onComplete = (exitCode, endTime, _logContent, durationMs) => {\n   746→    // Clear global reference since execution completed normally\n   747→    currentExecutionRecord = null;\n   748→    console.log('');\n   749→    console.log(\n   750→      createFinishBlock({\n   751→        sessionId,\n   752→        timestamp: endTime,\n   753→        exitCode,\n   754→        logPath: logFilePath,\n   755→        durationMs,\n   756→      })\n   757→    );\n   758→    if (exitCode !== 0) {\n   759→      handleFailure(config, commandName, cmd, exitCode, logFilePath);\n   760→    }\n   761→    process.exit(exitCode);\n   762→  };\n   763→\n   764→  // Error callback\n   765→  const onError = (errorMessage, endTime, durationMs) => {\n   766→    // Clear global reference since execution completed (with error)\n   767→    currentExecutionRecord = null;\n   768→    console.error(`\\n${errorMessage}`);\n   769→    console.log('');\n   770→    console.log(\n   771→      createFinishBlock({\n   772→        sessionId,\n   773→        timestamp: endTime,\n   774→        exitCode: 1,\n   775→        logPath: logFilePath,\n   776→        durationMs,\n   777→      })\n   778→    );\n   779→    handleFailure(config, commandName, cmd, 1, logFilePath);\n   780→    process.exit(1);\n   781→  };\n   782→\n   783→  // Use Bun.spawn when running on Bun for reliable event handling on macOS\n   784→  // Fall back to node:child_process for Node.js compatibility\n   785→  const spawnOptions = {\n   786→    shell,\n   787→    shellArgs,\n   788→    logFilePath,\n   789→    logContent,\n   790→    startTimeMs,\n   791→    executionRecord,\n   792→    store,\n   793→    config,\n   794→    onComplete,\n   795→    onError,\n   796→  };\n   797→\n   798→  if (typeof Bun !== 'undefined') {\n   799→    await runWithBunSpawn(spawnOptions);\n   800→  } else {\n   801→    runWithNodeSpawn(spawnOptions);\n   802→  }\n   803→}\n   804→\n   805→/**\n   806→ * Run command directly using command-stream library (experimental)\n   807→ * @param {string} cmd - Command to execute\n   808→ * @param {string} parsedCmd - Original parsed command\n   809→ * @param {object} subResult - Result from substitution engine\n   810→ * @param {string} sessionId - Session UUID for tracking\n   811→ */\n   812→async function runDirectWithCommandStream(\n   813→  cmd,\n   814→  parsedCmd,\n   815→  subResult,\n   816→  sessionId\n   817→) {\n   818→  // Lazy load command-stream\n   819→  const { getCommandStream } = require('../lib/command-stream');\n   820→  const { $, raw } = await getCommandStream();\n   821→\n   822→  // Get the command name (first word of the actual command to execute)\n   823→  const commandName = cmd.split(' ')[0];\n   824→\n   825→  // Determine the shell based on the platform\n   826→  const isWindows = process.platform === 'win32';\n   827→  const shell = isWindows ? 'powershell.exe' : process.env.SHELL || '/bin/sh';\n   828→\n   829→  // Setup logging\n   830→  const logDir = config.logDir || os.tmpdir();\n   831→  const logFilename = generateLogFilename();\n   832→  const logFilePath = path.join(logDir, logFilename);\n   833→\n   834→  let logContent = '';\n   835→  const startTime = getTimestamp();\n   836→  const startTimeMs = Date.now();\n   837→\n   838→  // Get runtime information\n   839→  const runtime = typeof Bun !== 'undefined' ? 'Bun' : 'Node.js';\n   840→  const runtimeVersion =\n   841→    typeof Bun !== 'undefined' ? Bun.version : process.version;\n   842→\n   843→  // Create execution record for tracking with provided session ID\n   844→  let executionRecord = null;\n   845→  const store = getExecutionStore();\n   846→  if (store) {\n   847→    executionRecord = new ExecutionRecord({\n   848→      uuid: sessionId, // Use the provided session ID\n   849→      command: cmd,\n   850→      logPath: logFilePath,\n   851→      shell,\n   852→      workingDirectory: process.cwd(),\n   853→      options: {\n   854→        substitutionMatched: subResult?.matched || false,\n   855→        originalCommand: subResult?.matched ? parsedCmd : null,\n   856→        runtime,\n   857→        runtimeVersion,\n   858→        executionMode: 'command-stream',\n   859→      },\n   860→    });\n   861→    // Set global reference for signal cleanup\n   862→    currentExecutionRecord = executionRecord;\n   863→  }\n   864→\n   865→  // Log header\n   866→  logContent += `=== Start Command Log ===\\n`;\n   867→  logContent += `Timestamp: ${startTime}\\n`;\n   868→  logContent += `Session ID: ${sessionId}\\n`;\n   869→  logContent += `Execution Mode: command-stream\\n`;\n   870→  if (subResult && subResult.matched) {\n   871→    logContent += `Original Input: ${parsedCmd}\\n`;\n   872→    logContent += `Substituted Command: ${cmd}\\n`;\n   873→    logContent += `Pattern Matched: ${subResult.rule.pattern}\\n`;\n   874→  } else {\n   875→    logContent += `Command: ${cmd}\\n`;\n   876→  }\n   877→  logContent += `Shell: ${shell}\\n`;\n   878→  logContent += `Platform: ${process.platform}\\n`;\n   879→  logContent += `${runtime} Version: ${runtimeVersion}\\n`;\n   880→  logContent += `Working Directory: ${process.cwd()}\\n`;\n   881→  logContent += `${'='.repeat(50)}\\n\\n`;\n   882→\n   883→  // Print start block with session ID\n   884→  const displayCmd =\n   885→    subResult && subResult.matched ? `${parsedCmd} -> ${cmd}` : cmd;\n   886→  console.log(\n   887→    createStartBlock({\n   888→      sessionId,\n   889→      timestamp: startTime,\n   890→      command: displayCmd,\n   891→    })\n   892→  );\n   893→  console.log('[command-stream] Using command-stream library');\n   894→  console.log('');\n   895→\n   896→  // Save initial execution record (PID will be updated later if available)\n   897→  if (executionRecord && store) {\n   898→    try {\n   899→      store.save(executionRecord);\n   900→    } catch (err) {\n   901→      if (config.verbose) {\n   902→        console.error(\n   903→          `[Tracking] Warning: Could not save execution record: ${err.message}`\n   904→        );\n   905→      }\n   906→    }\n   907→  }\n   908→\n   909→  // Execute the command using command-stream with real-time output\n   910→  // Using mirror: true to show output in real-time, capture: true to collect it\n   911→  // Using raw() to avoid auto-escaping that might interfere with complex shell commands\n   912→  const $cmd = $({ mirror: true, capture: true });\n   913→\n   914→  let exitCode = 0;\n   915→  try {\n   916→    // Use raw() to pass the command without auto-escaping\n   917→    // This is important for complex commands with pipes, redirects, etc.\n   918→    const result = await $cmd`${raw(cmd)}`;\n   919→    exitCode = result.code || 0;\n   920→\n   921→    // Update PID if available from result\n   922→    if (executionRecord && result.pid) {\n   923→      executionRecord.pid = result.pid;\n   924→    }\n   925→\n   926→    // Collect output for log\n   927→    if (result.stdout) {\n   928→      logContent += result.stdout;\n   929→    }\n   930→    if (result.stderr) {\n   931→      logContent += result.stderr;\n   932→    }\n   933→  } catch (err) {\n   934→    exitCode = err.code || 1;\n   935→    const errorMessage = `Error executing command: ${err.message}`;\n   936→    logContent += `\\n${errorMessage}\\n`;\n   937→    console.error(`\\n${errorMessage}`);\n   938→  }\n   939→\n   940→  const endTime = getTimestamp();\n   941→\n   942→  // Log footer\n   943→  logContent += `\\n${'='.repeat(50)}\\n`;\n   944→  logContent += `Finished: ${endTime}\\n`;\n   945→  logContent += `Exit Code: ${exitCode}\\n`;\n   946→\n   947→  // Write log file\n   948→  try {\n   949→    fs.writeFileSync(logFilePath, logContent, 'utf8');\n   950→  } catch (err) {\n   951→    console.error(`\\nWarning: Could not save log file: ${err.message}`);\n   952→  }\n   953→\n   954→  // Update execution record as completed and clear global reference\n   955→  if (executionRecord && store) {\n   956→    executionRecord.complete(exitCode);\n   957→    try {\n   958→      store.save(executionRecord);\n   959→    } catch (err) {\n   960→      if (config.verbose) {\n   961→        console.error(\n   962→          `[Tracking] Warning: Could not update execution record: ${err.message}`\n   963→        );\n   964→      }\n   965→    }\n   966→    // Clear global reference since we've completed normally\n   967→    currentExecutionRecord = null;\n   968→  }\n   969→\n   970→  // Print finish block\n   971→  const durationMs = Date.now() - startTimeMs;\n   972→  console.log('');\n   973→  console.log(\n   974→    createFinishBlock({\n   975→      sessionId,\n   976→      timestamp: endTime,\n   977→      exitCode,\n   978→      logPath: logFilePath,\n   979→      durationMs,\n   980→    })\n   981→  );\n   982→\n   983→  // If command failed, try to auto-report\n   984→  if (exitCode !== 0) {\n   985→    handleFailure(config, commandName, cmd, exitCode, logFilePath);\n   986→  }\n   987→\n   988→  process.exit(exitCode);\n   989→}\n   990→\n   991→/**\n   992→ * Generate unique log filename for direct execution\n   993→ * @returns {string} Log filename\n   994→ */\n   995→function generateLogFilename() {\n   996→  const timestamp = Date.now();\n   997→  const random = Math.random().toString(36).substring(2, 8);\n   998→  return `start-command-${timestamp}-${random}.log`;\n   999→}\n  1000→"
      }
    ]
  },
  "parent_tool_use_id": null,
  "session_id": "914de587-6218-4c93-b322-d791963b9891",
  "uuid": "b8b8e3d1-f0a6-45e9-8632-0be392b02921",
  "tool_use_result": {
    "type": "text",
    "file": {
      "filePath": "/tmp/gh-issue-solver-1773494815317/js/src/bin/cli.js",
      "content": "#!/usr/bin/env bun\n\nconst process = require('process');\nconst os = require('os');\nconst fs = require('fs');\nconst path = require('path');\n\n// Import modules\nconst { processCommand } = require('../lib/substitution');\nconst {\n  parseArgs,\n  hasIsolation,\n  getEffectiveMode,\n  generateUUID,\n} = require('../lib/args-parser');\nconst {\n  runIsolated,\n  runAsIsolatedUser,\n  getTimestamp,\n  createLogHeader,\n  createLogFooter,\n  writeLogFile,\n  createLogPath,\n  getDefaultDockerImage,\n} = require('../lib/isolation');\nconst {\n  createIsolatedUser,\n  deleteUser,\n  hasSudoAccess,\n  getCurrentUserGroups,\n} = require('../lib/user-manager');\nconst { handleFailure } = require('../lib/failure-handler');\nconst { ExecutionStore, ExecutionRecord } = require('../lib/execution-store');\nconst { queryStatus } = require('../lib/status-formatter');\nconst { printVersion } = require('../lib/version');\nconst { createStartBlock, createFinishBlock } = require('../lib/output-blocks');\nconst { runWithBunSpawn, runWithNodeSpawn } = require('../lib/spawn-helpers');\n\n// Configuration from environment variables\nconst config = {\n  // Disable automatic issue creation (useful for testing)\n  disableAutoIssue:\n    process.env.START_DISABLE_AUTO_ISSUE === '1' ||\n    process.env.START_DISABLE_AUTO_ISSUE === 'true',\n  // Disable log upload\n  disableLogUpload:\n    process.env.START_DISABLE_LOG_UPLOAD === '1' ||\n    process.env.START_DISABLE_LOG_UPLOAD === 'true',\n  // Custom log directory (defaults to OS temp)\n  logDir: process.env.START_LOG_DIR || null,\n  // Verbose mode\n  verbose:\n    process.env.START_VERBOSE === '1' || process.env.START_VERBOSE === 'true',\n  // Disable substitutions/aliases\n  disableSubstitutions:\n    process.env.START_DISABLE_SUBSTITUTIONS === '1' ||\n    process.env.START_DISABLE_SUBSTITUTIONS === 'true',\n  // Custom substitutions file path\n  substitutionsPath: process.env.START_SUBSTITUTIONS_PATH || null,\n  // Use command-stream library for command execution (experimental)\n  useCommandStream:\n    process.env.START_USE_COMMAND_STREAM === '1' ||\n    process.env.START_USE_COMMAND_STREAM === 'true',\n  // Disable execution tracking\n  disableTracking:\n    process.env.START_DISABLE_TRACKING === '1' ||\n    process.env.START_DISABLE_TRACKING === 'true',\n  // Custom app folder for storing execution records (defaults to ~/.start-command)\n  appFolder:\n    process.env.START_APP_FOLDER || path.join(os.homedir(), '.start-command'),\n};\n\n// Global execution store instance (initialized lazily)\nlet executionStore = null;\n\n// Global reference to current execution record for cleanup on signals\n// This allows us to mark the execution as completed if the process is interrupted\nlet currentExecutionRecord = null;\n\n/**\n * Get the execution store instance\n * @returns {ExecutionStore}\n */\nfunction getExecutionStore() {\n  if (!executionStore && !config.disableTracking) {\n    executionStore = new ExecutionStore({\n      appFolder: config.appFolder || undefined,\n      verbose: config.verbose,\n    });\n  }\n  return executionStore;\n}\n\n/**\n * Cleanup handler for signals and process exit\n * Marks the current execution as completed with an appropriate exit code\n * @param {string} signal - The signal that triggered the cleanup (e.g., 'SIGINT', 'SIGTERM')\n * @param {number} exitCode - The exit code to use\n */\nfunction cleanupExecution(signal, exitCode) {\n  if (currentExecutionRecord && executionStore) {\n    // Signal-based exit codes:\n    // SIGINT (Ctrl+C): 130 (128 + 2)\n    // SIGTERM: 143 (128 + 15)\n    // SIGHUP: 129 (128 + 1)\n    currentExecutionRecord.complete(exitCode);\n    try {\n      executionStore.save(currentExecutionRecord);\n      if (config.verbose) {\n        console.error(\n          `\\n[Tracking] Execution ${currentExecutionRecord.uuid} marked as completed (${signal}, exit code: ${exitCode})`\n        );\n      }\n    } catch (err) {\n      if (config.verbose) {\n        console.error(\n          `[Tracking] Warning: Could not save execution record on ${signal}: ${err.message}`\n        );\n      }\n    }\n    // Clear the reference to prevent double cleanup\n    currentExecutionRecord = null;\n  }\n}\n\n// Set up signal handlers to ensure execution status is updated on interruption\n// SIGINT (Ctrl+C) - exit code 130 (128 + signal number 2)\nprocess.on('SIGINT', () => {\n  cleanupExecution('SIGINT', 130);\n  process.exit(130);\n});\n\n// SIGTERM (kill command) - exit code 143 (128 + signal number 15)\nprocess.on('SIGTERM', () => {\n  cleanupExecution('SIGTERM', 143);\n  process.exit(143);\n});\n\n// SIGHUP (terminal closed) - exit code 129 (128 + signal number 1)\nprocess.on('SIGHUP', () => {\n  cleanupExecution('SIGHUP', 129);\n  process.exit(129);\n});\n\n// Get all arguments passed after the command\nconst args = process.argv.slice(2);\n\n// Handle --version flag\n// Support: $ --version, $ -v, $ --version --\n// The trailing -- should be ignored for version check\n// Also support --verbose flag for debugging: $ --version --verbose\nconst hasVersionFlag =\n  args.length >= 1 && (args[0] === '--version' || args[0] === '-v');\n\n// Check for --verbose flag in version context\nconst hasVerboseWithVersion =\n  hasVersionFlag &&\n  args.some((arg) => arg === '--verbose' || arg === '--debug');\n\n// Determine if this is a version-only call\n// Allow: --version, -v, --version --, --version --verbose, etc.\nconst versionRelatedArgs = ['--version', '-v', '--', '--verbose', '--debug'];\nconst isVersionOnly =\n  hasVersionFlag &&\n  args.every(\n    (arg) => versionRelatedArgs.includes(arg) || arg === args[0] // Allow the version flag itself\n  );\n\nif (hasVersionFlag && isVersionOnly) {\n  printVersion(hasVerboseWithVersion || config.verbose);\n  process.exit(0);\n}\n\nif (args.length === 0) {\n  printUsage();\n  process.exit(0);\n}\n\n// Parse wrapper options and command\nlet parsedArgs;\ntry {\n  parsedArgs = parseArgs(args);\n} catch (err) {\n  console.error(`Error: ${err.message}`);\n  process.exit(1);\n}\n\nconst { wrapperOptions, command: parsedCommand } = parsedArgs;\n\n// Handle --status flag\nif (wrapperOptions.status) {\n  handleStatusQuery(wrapperOptions.status, wrapperOptions.outputFormat);\n  process.exit(0);\n}\n\n// Handle --cleanup flag\nif (wrapperOptions.cleanup) {\n  handleCleanup(wrapperOptions.cleanupDryRun);\n  process.exit(0);\n}\n\n// Check if no command was provided\nif (!parsedCommand || parsedCommand.trim() === '') {\n  console.error('Error: No command provided');\n  printUsage();\n  process.exit(1);\n}\n\n// Process through substitution engine (unless disabled)\nlet command = parsedCommand;\nlet substitutionResult = null;\n\nif (!config.disableSubstitutions) {\n  substitutionResult = processCommand(parsedCommand, {\n    customLinoPath: config.substitutionsPath,\n    verbose: config.verbose,\n  });\n\n  if (substitutionResult.matched) {\n    command = substitutionResult.command;\n    if (config.verbose) {\n      console.log(`[Substitution] \"${parsedCommand}\" -> \"${command}\"`);\n      console.log('');\n    }\n  }\n}\n\n// Determine if we should use command-stream\n// Can be enabled via --use-command-stream flag or START_USE_COMMAND_STREAM env var\nconst useCommandStream =\n  wrapperOptions.useCommandStream || config.useCommandStream;\n\n// Generate session ID if not provided (auto-generate UUID)\nconst sessionId = wrapperOptions.sessionId || generateUUID();\n\n// Main execution\n(async () => {\n  // Check if running in isolation mode or with user isolation\n  if (hasIsolation(wrapperOptions) || wrapperOptions.user) {\n    await runWithIsolation(\n      wrapperOptions,\n      command,\n      useCommandStream,\n      sessionId\n    );\n  } else {\n    if (useCommandStream) {\n      await runDirectWithCommandStream(\n        command,\n        parsedCommand,\n        substitutionResult,\n        sessionId\n      );\n    } else {\n      await runDirect(command, sessionId);\n    }\n  }\n})();\n\nfunction handleStatusQuery(uuid, outputFormat) {\n  const result = queryStatus(getExecutionStore(), uuid, outputFormat);\n  if (result.success) {\n    console.log(result.output);\n  } else {\n    console.error(`Error: ${result.error}`);\n    process.exit(1);\n  }\n}\n\n/**\n * Handle --cleanup flag\n * Cleans up stale \"executing\" records (processes that crashed or were killed)\n * @param {boolean} dryRun - If true, just report what would be cleaned\n */\nfunction handleCleanup(dryRun) {\n  const store = getExecutionStore();\n  if (!store) {\n    console.error('Error: Execution tracking is disabled.');\n    process.exit(1);\n  }\n\n  const result = store.cleanupStale({ dryRun });\n\n  if (result.errors.length > 0) {\n    for (const error of result.errors) {\n      console.error(`Error: ${error}`);\n    }\n  }\n\n  if (result.records.length === 0) {\n    console.log('No stale records found.');\n    return;\n  }\n\n  if (dryRun) {\n    console.log(\n      `Found ${result.records.length} stale record(s) that would be cleaned up:\\n`\n    );\n  } else {\n    console.log(`Cleaned up ${result.cleaned} stale record(s):\\n`);\n  }\n\n  for (const record of result.records) {\n    const startTime = new Date(record.startTime).toLocaleString();\n    console.log(`  UUID: ${record.uuid}`);\n    console.log(`  Command: ${record.command}`);\n    console.log(`  Started: ${startTime}`);\n    console.log(`  PID: ${record.pid || 'N/A'}`);\n    console.log('');\n  }\n\n  if (dryRun) {\n    console.log('Run with --cleanup to actually clean up these records.');\n  }\n}\n\n/** Print usage information */\nfunction printUsage() {\n  console.log(`Usage: $ [options] [--] <command> | $ --status <uuid> [--output-format <fmt>]\n\nOptions:\n  --isolated, -i <env>  Run in isolated environment (screen, tmux, docker, ssh)\n  --attached, -a        Run in attached mode (foreground)\n  --detached, -d        Run in detached mode (background)\n  --session, -s <name>  Session name for isolation\n  --session-id <uuid>   Session UUID for tracking (auto-generated if not provided)\n  --session-name <uuid> Alias for --session-id\n  --image <image>       Docker image (required for docker isolation)\n  --endpoint <endpoint> SSH endpoint (required for ssh isolation, e.g., user@host)\n  --isolated-user, -u [name]  Create isolated user with same permissions\n  --keep-user           Keep isolated user after command completes\n  --keep-alive, -k      Keep isolation environment alive after command exits\n  --auto-remove-docker-container  Auto-remove docker container after exit\n  --shell <shell>       Shell to use in isolation environments: auto, bash, zsh, sh (default: auto)\n  --use-command-stream  Use command-stream library for execution (experimental)\n  --status <uuid>       Show status of execution by UUID (--output-format: links-notation|json|text)\n  --cleanup             Clean up stale \"executing\" records (crashed/killed processes)\n  --cleanup-dry-run     Show stale records that would be cleaned up (without cleaning)\n  --version, -v         Show version information\n\nExamples:\n  $ echo \"Hello World\"\n  $ bun test\n  $ --isolated tmux -- bun start\n  $ -i screen -d bun start\n  $ --isolated docker --image oven/bun:latest -- bun install\n  $ --isolated ssh --endpoint user@remote.server -- ls -la\n  $ --isolated-user -- npm test            # Create isolated user\n  $ -u myuser -- npm start                 # Custom username\n  $ -i screen --isolated-user -- npm test  # Combine with process isolation\n  $ --isolated-user --keep-user -- npm start\n  $ --use-command-stream echo \"Hello\"      # Use command-stream library`);\n  console.log('');\n  console.log('Piping with $:');\n  console.log('  echo \"hi\" | $ agent       # Preferred - pipe TO $ command');\n  console.log(\n    '  $ \\'echo \"hi\" | agent\\'   # Alternative - quote entire pipeline'\n  );\n  console.log('');\n  console.log('Quoting for special characters:');\n  console.log(\"  $ 'npm test && npm build' # Wrap for logical operators\");\n  console.log(\"  $ 'cat file > output.txt' # Wrap for redirections\");\n  console.log('');\n  console.log('Features:');\n  console.log('  - Logs all output to temporary directory');\n  console.log('  - Displays timestamps and exit codes');\n  console.log(\n    '  - Auto-reports failures for NPM packages (when gh is available)'\n  );\n  console.log('  - Natural language command aliases (via substitutions.lino)');\n  console.log('  - Process isolation via screen, tmux, or docker');\n  console.log('');\n  console.log('Alias examples:');\n  console.log('  $ install lodash npm package           -> npm install lodash');\n  console.log(\n    '  $ install 4.17.21 version of lodash npm package -> npm install lodash@4.17.21'\n  );\n  console.log(\n    '  $ clone https://github.com/user/repo repository -> git clone https://github.com/user/repo'\n  );\n}\n\n/**\n * Run command in isolation mode\n * @param {object} options - Wrapper options\n * @param {string} cmd - Command to execute\n * @param {boolean} useCommandStream - Whether to use command-stream for isolation\n * @param {string} sessionId - Session UUID for tracking\n */\nasync function runWithIsolation(\n  options,\n  cmd,\n  useCommandStream = false,\n  sessionId\n) {\n  const environment = options.isolated;\n  const mode = getEffectiveMode(options);\n  const startTime = getTimestamp();\n  const startTimeMs = Date.now();\n\n  // Use default Docker image if docker isolation is selected but no image specified\n  let effectiveImage = options.image;\n  if (environment === 'docker' && !effectiveImage) {\n    effectiveImage = getDefaultDockerImage();\n  }\n\n  // Create log file path\n  const logFilePath = createLogPath(environment || 'direct');\n\n  // Get session name (will be generated by runIsolated if not provided)\n  const sessionName =\n    options.session ||\n    `${environment || 'start'}-${Date.now()}-${Math.random().toString(36).substring(2, 8)}`;\n\n  // Determine the shell\n  const isWindows = process.platform === 'win32';\n  const shell = isWindows ? 'powershell.exe' : process.env.SHELL || '/bin/sh';\n\n  // Collect isolation info lines for start block\n  const extraLines = [];\n\n  // Handle --isolated-user option: create a new user with same permissions\n  let createdUser = null;\n\n  if (options.user) {\n    // Check for sudo access\n    if (!hasSudoAccess()) {\n      console.error(\n        'Error: --isolated-user requires sudo access without password.'\n      );\n      console.error(\n        'Configure NOPASSWD in sudoers or run with appropriate permissions.'\n      );\n      process.exit(1);\n    }\n\n    // Get current user groups to show what will be inherited\n    const currentGroups = getCurrentUserGroups();\n    const importantGroups = ['sudo', 'docker', 'wheel', 'admin'].filter((g) =>\n      currentGroups.includes(g)\n    );\n\n    extraLines.push('[User Isolation] Creating new user...');\n    if (importantGroups.length > 0) {\n      extraLines.push(\n        `[User Isolation] Inheriting groups: ${importantGroups.join(', ')}`\n      );\n    }\n\n    // Create the isolated user\n    const userResult = createIsolatedUser(options.userName);\n    if (!userResult.success) {\n      console.error(\n        `Error: Failed to create isolated user: ${userResult.message}`\n      );\n      process.exit(1);\n    }\n\n    createdUser = userResult.username;\n    extraLines.push(`[User Isolation] Created user: ${createdUser}`);\n    if (userResult.groups && userResult.groups.length > 0) {\n      extraLines.push(\n        `[User Isolation] User groups: ${userResult.groups.join(', ')}`\n      );\n    }\n    if (options.keepUser) {\n      extraLines.push('[User Isolation] User will be kept after completion');\n    }\n  }\n\n  // Add isolation info to extra lines\n  if (environment) {\n    extraLines.push(`[Isolation] Environment: ${environment}, Mode: ${mode}`);\n    // Always add the session name so users can reconnect to detached sessions\n    // This is important for screen, tmux, docker where the session/container name\n    // is different from the session UUID used for tracking (see issue #67)\n    extraLines.push(`[Isolation] Session: ${sessionName}`);\n  }\n  if (effectiveImage) {\n    extraLines.push(`[Isolation] Image: ${effectiveImage}`);\n  }\n  if (options.endpoint) {\n    extraLines.push(`[Isolation] Endpoint: ${options.endpoint}`);\n  }\n  if (createdUser) {\n    extraLines.push(`[Isolation] User: ${createdUser} (isolated)`);\n  }\n  if (useCommandStream) {\n    extraLines.push('[Isolation] Using command-stream library');\n  }\n\n  // Create execution record for tracking with provided session ID\n  let executionRecord = null;\n  const store = getExecutionStore();\n  if (store) {\n    executionRecord = new ExecutionRecord({\n      uuid: sessionId, // Use the provided session ID\n      command: cmd,\n      logPath: logFilePath,\n      shell,\n      workingDirectory: process.cwd(),\n      options: {\n        isolated: environment,\n        isolationMode: mode,\n        sessionName,\n        image: effectiveImage,\n        endpoint: options.endpoint,\n        user: options.user,\n        keepAlive: options.keepAlive,\n        useCommandStream,\n      },\n    });\n  }\n\n  // Print start block with session ID and isolation info\n  // For docker isolation, defer command printing to allow virtual commands (like docker pull) to be shown first\n  const deferCommand = environment === 'docker';\n  console.log(\n    createStartBlock({\n      sessionId,\n      timestamp: startTime,\n      command: cmd,\n      extraLines,\n      deferCommand,\n    })\n  );\n  // Only print empty line when not deferring command (docker isolation handles its own spacing)\n  if (!deferCommand) {\n    console.log('');\n  }\n\n  // Save initial execution record and set global reference for signal cleanup\n  if (executionRecord && store) {\n    currentExecutionRecord = executionRecord;\n    try {\n      store.save(executionRecord);\n    } catch (err) {\n      if (config.verbose) {\n        console.error(\n          `[Tracking] Warning: Could not save execution record: ${err.message}`\n        );\n      }\n    }\n  }\n\n  // Create log content\n  let logContent = createLogHeader({\n    command: cmd,\n    environment: environment || 'direct',\n    mode,\n    sessionName,\n    image: effectiveImage,\n    user: createdUser,\n    startTime,\n  });\n\n  // Add execution ID to log content\n  if (executionRecord) {\n    logContent = logContent.replace(\n      '=== Start Command Log ===\\n',\n      `=== Start Command Log ===\\nExecution ID: ${executionRecord.uuid}\\n`\n    );\n  }\n\n  let result;\n\n  if (environment) {\n    // Run in isolation environment (screen, tmux, docker, ssh)\n    // Note: Isolation environments currently use native spawn/execSync\n    // Future: Add command-stream support with raw() function for multiplexers\n    result = await runIsolated(environment, cmd, {\n      session: options.session,\n      image: effectiveImage,\n      endpoint: options.endpoint,\n      detached: mode === 'detached',\n      user: createdUser,\n      keepAlive: options.keepAlive,\n      autoRemoveDockerContainer: options.autoRemoveDockerContainer,\n      shell: options.shell,\n    });\n  } else if (createdUser) {\n    // Run directly as the created user (no isolation environment)\n    result = await runAsIsolatedUser(cmd, createdUser);\n  } else {\n    // This shouldn't happen in isolation mode, but handle gracefully\n    result = { success: false, message: 'No isolation configuration provided' };\n  }\n\n  // Get exit code\n  const exitCode =\n    result.exitCode !== undefined ? result.exitCode : result.success ? 0 : 1;\n  const endTime = getTimestamp();\n\n  // Print failure message to stderr so user sees why isolation failed (e.g. Docker not installed)\n  if (!result.success && result.message) {\n    console.error(`Error: ${result.message}`);\n  }\n  // Add result to log content\n  logContent += `${result.message}\\n`;\n  logContent += createLogFooter(endTime, exitCode);\n\n  // Write log file\n  writeLogFile(logFilePath, logContent);\n\n  // Update execution record as completed and clear global reference\n  if (executionRecord && store) {\n    executionRecord.complete(exitCode);\n    try {\n      store.save(executionRecord);\n    } catch (err) {\n      if (config.verbose) {\n        console.error(\n          `[Tracking] Warning: Could not update execution record: ${err.message}`\n        );\n      }\n    }\n    // Clear global reference since we've completed normally\n    currentExecutionRecord = null;\n  }\n\n  // Cleanup: delete the created user if we created one (unless --keep-user)\n  // This output goes to stdout but NOT inside the boxes - it's operational info\n  if (createdUser && !options.keepUser) {\n    console.log(`[User Isolation] Cleaning up user: ${createdUser}`);\n    const deleteResult = deleteUser(createdUser, { removeHome: true });\n    if (deleteResult.success) {\n      console.log('[User Isolation] User deleted successfully');\n    } else {\n      console.log(`[User Isolation] Warning: ${deleteResult.message}`);\n    }\n    console.log('');\n  } else if (createdUser && options.keepUser) {\n    console.log(\n      `[User Isolation] Keeping user: ${createdUser} (use 'sudo userdel -r ${createdUser}' to delete)`\n    );\n    console.log('');\n  }\n\n  // Print finish block with isolation metadata repeated\n  // Add empty line before finish block for visual separation\n  console.log('');\n  const durationMs = Date.now() - startTimeMs;\n  console.log(\n    createFinishBlock({\n      sessionId,\n      timestamp: endTime,\n      exitCode,\n      logPath: logFilePath,\n      durationMs,\n      extraLines, // Pass extraLines for isolation metadata repetition in footer\n    })\n  );\n\n  process.exit(exitCode);\n}\n\n/**\n * Run command directly (without isolation)\n *\n * Uses Bun.spawn when running on Bun for reliable event handling on macOS.\n * Falls back to node:child_process for Node.js compatibility.\n *\n * Issue #57: On macOS with Bun, node:child_process events may not fire reliably\n * before the event loop exits. Bun.spawn provides more reliable stream handling.\n *\n * @param {string} cmd - Command to execute\n * @param {string} sessionId - Session UUID for tracking\n */\nasync function runDirect(cmd, sessionId) {\n  // Get the command name (first word of the actual command to execute)\n  const commandName = cmd.split(' ')[0];\n\n  // Determine the shell based on the platform\n  const isWindows = process.platform === 'win32';\n  const shell = isWindows ? 'powershell.exe' : process.env.SHELL || '/bin/sh';\n  const shellArgs = isWindows ? ['-Command', cmd] : ['-c', cmd];\n\n  // Setup logging\n  const logDir = config.logDir || os.tmpdir();\n  const logFilename = generateLogFilename();\n  const logFilePath = path.join(logDir, logFilename);\n\n  let logContent = '';\n  const startTime = getTimestamp();\n  const startTimeMs = Date.now();\n\n  // Get runtime information\n  const runtime = typeof Bun !== 'undefined' ? 'Bun' : 'Node.js';\n  const runtimeVersion =\n    typeof Bun !== 'undefined' ? Bun.version : process.version;\n\n  // Create execution record for tracking with provided session ID\n  let executionRecord = null;\n  const store = getExecutionStore();\n  if (store) {\n    executionRecord = new ExecutionRecord({\n      uuid: sessionId, // Use the provided session ID\n      command: cmd,\n      logPath: logFilePath,\n      shell,\n      workingDirectory: process.cwd(),\n      options: {\n        substitutionMatched: substitutionResult?.matched || false,\n        originalCommand: substitutionResult?.matched ? parsedCommand : null,\n        runtime,\n        runtimeVersion,\n      },\n    });\n    // Set global reference for signal cleanup\n    currentExecutionRecord = executionRecord;\n  }\n\n  // Log header\n  logContent += `=== Start Command Log ===\\n`;\n  logContent += `Timestamp: ${startTime}\\n`;\n  logContent += `Session ID: ${sessionId}\\n`;\n  if (substitutionResult && substitutionResult.matched) {\n    logContent += `Original Input: ${parsedCommand}\\n`;\n    logContent += `Substituted Command: ${cmd}\\n`;\n    logContent += `Pattern Matched: ${substitutionResult.rule.pattern}\\n`;\n  } else {\n    logContent += `Command: ${cmd}\\n`;\n  }\n  logContent += `Shell: ${shell}\\n`;\n  logContent += `Platform: ${process.platform}\\n`;\n  logContent += `${runtime} Version: ${runtimeVersion}\\n`;\n  logContent += `Working Directory: ${process.cwd()}\\n`;\n  logContent += `${'='.repeat(50)}\\n\\n`;\n\n  // Print start block with session ID\n  const displayCommand =\n    substitutionResult && substitutionResult.matched\n      ? `${parsedCommand} -> ${cmd}`\n      : cmd;\n  console.log(\n    createStartBlock({\n      sessionId,\n      timestamp: startTime,\n      command: displayCommand,\n    })\n  );\n  console.log('');\n\n  // Completion callback\n  const onComplete = (exitCode, endTime, _logContent, durationMs) => {\n    // Clear global reference since execution completed normally\n    currentExecutionRecord = null;\n    console.log('');\n    console.log(\n      createFinishBlock({\n        sessionId,\n        timestamp: endTime,\n        exitCode,\n        logPath: logFilePath,\n        durationMs,\n      })\n    );\n    if (exitCode !== 0) {\n      handleFailure(config, commandName, cmd, exitCode, logFilePath);\n    }\n    process.exit(exitCode);\n  };\n\n  // Error callback\n  const onError = (errorMessage, endTime, durationMs) => {\n    // Clear global reference since execution completed (with error)\n    currentExecutionRecord = null;\n    console.error(`\\n${errorMessage}`);\n    console.log('');\n    console.log(\n      createFinishBlock({\n        sessionId,\n        timestamp: endTime,\n        exitCode: 1,\n        logPath: logFilePath,\n        durationMs,\n      })\n    );\n    handleFailure(config, commandName, cmd, 1, logFilePath);\n    process.exit(1);\n  };\n\n  // Use Bun.spawn when running on Bun for reliable event handling on macOS\n  // Fall back to node:child_process for Node.js compatibility\n  const spawnOptions = {\n    shell,\n    shellArgs,\n    logFilePath,\n    logContent,\n    startTimeMs,\n    executionRecord,\n    store,\n    config,\n    onComplete,\n    onError,\n  };\n\n  if (typeof Bun !== 'undefined') {\n    await runWithBunSpawn(spawnOptions);\n  } else {\n    runWithNodeSpawn(spawnOptions);\n  }\n}\n\n/**\n * Run command directly using command-stream library (experimental)\n * @param {string} cmd - Command to execute\n * @param {string} parsedCmd - Original parsed command\n * @param {object} subResult - Result from substitution engine\n * @param {string} sessionId - Session UUID for tracking\n */\nasync function runDirectWithCommandStream(\n  cmd,\n  parsedCmd,\n  subResult,\n  sessionId\n) {\n  // Lazy load command-stream\n  const { getCommandStream } = require('../lib/command-stream');\n  const { $, raw } = await getCommandStream();\n\n  // Get the command name (first word of the actual command to execute)\n  const commandName = cmd.split(' ')[0];\n\n  // Determine the shell based on the platform\n  const isWindows = process.platform === 'win32';\n  const shell = isWindows ? 'powershell.exe' : process.env.SHELL || '/bin/sh';\n\n  // Setup logging\n  const logDir = config.logDir || os.tmpdir();\n  const logFilename = generateLogFilename();\n  const logFilePath = path.join(logDir, logFilename);\n\n  let logContent = '';\n  const startTime = getTimestamp();\n  const startTimeMs = Date.now();\n\n  // Get runtime information\n  const runtime = typeof Bun !== 'undefined' ? 'Bun' : 'Node.js';\n  const runtimeVersion =\n    typeof Bun !== 'undefined' ? Bun.version : process.version;\n\n  // Create execution record for tracking with provided session ID\n  let executionRecord = null;\n  const store = getExecutionStore();\n  if (store) {\n    executionRecord = new ExecutionRecord({\n      uuid: sessionId, // Use the provided session ID\n      command: cmd,\n      logPath: logFilePath,\n      shell,\n      workingDirectory: process.cwd(),\n      options: {\n        substitutionMatched: subResult?.matched || false,\n        originalCommand: subResult?.matched ? parsedCmd : null,\n        runtime,\n        runtimeVersion,\n        executionMode: 'command-stream',\n      },\n    });\n    // Set global reference for signal cleanup\n    currentExecutionRecord = executionRecord;\n  }\n\n  // Log header\n  logContent += `=== Start Command Log ===\\n`;\n  logContent += `Timestamp: ${startTime}\\n`;\n  logContent += `Session ID: ${sessionId}\\n`;\n  logContent += `Execution Mode: command-stream\\n`;\n  if (subResult && subResult.matched) {\n    logContent += `Original Input: ${parsedCmd}\\n`;\n    logContent += `Substituted Command: ${cmd}\\n`;\n    logContent += `Pattern Matched: ${subResult.rule.pattern}\\n`;\n  } else {\n    logContent += `Command: ${cmd}\\n`;\n  }\n  logContent += `Shell: ${shell}\\n`;\n  logContent += `Platform: ${process.platform}\\n`;\n  logContent += `${runtime} Version: ${runtimeVersion}\\n`;\n  logContent += `Working Directory: ${process.cwd()}\\n`;\n  logContent += `${'='.repeat(50)}\\n\\n`;\n\n  // Print start block with session ID\n  const displayCmd =\n    subResult && subResult.matched ? `${parsedCmd} -> ${cmd}` : cmd;\n  console.log(\n    createStartBlock({\n      sessionId,\n      timestamp: startTime,\n      command: displayCmd,\n    })\n  );\n  console.log('[command-stream] Using command-stream library');\n  console.log('');\n\n  // Save initial execution record (PID will be updated later if available)\n  if (executionRecord && store) {\n    try {\n      store.save(executionRecord);\n    } catch (err) {\n      if (config.verbose) {\n        console.error(\n          `[Tracking] Warning: Could not save execution record: ${err.message}`\n        );\n      }\n    }\n  }\n\n  // Execute the command using command-stream with real-time output\n  // Using mirror: true to show output in real-time, capture: true to collect it\n  // Using raw() to avoid auto-escaping that might interfere with complex shell commands\n  const $cmd = $({ mirror: true, capture: true });\n\n  let exitCode = 0;\n  try {\n    // Use raw() to pass the command without auto-escaping\n    // This is important for complex commands with pipes, redirects, etc.\n    const result = await $cmd`${raw(cmd)}`;\n    exitCode = result.code || 0;\n\n    // Update PID if available from result\n    if (executionRecord && result.pid) {\n      executionRecord.pid = result.pid;\n    }\n\n    // Collect output for log\n    if (result.stdout) {\n      logContent += result.stdout;\n    }\n    if (result.stderr) {\n      logContent += result.stderr;\n    }\n  } catch (err) {\n    exitCode = err.code || 1;\n    const errorMessage = `Error executing command: ${err.message}`;\n    logContent += `\\n${errorMessage}\\n`;\n    console.error(`\\n${errorMessage}`);\n  }\n\n  const endTime = getTimestamp();\n\n  // Log footer\n  logContent += `\\n${'='.repeat(50)}\\n`;\n  logContent += `Finished: ${endTime}\\n`;\n  logContent += `Exit Code: ${exitCode}\\n`;\n\n  // Write log file\n  try {\n    fs.writeFileSync(logFilePath, logContent, 'utf8');\n  } catch (err) {\n    console.error(`\\nWarning: Could not save log file: ${err.message}`);\n  }\n\n  // Update execution record as completed and clear global reference\n  if (executionRecord && store) {\n    executionRecord.complete(exitCode);\n    try {\n      store.save(executionRecord);\n    } catch (err) {\n      if (config.verbose) {\n        console.error(\n          `[Tracking] Warning: Could not update execution record: ${err.message}`\n        );\n      }\n    }\n    // Clear global reference since we've completed normally\n    currentExecutionRecord = null;\n  }\n\n  // Print finish block\n  const durationMs = Date.now() - startTimeMs;\n  console.log('');\n  console.log(\n    createFinishBlock({\n      sessionId,\n      timestamp: endTime,\n      exitCode,\n      logPath: logFilePath,\n      durationMs,\n    })\n  );\n\n  // If command failed, try to auto-report\n  if (exitCode !== 0) {\n    handleFailure(config, commandName, cmd, exitCode, logFilePath);\n  }\n\n  process.exit(exitCode);\n}\n\n/**\n * Generate unique log filename for direct execution\n * @returns {string} Log filename\n */\nfunction generateLogFilename() {\n  const timestamp = Date.now();\n  const random = Math.random().toString(36).substring(2, 8);\n  return `start-command-${timestamp}-${random}.log`;\n}\n",
      "numLines": 1000,
      "startLine": 1,
      "totalLines": 1000
    }
  }
 }
 [2026-03-14T13:28:57.786Z] [INFO] {
  "type": "assistant",
  "message": {
    "model": "claude-opus-4-6",
    "id": "msg_01Tqpd6QJ4eHfDb7Mgyi9vtc",
    "type": "message",
    "role": "assistant",
    "content": [
      {
        "type": "tool_use",
        "id": "toolu_01AphfXNJPfUXxeRGJwURwdq",
        "name": "Read",
        "input": {
          "file_path": "/tmp/gh-issue-solver-1773494815317/js/src/lib/isolation.js"
        },
        "caller": {
          "type": "direct"
        }
      }
    ],
    "stop_reason": null,
    "stop_sequence": null,
    "usage": {
      "input_tokens": 1,
      "cache_creation_input_tokens": 333,
      "cache_read_input_tokens": 33962,
      "cache_creation": {
        "ephemeral_5m_input_tokens": 0,
        "ephemeral_1h_input_tokens": 333
      },
      "output_tokens": 1,
      "service_tier": "standard",
      "inference_geo": "not_available"
    },
    "context_management": null
  },
  "parent_tool_use_id": null,
  "session_id": "914de587-6218-4c93-b322-d791963b9891",
  "uuid": "d37b6e64-a22a-4724-8082-52e6643288d3"
 }
 [2026-03-14T13:28:57.800Z] [INFO] {
  "type": "user",
  "message": {
    "role": "user",
    "content": [
      {
        "tool_use_id": "toolu_01AphfXNJPfUXxeRGJwURwdq",
        "type": "tool_result",
        "content": "     1→/** Isolation Runners for start-command (screen, tmux, docker, ssh) */\n     2→\n     3→const { execSync, spawn, spawnSync } = require('child_process');\n     4→const path = require('path');\n     5→const { generateSessionName } = require('./args-parser');\n     6→const outputBlocks = require('./output-blocks');\n     7→\n     8→// Debug mode from environment\n     9→const DEBUG =\n    10→  process.env.START_DEBUG === '1' || process.env.START_DEBUG === 'true';\n    11→\n    12→const {\n    13→  getScreenVersion,\n    14→  supportsLogfileOption,\n    15→  runScreenWithLogCapture: _runScreenWithLogCapture,\n    16→  resetScreenVersionCache,\n    17→} = require('./screen-isolation');\n    18→\n    19→/**\n    20→ * Check if a command is available on the system\n    21→ * @param {string} command - Command to check\n    22→ * @returns {boolean} True if command is available\n    23→ */\n    24→function isCommandAvailable(command) {\n    25→  try {\n    26→    const isWindows = process.platform === 'win32';\n    27→    const checkCmd = isWindows ? 'where' : 'which';\n    28→    execSync(`${checkCmd} ${command}`, { stdio: ['pipe', 'pipe', 'pipe'] });\n    29→    return true;\n    30→  } catch {\n    31→    return false;\n    32→  }\n    33→}\n    34→\n    35→/** Get the shell to use for command execution. */\n    36→function getShell() {\n    37→  const isWindows = process.platform === 'win32';\n    38→  const shell = isWindows ? 'cmd.exe' : process.env.SHELL || '/bin/sh';\n    39→  const shellArg = isWindows ? '/c' : '-c';\n    40→  return { shell, shellArg };\n    41→}\n    42→\n    43→/**\n    44→ * Detect the best available shell in an isolation environment (docker/ssh)\n    45→ * Tries shells in order: bash, zsh, sh\n    46→ * @param {'docker'|'ssh'} environment - Isolation environment type\n    47→ * @param {object} options - Options for the isolation environment\n    48→ * @param {string} [shellPreference='auto'] - Shell preference: 'auto', 'bash', 'zsh', 'sh'\n    49→ * @returns {string} Shell path to use\n    50→ */\n    51→function detectShellInEnvironment(\n    52→  environment,\n    53→  options,\n    54→  shellPreference = 'auto'\n    55→) {\n    56→  // If a specific shell is requested (not auto), use it directly\n    57→  if (shellPreference && shellPreference !== 'auto') {\n    58→    if (DEBUG) {\n    59→      console.log(`[DEBUG] Using forced shell: ${shellPreference}`);\n    60→    }\n    61→    return shellPreference;\n    62→  }\n    63→\n    64→  // In auto mode, try shells in order of preference\n    65→  const shellsToTry = ['bash', 'zsh', 'sh'];\n    66→\n    67→  if (environment === 'docker') {\n    68→    const image = options.image;\n    69→    if (!image) {\n    70→      return 'sh';\n    71→    }\n    72→\n    73→    for (const shell of shellsToTry) {\n    74→      try {\n    75→        const result = spawnSync(\n    76→          'docker',\n    77→          ['run', '--rm', image, 'sh', '-c', `command -v ${shell}`],\n    78→          { encoding: 'utf8', stdio: ['pipe', 'pipe', 'pipe'] }\n    79→        );\n    80→        if (result.status === 0 && result.stdout.trim()) {\n    81→          if (DEBUG) {\n    82→            console.log(\n    83→              `[DEBUG] Detected shell in docker image ${image}: ${result.stdout.trim()}`\n    84→            );\n    85→          }\n    86→          return result.stdout.trim();\n    87→        }\n    88→      } catch {\n    89→        // ignore; try next shell\n    90→      }\n    91→    }\n    92→\n    93→    if (DEBUG) {\n    94→      console.log(\n    95→        `[DEBUG] Could not detect shell in docker image ${image}, falling back to sh`\n    96→      );\n    97→    }\n    98→    return 'sh';\n    99→  }\n   100→\n   101→  if (environment === 'ssh') {\n   102→    const endpoint = options.endpoint;\n   103→    if (!endpoint) {\n   104→      return 'sh';\n   105→    }\n   106→\n   107→    try {\n   108→      // Run a single SSH command to check for available shells in order\n   109→      const checkCmd = shellsToTry.map((s) => `command -v ${s}`).join(' || ');\n   110→      const result = spawnSync('ssh', [endpoint, checkCmd], {\n   111→        encoding: 'utf8',\n   112→        stdio: ['pipe', 'pipe', 'pipe'],\n   113→      });\n   114→      if (result.status === 0 && result.stdout.trim()) {\n   115→        const detected = result.stdout.trim();\n   116→        if (DEBUG) {\n   117→          console.log(\n   118→            `[DEBUG] Detected shell on SSH host ${endpoint}: ${detected}`\n   119→          );\n   120→        }\n   121→        return detected;\n   122→      }\n   123→    } catch {\n   124→      // Fall through to default\n   125→    }\n   126→\n   127→    if (DEBUG) {\n   128→      console.log(\n   129→        `[DEBUG] Could not detect shell on SSH host ${endpoint}, falling back to sh`\n   130→      );\n   131→    }\n   132→    return 'sh';\n   133→  }\n   134→\n   135→  return 'sh';\n   136→}\n   137→\n   138→/** Returns \"-i\" for bash/zsh (enables .bashrc sourcing), null otherwise. */\n   139→function getShellInteractiveFlag(shellPath) {\n   140→  const shellName = shellPath.split('/').pop();\n   141→  return shellName === 'bash' || shellName === 'zsh' ? '-i' : null;\n   142→}\n   143→const {\n   144→  isInteractiveShellCommand,\n   145→  isShellInvocationWithArgs,\n   146→  buildShellWithArgsCmdArgs,\n   147→  buildDisplayCommand,\n   148→} = require('./shell-utils');\n   149→\n   150→/** Returns true if the current process has a TTY attached. */\n   151→function hasTTY() {\n   152→  return Boolean(process.stdin.isTTY && process.stdout.isTTY);\n   153→}\n   154→\n   155→/** Wraps command with sudo -u if user is specified; returns command unchanged otherwise. */\n   156→function wrapCommandWithUser(command, user) {\n   157→  if (!user) {\n   158→    return command;\n   159→  }\n   160→  // sudo -n: non-interactive (fails if password required); -u: run as user\n   161→  return `sudo -n -u ${user} sh -c '${command.replace(/'/g, \"'\\\\''\")}'`;\n   162→}\n   163→\n   164→/**\n   165→ * Run command in GNU Screen using detached mode with log capture.\n   166→ * Supports screen >= 4.5.1 (native -Logfile) and older versions (tee fallback).\n   167→ * @param {string} command - Command to execute\n   168→ * @param {string} sessionName - Session name\n   169→ * @param {object} shellInfo - Shell info from getShell()\n   170→ * @param {string|null} user - Username to run command as (optional)\n   171→ * @returns {Promise<{success: boolean, sessionName: string, message: string, output: string}>}\n   172→ */\n   173→function runScreenWithLogCapture(command, sessionName, shellInfo, user = null) {\n   174→  return _runScreenWithLogCapture(\n   175→    command,\n   176→    sessionName,\n   177→    shellInfo,\n   178→    user,\n   179→    wrapCommandWithUser,\n   180→    isInteractiveShellCommand\n   181→  );\n   182→}\n   183→\n   184→/**\n   185→ * Run command in GNU Screen\n   186→ * @param {string} command - Command to execute\n   187→ * @param {object} options - Options (session, detached, user, keepAlive)\n   188→ * @returns {Promise<{success: boolean, sessionName: string, message: string}>}\n   189→ */\n   190→function runInScreen(command, options = {}) {\n   191→  if (!isCommandAvailable('screen')) {\n   192→    return Promise.resolve({\n   193→      success: false,\n   194→      sessionName: null,\n   195→      message:\n   196→        'screen is not installed. Install it with: sudo apt-get install screen (Debian/Ubuntu) or brew install screen (macOS)',\n   197→    });\n   198→  }\n   199→\n   200→  const sessionName = options.session || generateSessionName('screen');\n   201→  const shellInfo = getShell();\n   202→  const { shell, shellArg } = shellInfo;\n   203→\n   204→  try {\n   205→    // Wrap command with user switch if specified\n   206→    let effectiveCommand = wrapCommandWithUser(command, options.user);\n   207→\n   208→    if (options.detached) {\n   209→      if (options.keepAlive) {\n   210→        effectiveCommand = `${effectiveCommand}; exec ${shell}`;\n   211→      }\n   212→\n   213→      const screenArgs = isInteractiveShellCommand(command)\n   214→        ? ['-dmS', sessionName, ...command.trim().split(/\\s+/)]\n   215→        : ['-dmS', sessionName, shell, shellArg, effectiveCommand];\n   216→\n   217→      if (DEBUG) {\n   218→        console.log(`[DEBUG] Running: screen ${screenArgs.join(' ')}`);\n   219→        console.log(`[DEBUG] keepAlive: ${options.keepAlive || false}`);\n   220→      }\n   221→\n   222→      // Use spawnSync with array args (not execSync string) to avoid quoting issues (issue #25)\n   223→      const result = spawnSync('screen', screenArgs, {\n   224→        stdio: 'inherit',\n   225→      });\n   226→\n   227→      if (result.error) {\n   228→        throw result.error;\n   229→      }\n   230→\n   231→      let message = `Command started in detached screen session: ${sessionName}`;\n   232→      if (options.keepAlive) {\n   233→        message += `\\nSession will stay alive after command completes.`;\n   234→      } else {\n   235→        message += `\\nSession will exit automatically after command completes.`;\n   236→      }\n   237→      message += `\\nReattach with: screen -r ${sessionName}`;\n   238→\n   239→      return Promise.resolve({\n   240→        success: true,\n   241→        sessionName,\n   242→        message,\n   243→      });\n   244→    } else {\n   245→      return runScreenWithLogCapture(\n   246→        command,\n   247→        sessionName,\n   248→        shellInfo,\n   249→        options.user\n   250→      );\n   251→    }\n   252→  } catch (err) {\n   253→    return Promise.resolve({\n   254→      success: false,\n   255→      sessionName,\n   256→      message: `Failed to run in screen: ${err.message}`,\n   257→    });\n   258→  }\n   259→}\n   260→\n   261→/**\n   262→ * Run command in tmux\n   263→ * @param {string} command - Command to execute\n   264→ * @param {object} options - Options (session, detached, user, keepAlive)\n   265→ * @returns {Promise<{success: boolean, sessionName: string, message: string}>}\n   266→ */\n   267→function runInTmux(command, options = {}) {\n   268→  if (!isCommandAvailable('tmux')) {\n   269→    return Promise.resolve({\n   270→      success: false,\n   271→      sessionName: null,\n   272→      message:\n   273→        'tmux is not installed. Install it with: sudo apt-get install tmux (Debian/Ubuntu) or brew install tmux (macOS)',\n   274→    });\n   275→  }\n   276→\n   277→  const sessionName = options.session || generateSessionName('tmux');\n   278→  const shellInfo = getShell();\n   279→  const { shell } = shellInfo;\n   280→\n   281→  // Wrap command with user switch if specified\n   282→  let effectiveCommand = wrapCommandWithUser(command, options.user);\n   283→\n   284→  try {\n   285→    if (options.detached) {\n   286→      if (options.keepAlive) {\n   287→        effectiveCommand = `${effectiveCommand}; exec ${shell}`;\n   288→      }\n   289→\n   290→      if (DEBUG) {\n   291→        console.log(\n   292→          `[DEBUG] Running: tmux new-session -d -s \"${sessionName}\" \"${effectiveCommand}\"`\n   293→        );\n   294→        console.log(`[DEBUG] keepAlive: ${options.keepAlive || false}`);\n   295→      }\n   296→\n   297→      execSync(\n   298→        `tmux new-session -d -s \"${sessionName}\" \"${effectiveCommand}\"`,\n   299→        {\n   300→          stdio: 'inherit',\n   301→        }\n   302→      );\n   303→\n   304→      let message = `Command started in detached tmux session: ${sessionName}`;\n   305→      if (options.keepAlive) {\n   306→        message += `\\nSession will stay alive after command completes.`;\n   307→      } else {\n   308→        message += `\\nSession will exit automatically after command completes.`;\n   309→      }\n   310→      message += `\\nReattach with: tmux attach -t ${sessionName}`;\n   311→\n   312→      return Promise.resolve({\n   313→        success: true,\n   314→        sessionName,\n   315→        message,\n   316→      });\n   317→    } else {\n   318→      if (DEBUG) {\n   319→        console.log(\n   320→          `[DEBUG] Running: tmux new-session -s \"${sessionName}\" \"${effectiveCommand}\"`\n   321→        );\n   322→      }\n   323→\n   324→      return new Promise((resolve) => {\n   325→        const child = spawn(\n   326→          'tmux',\n   327→          ['new-session', '-s', sessionName, effectiveCommand],\n   328→          {\n   329→            stdio: 'inherit',\n   330→          }\n   331→        );\n   332→\n   333→        child.on('exit', (code) => {\n   334→          resolve({\n   335→            success: code === 0,\n   336→            sessionName,\n   337→            message: `Tmux session \"${sessionName}\" exited with code ${code}`,\n   338→            exitCode: code,\n   339→          });\n   340→        });\n   341→\n   342→        child.on('error', (err) => {\n   343→          resolve({\n   344→            success: false,\n   345→            sessionName,\n   346→            message: `Failed to start tmux: ${err.message}`,\n   347→          });\n   348→        });\n   349→      });\n   350→    }\n   351→  } catch (err) {\n   352→    return Promise.resolve({\n   353→      success: false,\n   354→      sessionName,\n   355→      message: `Failed to run in tmux: ${err.message}`,\n   356→    });\n   357→  }\n   358→}\n   359→\n   360→/**\n   361→ * Run command over SSH on a remote server\n   362→ * @param {string} command - Command to execute\n   363→ * @param {object} options - Options (endpoint, session, detached)\n   364→ * @returns {Promise<{success: boolean, sessionName: string, message: string}>}\n   365→ */\n   366→function runInSsh(command, options = {}) {\n   367→  if (!isCommandAvailable('ssh')) {\n   368→    return Promise.resolve({\n   369→      success: false,\n   370→      sessionName: null,\n   371→      message:\n   372→        'ssh is not installed. Install it with: sudo apt-get install openssh-client (Debian/Ubuntu) or brew install openssh (macOS)',\n   373→    });\n   374→  }\n   375→\n   376→  if (!options.endpoint) {\n   377→    return Promise.resolve({\n   378→      success: false,\n   379→      sessionName: null,\n   380→      message:\n   381→        'SSH isolation requires --endpoint option to specify the remote server (e.g., user@host)',\n   382→    });\n   383→  }\n   384→\n   385→  const sessionName = options.session || generateSessionName('ssh');\n   386→  const sshTarget = options.endpoint;\n   387→\n   388→  const shellToUse = detectShellInEnvironment('ssh', options, options.shell);\n   389→  // In auto mode, SSH login shells already source startup files (.bashrc etc.);\n   390→  // only wrap with an explicit shell when user requests one.\n   391→  const useExplicitShell =\n   392→    options.shell && options.shell !== 'auto' ? shellToUse : null;\n   393→  const shellInteractiveFlag = useExplicitShell\n   394→    ? getShellInteractiveFlag(useExplicitShell)\n   395→    : null;\n   396→\n   397→  try {\n   398→    if (options.detached) {\n   399→      const remoteShell = useExplicitShell || shellToUse;\n   400→      const shellInvocation = shellInteractiveFlag\n   401→        ? `${remoteShell} ${shellInteractiveFlag}`\n   402→        : remoteShell;\n   403→      const remoteCommand = isInteractiveShellCommand(command)\n   404→        ? `nohup ${command} > /tmp/${sessionName}.log 2>&1 &`\n   405→        : `nohup ${shellInvocation} -c ${JSON.stringify(command)} > /tmp/${sessionName}.log 2>&1 &`;\n   406→      const sshArgs = [sshTarget, remoteCommand];\n   407→\n   408→      if (DEBUG) {\n   409→        console.log(`[DEBUG] Running: ssh ${sshArgs.join(' ')}`);\n   410→        console.log(`[DEBUG] shell: ${shellInvocation}`);\n   411→      }\n   412→\n   413→      const result = spawnSync('ssh', sshArgs, { stdio: 'inherit' });\n   414→\n   415→      if (result.error) {\n   416→        throw result.error;\n   417→      }\n   418→\n   419→      return Promise.resolve({\n   420→        success: true,\n   421→        sessionName,\n   422→        message: `Command started in detached SSH session on ${sshTarget}\\nSession: ${sessionName}\\nView logs: ssh ${sshTarget} \"tail -f /tmp/${sessionName}.log\"`,\n   423→      });\n   424→    } else {\n   425→      const extraFlags = shellInteractiveFlag ? [shellInteractiveFlag] : [];\n   426→      const sshArgs = isInteractiveShellCommand(command)\n   427→        ? [sshTarget, ...command.trim().split(/\\s+/)]\n   428→        : useExplicitShell\n   429→          ? [sshTarget, useExplicitShell, ...extraFlags, '-c', command]\n   430→          : [sshTarget, command];\n   431→\n   432→      if (DEBUG) {\n   433→        console.log(`[DEBUG] Running: ssh ${sshArgs.join(' ')}`);\n   434→        console.log(`[DEBUG] shell: ${shellToUse}`);\n   435→      }\n   436→\n   437→      return new Promise((resolve) => {\n   438→        const child = spawn('ssh', sshArgs, {\n   439→          stdio: 'inherit',\n   440→        });\n   441→\n   442→        child.on('exit', (code) => {\n   443→          resolve({\n   444→            success: code === 0,\n   445→            sessionName,\n   446→            message: `SSH session \"${sessionName}\" on ${sshTarget} exited with code ${code}`,\n   447→            exitCode: code,\n   448→          });\n   449→        });\n   450→\n   451→        child.on('error', (err) => {\n   452→          resolve({\n   453→            success: false,\n   454→            sessionName,\n   455→            message: `Failed to start SSH: ${err.message}`,\n   456→          });\n   457→        });\n   458→      });\n   459→    }\n   460→  } catch (err) {\n   461→    return Promise.resolve({\n   462→      success: false,\n   463→      sessionName,\n   464→      message: `Failed to run over SSH: ${err.message}`,\n   465→    });\n   466→  }\n   467→}\n   468→\n   469→const {\n   470→  dockerImageExists,\n   471→  dockerPullImage,\n   472→  isDockerAvailable,\n   473→  getDefaultDockerImage,\n   474→  canRunLinuxDockerImages,\n   475→} = require('./docker-utils');\n   476→\n   477→/**\n   478→ * Run command in Docker container\n   479→ * @param {string} command - Command to execute\n   480→ * @param {object} options - Options (image, session/name, detached, user, keepAlive, autoRemoveDockerContainer)\n   481→ * @returns {Promise<{success: boolean, containerName: string, message: string}>}\n   482→ */\n   483→function runInDocker(command, options = {}) {\n   484→  const dockerNotAvailableError = !isCommandAvailable('docker')\n   485→    ? 'Docker is not installed. Install Docker from https://docs.docker.com/get-docker/'\n   486→    : !isDockerAvailable()\n   487→      ? 'Docker is installed but not running. Please start Docker Desktop or the Docker daemon, then try again.'\n   488→      : null;\n   489→\n   490→  if (dockerNotAvailableError) {\n   491→    if (options.image) {\n   492→      const pullCmd = `docker pull ${options.image}`;\n   493→      console.log(outputBlocks.createVirtualCommandBlock(pullCmd));\n   494→      console.log();\n   495→      // ✗ and │ come from createFinishBlock() AFTER the error message (issue #89)\n   496→    }\n   497→    return Promise.resolve({\n   498→      success: false,\n   499→      containerName: null,\n   500→      message: dockerNotAvailableError,\n   501→    });\n   502→  }\n   503→\n   504→  if (!options.image) {\n   505→    return Promise.resolve({\n   506→      success: false,\n   507→      containerName: null,\n   508→      message: 'Docker isolation requires --image option',\n   509→    });\n   510→  }\n   511→\n   512→  const containerName = options.session || generateSessionName('docker');\n   513→  if (!dockerImageExists(options.image)) {\n   514→    const pullResult = dockerPullImage(options.image);\n   515→    if (!pullResult.success) {\n   516→      return Promise.resolve({\n   517→        success: false,\n   518→        containerName: null,\n   519→        message: `Failed to pull Docker image: ${options.image}`,\n   520→        exitCode: 1,\n   521→      });\n   522→    }\n   523→  }\n   524→\n   525→  const isBareShell = isInteractiveShellCommand(command);\n   526→  const shellToUse = isBareShell\n   527→    ? 'sh'\n   528→    : detectShellInEnvironment('docker', options, options.shell);\n   529→  const shellInteractiveFlag = getShellInteractiveFlag(shellToUse);\n   530→\n   531→  console.log(outputBlocks.createCommandLine(buildDisplayCommand(command)));\n   532→  console.log();\n   533→\n   534→  try {\n   535→    if (options.detached) {\n   536→      const dockerArgs = ['run', '-d', '--name', containerName];\n   537→      if (options.autoRemoveDockerContainer) {\n   538→        dockerArgs.splice(2, 0, '--rm');\n   539→      }\n   540→\n   541→      if (options.user) {\n   542→        dockerArgs.push('--user', options.user);\n   543→      }\n   544→\n   545→      const effectiveCommand = options.keepAlive\n   546→        ? `${command}; exec ${shellToUse}`\n   547→        : command;\n   548→      const shellArgs = shellInteractiveFlag\n   549→        ? [shellToUse, shellInteractiveFlag]\n   550→        : [shellToUse];\n   551→      const cmdArgs = isBareShell\n   552→        ? command.trim().split(/\\s+/)\n   553→        : isShellInvocationWithArgs(command)\n   554→          ? buildShellWithArgsCmdArgs(effectiveCommand)\n   555→          : [...shellArgs, '-c', effectiveCommand];\n   556→      dockerArgs.push(options.image, ...cmdArgs);\n   557→\n   558→      if (DEBUG) {\n   559→        console.log(`[DEBUG] Running: docker ${dockerArgs.join(' ')}`);\n   560→        console.log(`[DEBUG] shell: ${shellToUse}`);\n   561→        console.log(`[DEBUG] keepAlive: ${options.keepAlive || false}`);\n   562→        console.log(\n   563→          `[DEBUG] autoRemoveDockerContainer: ${options.autoRemoveDockerContainer || false}`\n   564→        );\n   565→      }\n   566→\n   567→      const containerId = execSync(`docker ${dockerArgs.join(' ')}`, {\n   568→        encoding: 'utf8',\n   569→      }).trim();\n   570→\n   571→      let message = `Command started in detached docker container: ${containerName}`;\n   572→      message += `\\nContainer ID: ${containerId.substring(0, 12)}`;\n   573→      if (options.keepAlive) {\n   574→        message += `\\nContainer will stay alive after command completes.`;\n   575→      } else {\n   576→        message += `\\nContainer will exit automatically after command completes.`;\n   577→      }\n   578→      if (options.autoRemoveDockerContainer) {\n   579→        message += `\\nContainer will be automatically removed after exit.`;\n   580→      } else {\n   581→        message += `\\nContainer filesystem will be preserved after exit.`;\n   582→      }\n   583→      message += `\\nAttach with: docker attach ${containerName}`;\n   584→      message += `\\nView logs: docker logs ${containerName}`;\n   585→\n   586→      return Promise.resolve({\n   587→        success: true,\n   588→        containerName,\n   589→        containerId,\n   590→        message,\n   591→      });\n   592→    } else {\n   593→      const dockerArgs = ['run', '-it', '--rm', '--name', containerName];\n   594→      if (options.user) {\n   595→        dockerArgs.push('--user', options.user);\n   596→      }\n   597→      if (DEBUG) {\n   598→        console.log(`[DEBUG] shell: ${shellToUse}`);\n   599→      }\n   600→      const shellCmdArgs = shellInteractiveFlag\n   601→        ? [shellToUse, shellInteractiveFlag]\n   602→        : [shellToUse];\n   603→      // Bare shell: pass directly with -i (avoids bash-inside-bash, issue #84; -i ensures interactive).\n   604→      // Shell with -c: pass directly as argv (avoids double-wrapping and quote-stripping, issue #91).\n   605→      let attachedCmdArgs;\n   606→      if (isBareShell) {\n   607→        const parts = command.trim().split(/\\s+/);\n   608→        const bareFlag = getShellInteractiveFlag(parts[0]);\n   609→        attachedCmdArgs =\n   610→          bareFlag && !parts.includes(bareFlag)\n   611→            ? [parts[0], bareFlag, ...parts.slice(1)]\n   612→            : parts;\n   613→      } else if (isShellInvocationWithArgs(command)) {\n   614→        attachedCmdArgs = buildShellWithArgsCmdArgs(command);\n   615→      } else {\n   616→        attachedCmdArgs = [...shellCmdArgs, '-c', command];\n   617→      }\n   618→      dockerArgs.push(options.image, ...attachedCmdArgs);\n   619→\n   620→      if (DEBUG) {\n   621→        console.log(`[DEBUG] Running: docker ${dockerArgs.join(' ')}`);\n   622→      }\n   623→\n   624→      return new Promise((resolve) => {\n   625→        const startTime = Date.now();\n   626→        const child = spawn('docker', dockerArgs, { stdio: 'inherit' });\n   627→\n   628→        child.on('exit', (code) => {\n   629→          const durationMs = Date.now() - startTime;\n   630→          let message = `Docker container \"${containerName}\" exited with code ${code}`;\n   631→          // Bare shell exited non-zero quickly → startup file error; suggest --norc (issue #84).\n   632→          if (isBareShell && code !== 0 && durationMs < 3000) {\n   633→            const shell0 = command.trim().split(/\\s+/)[0];\n   634→            // prettier-ignore\n   635→            const norc = path.basename(shell0) === 'zsh' ? '--no-rcs' : '--norc';\n   636→            const hint = `Hint: The shell exited immediately — its startup file (.bashrc/.zshrc) may have errors.\\nTry skipping startup files: ${shell0} ${norc}`;\n   637→            console.log(hint);\n   638→            message += `\\n${hint}`;\n   639→          }\n   640→          resolve({\n   641→            success: code === 0,\n   642→            containerName,\n   643→            message,\n   644→            exitCode: code,\n   645→          });\n   646→        });\n   647→\n   648→        child.on('error', (err) => {\n   649→          resolve({\n   650→            success: false,\n   651→            containerName,\n   652→            message: `Failed to start docker: ${err.message}`,\n   653→          });\n   654→        });\n   655→      });\n   656→    }\n   657→  } catch (err) {\n   658→    return Promise.resolve({\n   659→      success: false,\n   660→      containerName,\n   661→      message: `Failed to run in docker: ${err.message}`,\n   662→    });\n   663→  }\n   664→}\n   665→\n   666→/**\n   667→ * Run command in the specified isolation environment\n   668→ * Supports stacked isolation where each level calls $ with remaining levels\n   669→ * @param {string} backend - Isolation environment (screen, tmux, docker, ssh)\n   670→ * @param {string} command - Command to execute\n   671→ * @param {object} options - Options\n   672→ * @returns {Promise<{success: boolean, message: string}>}\n   673→ */\n   674→function runIsolated(backend, command, options = {}) {\n   675→  // If stacked isolation, build the command for next level\n   676→  let effectiveCommand = command;\n   677→\n   678→  if (options.isolatedStack && options.isolatedStack.length > 1) {\n   679→    // Lazy load to avoid circular dependency\n   680→    const { buildNextLevelCommand } = require('./command-builder');\n   681→    effectiveCommand = buildNextLevelCommand(options, command);\n   682→\n   683→    if (DEBUG) {\n   684→      console.log(\n   685→        `[DEBUG] Stacked isolation - level command: ${effectiveCommand}`\n   686→      );\n   687→    }\n   688→  }\n   689→\n   690→  // Get current level option values\n   691→  const currentOptions = {\n   692→    ...options,\n   693→    // Use current level values from stacks\n   694→    image: options.imageStack ? options.imageStack[0] : options.image,\n   695→    endpoint: options.endpointStack\n   696→      ? options.endpointStack[0]\n   697→      : options.endpoint,\n   698→    session: options.sessionStack ? options.sessionStack[0] : options.session,\n   699→  };\n   700→\n   701→  switch (backend) {\n   702→    case 'screen':\n   703→      return runInScreen(effectiveCommand, currentOptions);\n   704→    case 'tmux':\n   705→      return runInTmux(effectiveCommand, currentOptions);\n   706→    case 'docker':\n   707→      return runInDocker(effectiveCommand, currentOptions);\n   708→    case 'ssh':\n   709→      return runInSsh(effectiveCommand, currentOptions);\n   710→    default:\n   711→      return Promise.resolve({\n   712→        success: false,\n   713→        message: `Unknown isolation environment: ${backend}`,\n   714→      });\n   715→  }\n   716→}\n   717→\n   718→const {\n   719→  getTimestamp,\n   720→  generateLogFilename,\n   721→  createLogHeader,\n   722→  createLogFooter,\n   723→  writeLogFile,\n   724→  getLogDir,\n   725→  createLogPath,\n   726→  runAsIsolatedUser,\n   727→} = require('./isolation-log-utils');\n   728→\n   729→module.exports = {\n   730→  isCommandAvailable,\n   731→  hasTTY,\n   732→  isInteractiveShellCommand,\n   733→  isShellInvocationWithArgs,\n   734→  buildShellWithArgsCmdArgs,\n   735→  buildDisplayCommand,\n   736→  detectShellInEnvironment,\n   737→  runInScreen,\n   738→  runInTmux,\n   739→  runInDocker,\n   740→  runInSsh,\n   741→  runIsolated,\n   742→  runAsIsolatedUser,\n   743→  wrapCommandWithUser,\n   744→  getTimestamp,\n   745→  generateLogFilename,\n   746→  createLogHeader,\n   747→  createLogFooter,\n   748→  writeLogFile,\n   749→  getLogDir,\n   750→  createLogPath,\n   751→  getScreenVersion,\n   752→  supportsLogfileOption,\n   753→  resetScreenVersionCache,\n   754→  canRunLinuxDockerImages,\n   755→  getDefaultDockerImage,\n   756→  dockerImageExists,\n   757→  dockerPullImage,\n   758→};\n   759→"
      }
    ]
  },
  "parent_tool_use_id": null,
  "session_id": "914de587-6218-4c93-b322-d791963b9891",
  "uuid": "5a2c9569-8972-4ace-80ab-94d0d9a4e058",
  "tool_use_result": {
    "type": "text",
    "file": {
      "filePath": "/tmp/gh-issue-solver-1773494815317/js/src/lib/isolation.js",
      "content": "/** Isolation Runners for start-command (screen, tmux, docker, ssh) */\n\nconst { execSync, spawn, spawnSync } = require('child_process');\nconst path = require('path');\nconst { generateSessionName } = require('./args-parser');\nconst outputBlocks = require('./output-blocks');\n\n// Debug mode from environment\nconst DEBUG =\n  process.env.START_DEBUG === '1' || process.env.START_DEBUG === 'true';\n\nconst {\n  getScreenVersion,\n  supportsLogfileOption,\n  runScreenWithLogCapture: _runScreenWithLogCapture,\n  resetScreenVersionCache,\n} = require('./screen-isolation');\n\n/**\n * Check if a command is available on the system\n * @param {string} command - Command to check\n * @returns {boolean} True if command is available\n */\nfunction isCommandAvailable(command) {\n  try {\n    const isWindows = process.platform === 'win32';\n    const checkCmd = isWindows ? 'where' : 'which';\n    execSync(`${checkCmd} ${command}`, { stdio: ['pipe', 'pipe', 'pipe'] });\n    return true;\n  } catch {\n    return false;\n  }\n}\n\n/** Get the shell to use for command execution. */\nfunction getShell() {\n  const isWindows = process.platform === 'win32';\n  const shell = isWindows ? 'cmd.exe' : process.env.SHELL || '/bin/sh';\n  const shellArg = isWindows ? '/c' : '-c';\n  return { shell, shellArg };\n}\n\n/**\n * Detect the best available shell in an isolation environment (docker/ssh)\n * Tries shells in order: bash, zsh, sh\n * @param {'docker'|'ssh'} environment - Isolation environment type\n * @param {object} options - Options for the isolation environment\n * @param {string} [shellPreference='auto'] - Shell preference: 'auto', 'bash', 'zsh', 'sh'\n * @returns {string} Shell path to use\n */\nfunction detectShellInEnvironment(\n  environment,\n  options,\n  shellPreference = 'auto'\n) {\n  // If a specific shell is requested (not auto), use it directly\n  if (shellPreference && shellPreference !== 'auto') {\n    if (DEBUG) {\n      console.log(`[DEBUG] Using forced shell: ${shellPreference}`);\n    }\n    return shellPreference;\n  }\n\n  // In auto mode, try shells in order of preference\n  const shellsToTry = ['bash', 'zsh', 'sh'];\n\n  if (environment === 'docker') {\n    const image = options.image;\n    if (!image) {\n      return 'sh';\n    }\n\n    for (const shell of shellsToTry) {\n      try {\n        const result = spawnSync(\n          'docker',\n          ['run', '--rm', image, 'sh', '-c', `command -v ${shell}`],\n          { encoding: 'utf8', stdio: ['pipe', 'pipe', 'pipe'] }\n        );\n        if (result.status === 0 && result.stdout.trim()) {\n          if (DEBUG) {\n            console.log(\n              `[DEBUG] Detected shell in docker image ${image}: ${result.stdout.trim()}`\n            );\n          }\n          return result.stdout.trim();\n        }\n      } catch {\n        // ignore; try next shell\n      }\n    }\n\n    if (DEBUG) {\n      console.log(\n        `[DEBUG] Could not detect shell in docker image ${image}, falling back to sh`\n      );\n    }\n    return 'sh';\n  }\n\n  if (environment === 'ssh') {\n    const endpoint = options.endpoint;\n    if (!endpoint) {\n      return 'sh';\n    }\n\n    try {\n      // Run a single SSH command to check for available shells in order\n      const checkCmd = shellsToTry.map((s) => `command -v ${s}`).join(' || ');\n      const result = spawnSync('ssh', [endpoint, checkCmd], {\n        encoding: 'utf8',\n        stdio: ['pipe', 'pipe', 'pipe'],\n      });\n      if (result.status === 0 && result.stdout.trim()) {\n        const detected = result.stdout.trim();\n        if (DEBUG) {\n          console.log(\n            `[DEBUG] Detected shell on SSH host ${endpoint}: ${detected}`\n          );\n        }\n        return detected;\n      }\n    } catch {\n      // Fall through to default\n    }\n\n    if (DEBUG) {\n      console.log(\n        `[DEBUG] Could not detect shell on SSH host ${endpoint}, falling back to sh`\n      );\n    }\n    return 'sh';\n  }\n\n  return 'sh';\n}\n\n/** Returns \"-i\" for bash/zsh (enables .bashrc sourcing), null otherwise. */\nfunction getShellInteractiveFlag(shellPath) {\n  const shellName = shellPath.split('/').pop();\n  return shellName === 'bash' || shellName === 'zsh' ? '-i' : null;\n}\nconst {\n  isInteractiveShellCommand,\n  isShellInvocationWithArgs,\n  buildShellWithArgsCmdArgs,\n  buildDisplayCommand,\n} = require('./shell-utils');\n\n/** Returns true if the current process has a TTY attached. */\nfunction hasTTY() {\n  return Boolean(process.stdin.isTTY && process.stdout.isTTY);\n}\n\n/** Wraps command with sudo -u if user is specified; returns command unchanged otherwise. */\nfunction wrapCommandWithUser(command, user) {\n  if (!user) {\n    return command;\n  }\n  // sudo -n: non-interactive (fails if password required); -u: run as user\n  return `sudo -n -u ${user} sh -c '${command.replace(/'/g, \"'\\\\''\")}'`;\n}\n\n/**\n * Run command in GNU Screen using detached mode with log capture.\n * Supports screen >= 4.5.1 (native -Logfile) and older versions (tee fallback).\n * @param {string} command - Command to execute\n * @param {string} sessionName - Session name\n * @param {object} shellInfo - Shell info from getShell()\n * @param {string|null} user - Username to run command as (optional)\n * @returns {Promise<{success: boolean, sessionName: string, message: string, output: string}>}\n */\nfunction runScreenWithLogCapture(command, sessionName, shellInfo, user = null) {\n  return _runScreenWithLogCapture(\n    command,\n    sessionName,\n    shellInfo,\n    user,\n    wrapCommandWithUser,\n    isInteractiveShellCommand\n  );\n}\n\n/**\n * Run command in GNU Screen\n * @param {string} command - Command to execute\n * @param {object} options - Options (session, detached, user, keepAlive)\n * @returns {Promise<{success: boolean, sessionName: string, message: string}>}\n */\nfunction runInScreen(command, options = {}) {\n  if (!isCommandAvailable('screen')) {\n    return Promise.resolve({\n      success: false,\n      sessionName: null,\n      message:\n        'screen is not installed. Install it with: sudo apt-get install screen (Debian/Ubuntu) or brew install screen (macOS)',\n    });\n  }\n\n  const sessionName = options.session || generateSessionName('screen');\n  const shellInfo = getShell();\n  const { shell, shellArg } = shellInfo;\n\n  try {\n    // Wrap command with user switch if specified\n    let effectiveCommand = wrapCommandWithUser(command, options.user);\n\n    if (options.detached) {\n      if (options.keepAlive) {\n        effectiveCommand = `${effectiveCommand}; exec ${shell}`;\n      }\n\n      const screenArgs = isInteractiveShellCommand(command)\n        ? ['-dmS', sessionName, ...command.trim().split(/\\s+/)]\n        : ['-dmS', sessionName, shell, shellArg, effectiveCommand];\n\n      if (DEBUG) {\n        console.log(`[DEBUG] Running: screen ${screenArgs.join(' ')}`);\n        console.log(`[DEBUG] keepAlive: ${options.keepAlive || false}`);\n      }\n\n      // Use spawnSync with array args (not execSync string) to avoid quoting issues (issue #25)\n      const result = spawnSync('screen', screenArgs, {\n        stdio: 'inherit',\n      });\n\n      if (result.error) {\n        throw result.error;\n      }\n\n      let message = `Command started in detached screen session: ${sessionName}`;\n      if (options.keepAlive) {\n        message += `\\nSession will stay alive after command completes.`;\n      } else {\n        message += `\\nSession will exit automatically after command completes.`;\n      }\n      message += `\\nReattach with: screen -r ${sessionName}`;\n\n      return Promise.resolve({\n        success: true,\n        sessionName,\n        message,\n      });\n    } else {\n      return runScreenWithLogCapture(\n        command,\n        sessionName,\n        shellInfo,\n        options.user\n      );\n    }\n  } catch (err) {\n    return Promise.resolve({\n      success: false,\n      sessionName,\n      message: `Failed to run in screen: ${err.message}`,\n    });\n  }\n}\n\n/**\n * Run command in tmux\n * @param {string} command - Command to execute\n * @param {object} options - Options (session, detached, user, keepAlive)\n * @returns {Promise<{success: boolean, sessionName: string, message: string}>}\n */\nfunction runInTmux(command, options = {}) {\n  if (!isCommandAvailable('tmux')) {\n    return Promise.resolve({\n      success: false,\n      sessionName: null,\n      message:\n        'tmux is not installed. Install it with: sudo apt-get install tmux (Debian/Ubuntu) or brew install tmux (macOS)',\n    });\n  }\n\n  const sessionName = options.session || generateSessionName('tmux');\n  const shellInfo = getShell();\n  const { shell } = shellInfo;\n\n  // Wrap command with user switch if specified\n  let effectiveCommand = wrapCommandWithUser(command, options.user);\n\n  try {\n    if (options.detached) {\n      if (options.keepAlive) {\n        effectiveCommand = `${effectiveCommand}; exec ${shell}`;\n      }\n\n      if (DEBUG) {\n        console.log(\n          `[DEBUG] Running: tmux new-session -d -s \"${sessionName}\" \"${effectiveCommand}\"`\n        );\n        console.log(`[DEBUG] keepAlive: ${options.keepAlive || false}`);\n      }\n\n      execSync(\n        `tmux new-session -d -s \"${sessionName}\" \"${effectiveCommand}\"`,\n        {\n          stdio: 'inherit',\n        }\n      );\n\n      let message = `Command started in detached tmux session: ${sessionName}`;\n      if (options.keepAlive) {\n        message += `\\nSession will stay alive after command completes.`;\n      } else {\n        message += `\\nSession will exit automatically after command completes.`;\n      }\n      message += `\\nReattach with: tmux attach -t ${sessionName}`;\n\n      return Promise.resolve({\n        success: true,\n        sessionName,\n        message,\n      });\n    } else {\n      if (DEBUG) {\n        console.log(\n          `[DEBUG] Running: tmux new-session -s \"${sessionName}\" \"${effectiveCommand}\"`\n        );\n      }\n\n      return new Promise((resolve) => {\n        const child = spawn(\n          'tmux',\n          ['new-session', '-s', sessionName, effectiveCommand],\n          {\n            stdio: 'inherit',\n          }\n        );\n\n        child.on('exit', (code) => {\n          resolve({\n            success: code === 0,\n            sessionName,\n            message: `Tmux session \"${sessionName}\" exited with code ${code}`,\n            exitCode: code,\n          });\n        });\n\n        child.on('error', (err) => {\n          resolve({\n            success: false,\n            sessionName,\n            message: `Failed to start tmux: ${err.message}`,\n          });\n        });\n      });\n    }\n  } catch (err) {\n    return Promise.resolve({\n      success: false,\n      sessionName,\n      message: `Failed to run in tmux: ${err.message}`,\n    });\n  }\n}\n\n/**\n * Run command over SSH on a remote server\n * @param {string} command - Command to execute\n * @param {object} options - Options (endpoint, session, detached)\n * @returns {Promise<{success: boolean, sessionName: string, message: string}>}\n */\nfunction runInSsh(command, options = {}) {\n  if (!isCommandAvailable('ssh')) {\n    return Promise.resolve({\n      success: false,\n      sessionName: null,\n      message:\n        'ssh is not installed. Install it with: sudo apt-get install openssh-client (Debian/Ubuntu) or brew install openssh (macOS)',\n    });\n  }\n\n  if (!options.endpoint) {\n    return Promise.resolve({\n      success: false,\n      sessionName: null,\n      message:\n        'SSH isolation requires --endpoint option to specify the remote server (e.g., user@host)',\n    });\n  }\n\n  const sessionName = options.session || generateSessionName('ssh');\n  const sshTarget = options.endpoint;\n\n  const shellToUse = detectShellInEnvironment('ssh', options, options.shell);\n  // In auto mode, SSH login shells already source startup files (.bashrc etc.);\n  // only wrap with an explicit shell when user requests one.\n  const useExplicitShell =\n    options.shell && options.shell !== 'auto' ? shellToUse : null;\n  const shellInteractiveFlag = useExplicitShell\n    ? getShellInteractiveFlag(useExplicitShell)\n    : null;\n\n  try {\n    if (options.detached) {\n      const remoteShell = useExplicitShell || shellToUse;\n      const shellInvocation = shellInteractiveFlag\n        ? `${remoteShell} ${shellInteractiveFlag}`\n        : remoteShell;\n      const remoteCommand = isInteractiveShellCommand(command)\n        ? `nohup ${command} > /tmp/${sessionName}.log 2>&1 &`\n        : `nohup ${shellInvocation} -c ${JSON.stringify(command)} > /tmp/${sessionName}.log 2>&1 &`;\n      const sshArgs = [sshTarget, remoteCommand];\n\n      if (DEBUG) {\n        console.log(`[DEBUG] Running: ssh ${sshArgs.join(' ')}`);\n        console.log(`[DEBUG] shell: ${shellInvocation}`);\n      }\n\n      const result = spawnSync('ssh', sshArgs, { stdio: 'inherit' });\n\n      if (result.error) {\n        throw result.error;\n      }\n\n      return Promise.resolve({\n        success: true,\n        sessionName,\n        message: `Command started in detached SSH session on ${sshTarget}\\nSession: ${sessionName}\\nView logs: ssh ${sshTarget} \"tail -f /tmp/${sessionName}.log\"`,\n      });\n    } else {\n      const extraFlags = shellInteractiveFlag ? [shellInteractiveFlag] : [];\n      const sshArgs = isInteractiveShellCommand(command)\n        ? [sshTarget, ...command.trim().split(/\\s+/)]\n        : useExplicitShell\n          ? [sshTarget, useExplicitShell, ...extraFlags, '-c', command]\n          : [sshTarget, command];\n\n      if (DEBUG) {\n        console.log(`[DEBUG] Running: ssh ${sshArgs.join(' ')}`);\n        console.log(`[DEBUG] shell: ${shellToUse}`);\n      }\n\n      return new Promise((resolve) => {\n        const child = spawn('ssh', sshArgs, {\n          stdio: 'inherit',\n        });\n\n        child.on('exit', (code) => {\n          resolve({\n            success: code === 0,\n            sessionName,\n            message: `SSH session \"${sessionName}\" on ${sshTarget} exited with code ${code}`,\n            exitCode: code,\n          });\n        });\n\n        child.on('error', (err) => {\n          resolve({\n            success: false,\n            sessionName,\n            message: `Failed to start SSH: ${err.message}`,\n          });\n        });\n      });\n    }\n  } catch (err) {\n    return Promise.resolve({\n      success: false,\n      sessionName,\n      message: `Failed to run over SSH: ${err.message}`,\n    });\n  }\n}\n\nconst {\n  dockerImageExists,\n  dockerPullImage,\n  isDockerAvailable,\n  getDefaultDockerImage,\n  canRunLinuxDockerImages,\n} = require('./docker-utils');\n\n/**\n * Run command in Docker container\n * @param {string} command - Command to execute\n * @param {object} options - Options (image, session/name, detached, user, keepAlive, autoRemoveDockerContainer)\n * @returns {Promise<{success: boolean, containerName: string, message: string}>}\n */\nfunction runInDocker(command, options = {}) {\n  const dockerNotAvailableError = !isCommandAvailable('docker')\n    ? 'Docker is not installed. Install Docker from https://docs.docker.com/get-docker/'\n    : !isDockerAvailable()\n      ? 'Docker is installed but not running. Please start Docker Desktop or the Docker daemon, then try again.'\n      : null;\n\n  if (dockerNotAvailableError) {\n    if (options.image) {\n      const pullCmd = `docker pull ${options.image}`;\n      console.log(outputBlocks.createVirtualCommandBlock(pullCmd));\n      console.log();\n      // ✗ and │ come from createFinishBlock() AFTER the error message (issue #89)\n    }\n    return Promise.resolve({\n      success: false,\n      containerName: null,\n      message: dockerNotAvailableError,\n    });\n  }\n\n  if (!options.image) {\n    return Promise.resolve({\n      success: false,\n      containerName: null,\n      message: 'Docker isolation requires --image option',\n    });\n  }\n\n  const containerName = options.session || generateSessionName('docker');\n  if (!dockerImageExists(options.image)) {\n    const pullResult = dockerPullImage(options.image);\n    if (!pullResult.success) {\n      return Promise.resolve({\n        success: false,\n        containerName: null,\n        message: `Failed to pull Docker image: ${options.image}`,\n        exitCode: 1,\n      });\n    }\n  }\n\n  const isBareShell = isInteractiveShellCommand(command);\n  const shellToUse = isBareShell\n    ? 'sh'\n    : detectShellInEnvironment('docker', options, options.shell);\n  const shellInteractiveFlag = getShellInteractiveFlag(shellToUse);\n\n  console.log(outputBlocks.createCommandLine(buildDisplayCommand(command)));\n  console.log();\n\n  try {\n    if (options.detached) {\n      const dockerArgs = ['run', '-d', '--name', containerName];\n      if (options.autoRemoveDockerContainer) {\n        dockerArgs.splice(2, 0, '--rm');\n      }\n\n      if (options.user) {\n        dockerArgs.push('--user', options.user);\n      }\n\n      const effectiveCommand = options.keepAlive\n        ? `${command}; exec ${shellToUse}`\n        : command;\n      const shellArgs = shellInteractiveFlag\n        ? [shellToUse, shellInteractiveFlag]\n        : [shellToUse];\n      const cmdArgs = isBareShell\n        ? command.trim().split(/\\s+/)\n        : isShellInvocationWithArgs(command)\n          ? buildShellWithArgsCmdArgs(effectiveCommand)\n          : [...shellArgs, '-c', effectiveCommand];\n      dockerArgs.push(options.image, ...cmdArgs);\n\n      if (DEBUG) {\n        console.log(`[DEBUG] Running: docker ${dockerArgs.join(' ')}`);\n        console.log(`[DEBUG] shell: ${shellToUse}`);\n        console.log(`[DEBUG] keepAlive: ${options.keepAlive || false}`);\n        console.log(\n          `[DEBUG] autoRemoveDockerContainer: ${options.autoRemoveDockerContainer || false}`\n        );\n      }\n\n      const containerId = execSync(`docker ${dockerArgs.join(' ')}`, {\n        encoding: 'utf8',\n      }).trim();\n\n      let message = `Command started in detached docker container: ${containerName}`;\n      message += `\\nContainer ID: ${containerId.substring(0, 12)}`;\n      if (options.keepAlive) {\n        message += `\\nContainer will stay alive after command completes.`;\n      } else {\n        message += `\\nContainer will exit automatically after command completes.`;\n      }\n      if (options.autoRemoveDockerContainer) {\n        message += `\\nContainer will be automatically removed after exit.`;\n      } else {\n        message += `\\nContainer filesystem will be preserved after exit.`;\n      }\n      message += `\\nAttach with: docker attach ${containerName}`;\n      message += `\\nView logs: docker logs ${containerName}`;\n\n      return Promise.resolve({\n        success: true,\n        containerName,\n        containerId,\n        message,\n      });\n    } else {\n      const dockerArgs = ['run', '-it', '--rm', '--name', containerName];\n      if (options.user) {\n        dockerArgs.push('--user', options.user);\n      }\n      if (DEBUG) {\n        console.log(`[DEBUG] shell: ${shellToUse}`);\n      }\n      const shellCmdArgs = shellInteractiveFlag\n        ? [shellToUse, shellInteractiveFlag]\n        : [shellToUse];\n      // Bare shell: pass directly with -i (avoids bash-inside-bash, issue #84; -i ensures interactive).\n      // Shell with -c: pass directly as argv (avoids double-wrapping and quote-stripping, issue #91).\n      let attachedCmdArgs;\n      if (isBareShell) {\n        const parts = command.trim().split(/\\s+/);\n        const bareFlag = getShellInteractiveFlag(parts[0]);\n        attachedCmdArgs =\n          bareFlag && !parts.includes(bareFlag)\n            ? [parts[0], bareFlag, ...parts.slice(1)]\n            : parts;\n      } else if (isShellInvocationWithArgs(command)) {\n        attachedCmdArgs = buildShellWithArgsCmdArgs(command);\n      } else {\n        attachedCmdArgs = [...shellCmdArgs, '-c', command];\n      }\n      dockerArgs.push(options.image, ...attachedCmdArgs);\n\n      if (DEBUG) {\n        console.log(`[DEBUG] Running: docker ${dockerArgs.join(' ')}`);\n      }\n\n      return new Promise((resolve) => {\n        const startTime = Date.now();\n        const child = spawn('docker', dockerArgs, { stdio: 'inherit' });\n\n        child.on('exit', (code) => {\n          const durationMs = Date.now() - startTime;\n          let message = `Docker container \"${containerName}\" exited with code ${code}`;\n          // Bare shell exited non-zero quickly → startup file error; suggest --norc (issue #84).\n          if (isBareShell && code !== 0 && durationMs < 3000) {\n            const shell0 = command.trim().split(/\\s+/)[0];\n            // prettier-ignore\n            const norc = path.basename(shell0) === 'zsh' ? '--no-rcs' : '--norc';\n            const hint = `Hint: The shell exited immediately — its startup file (.bashrc/.zshrc) may have errors.\\nTry skipping startup files: ${shell0} ${norc}`;\n            console.log(hint);\n            message += `\\n${hint}`;\n          }\n          resolve({\n            success: code === 0,\n            containerName,\n            message,\n            exitCode: code,\n          });\n        });\n\n        child.on('error', (err) => {\n          resolve({\n            success: false,\n            containerName,\n            message: `Failed to start docker: ${err.message}`,\n          });\n        });\n      });\n    }\n  } catch (err) {\n    return Promise.resolve({\n      success: false,\n      containerName,\n      message: `Failed to run in docker: ${err.message}`,\n    });\n  }\n}\n\n/**\n * Run command in the specified isolation environment\n * Supports stacked isolation where each level calls $ with remaining levels\n * @param {string} backend - Isolation environment (screen, tmux, docker, ssh)\n * @param {string} command - Command to execute\n * @param {object} options - Options\n * @returns {Promise<{success: boolean, message: string}>}\n */\nfunction runIsolated(backend, command, options = {}) {\n  // If stacked isolation, build the command for next level\n  let effectiveCommand = command;\n\n  if (options.isolatedStack && options.isolatedStack.length > 1) {\n    // Lazy load to avoid circular dependency\n    const { buildNextLevelCommand } = require('./command-builder');\n    effectiveCommand = buildNextLevelCommand(options, command);\n\n    if (DEBUG) {\n      console.log(\n        `[DEBUG] Stacked isolation - level command: ${effectiveCommand}`\n      );\n    }\n  }\n\n  // Get current level option values\n  const currentOptions = {\n    ...options,\n    // Use current level values from stacks\n    image: options.imageStack ? options.imageStack[0] : options.image,\n    endpoint: options.endpointStack\n      ? options.endpointStack[0]\n      : options.endpoint,\n    session: options.sessionStack ? options.sessionStack[0] : options.session,\n  };\n\n  switch (backend) {\n    case 'screen':\n      return runInScreen(effectiveCommand, currentOptions);\n    case 'tmux':\n      return runInTmux(effectiveCommand, currentOptions);\n    case 'docker':\n      return runInDocker(effectiveCommand, currentOptions);\n    case 'ssh':\n      return runInSsh(effectiveCommand, currentOptions);\n    default:\n      return Promise.resolve({\n        success: false,\n        message: `Unknown isolation environment: ${backend}`,\n      });\n  }\n}\n\nconst {\n  getTimestamp,\n  generateLogFilename,\n  createLogHeader,\n  createLogFooter,\n  writeLogFile,\n  getLogDir,\n  createLogPath,\n  runAsIsolatedUser,\n} = require('./isolation-log-utils');\n\nmodule.exports = {\n  isCommandAvailable,\n  hasTTY,\n  isInteractiveShellCommand,\n  isShellInvocationWithArgs,\n  buildShellWithArgsCmdArgs,\n  buildDisplayCommand,\n  detectShellInEnvironment,\n  runInScreen,\n  runInTmux,\n  runInDocker,\n  runInSsh,\n  runIsolated,\n  runAsIsolatedUser,\n  wrapCommandWithUser,\n  getTimestamp,\n  generateLogFilename,\n  createLogHeader,\n  createLogFooter,\n  writeLogFile,\n  getLogDir,\n  createLogPath,\n  getScreenVersion,\n  supportsLogfileOption,\n  resetScreenVersionCache,\n  canRunLinuxDockerImages,\n  getDefaultDockerImage,\n  dockerImageExists,\n  dockerPullImage,\n};\n",
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      "totalLines": 759
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        "text": "Now I have a clear picture. Let me analyze the issue deeply.\n\n**Key observations from the user's report:**\n1. macOS with `Screen version 4.00.03` → uses the **tee fallback** path (not native `-Logfile`)\n2. The output shows `$ agent --version` with blank output but `✓` (success)\n3. When running `agent --version` directly: outputs `0.13.2`\n\nLet me look at the issue comment more carefully. The user says the fix (from PR #97) \"didn't work.\" The first report used `--verbode` (typo), the second uses `--verbose`. Both show blank output between the `$` command line and `✓`.\n\nWait - looking at the output again more carefully:\n\n```\n$ agent --version\n\n\n✓\n```\n\nThe output is blank between the command echo and the success marker. The `--verbose` flag is a flag for the `$` command itself, not for `agent`. Let me look at how the output is actually displayed by checking the output-blocks module and what happens with the log file.\n\nLet me think about what could go wrong in the tee fallback path on macOS Screen 4.00.03:\n\n1. The command is wrapped as: `(agent --version) 2>&1 | tee \"/tmp/screen-output-xxx.log\"`\n2. Screen starts a detached session running `/bin/sh -c '(agent --version) 2>&1 | tee \"...\"'` \n3. The tool polls `screen -ls` until the session disappears\n4. Then reads the log file\n\nThe issue could be:\n- **Screen 4.00.03 on macOS may not properly capture output** in detached mode\n- The shell `/bin/sh` might not have `agent` in its PATH (since it doesn't source shell profiles like `.zshrc`)\n- The tee command might finish before the file is fully flushed\n\nLet me check the PATH issue - this is likely the root cause! When screen starts a detached session, it uses `/bin/sh -c`, which does NOT source the user's `.zshrc` or `.bash_profile`. The `agent` command is likely installed via `bun install -g` which adds it to a path that's only configured in the user's shell profile."
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        "content": "     1→/**\n     2→ * Output formatting utilities for nicely rendered command blocks\n     3→ *\n     4→ * Provides \"timeline\" format: a width-independent, lossless output format\n     5→ * that works in TTY, tmux, SSH, CI, and logs.\n     6→ *\n     7→ * Core concepts:\n     8→ * - `│` prefix → tool metadata (timeline marker)\n     9→ * - `$` → executed command (virtual or user command)\n    10→ * - No prefix → program output (stdout/stderr)\n    11→ * - Result marker (`✓` / `✗`) appears after output\n    12→ */\n    13→\n    14→// Timeline marker character (formerly called \"spine\")\n    15→const TIMELINE_MARKER = '│';\n    16→\n    17→// Alias for backward compatibility\n    18→const SPINE = TIMELINE_MARKER;\n    19→\n    20→// Result markers\n    21→const SUCCESS_MARKER = '✓';\n    22→const FAILURE_MARKER = '✗';\n    23→\n    24→/**\n    25→ * Create a metadata line with timeline marker prefix\n    26→ * @param {string} label - Label (e.g., 'session', 'start', 'exit')\n    27→ * @param {string} value - Value for the label\n    28→ * @returns {string} Formatted line with timeline marker prefix\n    29→ */\n    30→function createTimelineLine(label, value) {\n    31→  // Pad label to 10 characters for alignment\n    32→  const paddedLabel = label.padEnd(10);\n    33→  return `${TIMELINE_MARKER} ${paddedLabel}${value}`;\n    34→}\n    35→\n    36→/**\n    37→ * Alias for backward compatibility\n    38→ * @deprecated Use createTimelineLine instead\n    39→ */\n    40→function createSpineLine(label, value) {\n    41→  return createTimelineLine(label, value);\n    42→}\n    43→\n    44→/**\n    45→ * Create an empty timeline line (just the timeline marker character)\n    46→ * @returns {string} Empty timeline line\n    47→ */\n    48→function createEmptyTimelineLine() {\n    49→  return TIMELINE_MARKER;\n    50→}\n    51→\n    52→/**\n    53→ * Alias for backward compatibility\n    54→ * @deprecated Use createEmptyTimelineLine instead\n    55→ */\n    56→function createEmptySpineLine() {\n    57→  return createEmptyTimelineLine();\n    58→}\n    59→\n    60→/**\n    61→ * Create a command line with $ prefix\n    62→ * @param {string} command - The command being executed\n    63→ * @returns {string} Formatted command line\n    64→ */\n    65→function createCommandLine(command) {\n    66→  return `$ ${command}`;\n    67→}\n    68→\n    69→/**\n    70→ * Get the result marker based on exit code\n    71→ * @param {number} exitCode - Exit code (0 = success)\n    72→ * @returns {string} Result marker (✓ or ✗)\n    73→ */\n    74→function getResultMarker(exitCode) {\n    75→  return exitCode === 0 ? SUCCESS_MARKER : FAILURE_MARKER;\n    76→}\n    77→\n    78→/**\n    79→ * Create a virtual command block for setup steps (like docker pull)\n    80→ * Virtual commands are displayed separately in the timeline to show\n    81→ * intermediate steps that the tool performs automatically\n    82→ * @param {string} command - The virtual command being executed\n    83→ * @returns {string} Formatted command line\n    84→ */\n    85→function createVirtualCommandBlock(command) {\n    86→  return createCommandLine(command);\n    87→}\n    88→\n    89→/**\n    90→ * Create a result marker line for a virtual command\n    91→ * @param {boolean} success - Whether the virtual command succeeded\n    92→ * @returns {string} Result marker (✓ or ✗)\n    93→ */\n    94→function createVirtualCommandResult(success) {\n    95→  return success ? SUCCESS_MARKER : FAILURE_MARKER;\n    96→}\n    97→\n    98→/**\n    99→ * Create a separator line between virtual commands and user commands\n   100→ * @returns {string} Empty timeline line\n   101→ */\n   102→function createTimelineSeparator() {\n   103→  return createEmptyTimelineLine();\n   104→}\n   105→\n   106→/**\n   107→ * Parse isolation metadata from extraLines\n   108→ * Extracts key-value pairs from lines like \"[Isolation] Environment: docker, Mode: attached\"\n   109→ * @param {string[]} extraLines - Extra lines containing isolation info\n   110→ * @returns {object} Parsed isolation metadata\n   111→ */\n   112→function parseIsolationMetadata(extraLines) {\n   113→  const metadata = {\n   114→    isolation: null,\n   115→    mode: null,\n   116→    image: null,\n   117→    container: null,\n   118→    screen: null,\n   119→    session: null,\n   120→    endpoint: null,\n   121→    user: null,\n   122→  };\n   123→\n   124→  for (const line of extraLines) {\n   125→    // Parse [Isolation] Environment: docker, Mode: attached\n   126→    const envModeMatch = line.match(\n   127→      /\\[Isolation\\] Environment: (\\w+), Mode: (\\w+)/\n   128→    );\n   129→    if (envModeMatch) {\n   130→      metadata.isolation = envModeMatch[1];\n   131→      metadata.mode = envModeMatch[2];\n   132→      continue;\n   133→    }\n   134→\n   135→    // Parse [Isolation] Session: name\n   136→    const sessionMatch = line.match(/\\[Isolation\\] Session: (.+)/);\n   137→    if (sessionMatch) {\n   138→      metadata.session = sessionMatch[1];\n   139→      continue;\n   140→    }\n   141→\n   142→    // Parse [Isolation] Image: name\n   143→    const imageMatch = line.match(/\\[Isolation\\] Image: (.+)/);\n   144→    if (imageMatch) {\n   145→      metadata.image = imageMatch[1];\n   146→      continue;\n   147→    }\n   148→\n   149→    // Parse [Isolation] Endpoint: user@host\n   150→    const endpointMatch = line.match(/\\[Isolation\\] Endpoint: (.+)/);\n   151→    if (endpointMatch) {\n   152→      metadata.endpoint = endpointMatch[1];\n   153→      continue;\n   154→    }\n   155→\n   156→    // Parse [Isolation] User: name (isolated)\n   157→    const userMatch = line.match(/\\[Isolation\\] User: (\\w+)/);\n   158→    if (userMatch) {\n   159→      metadata.user = userMatch[1];\n   160→      continue;\n   161→    }\n   162→  }\n   163→\n   164→  return metadata;\n   165→}\n   166→\n   167→/**\n   168→ * Generate isolation metadata lines for timeline format\n   169→ * @param {object} metadata - Parsed isolation metadata\n   170→ * @param {string} [containerOrScreenName] - Container or screen session name\n   171→ * @returns {string[]} Array of timeline-formatted isolation lines\n   172→ */\n   173→function generateIsolationLines(metadata, containerOrScreenName = null) {\n   174→  const lines = [];\n   175→\n   176→  if (metadata.isolation) {\n   177→    lines.push(createTimelineLine('isolation', metadata.isolation));\n   178→  }\n   179→\n   180→  if (metadata.mode) {\n   181→    lines.push(createTimelineLine('mode', metadata.mode));\n   182→  }\n   183→\n   184→  if (metadata.image) {\n   185→    lines.push(createTimelineLine('image', metadata.image));\n   186→  }\n   187→\n   188→  // Use provided container/screen name or fall back to metadata.session\n   189→  if (metadata.isolation === 'docker') {\n   190→    const containerName = containerOrScreenName || metadata.session;\n   191→    if (containerName) {\n   192→      lines.push(createTimelineLine('container', containerName));\n   193→    }\n   194→  } else if (metadata.isolation === 'screen') {\n   195→    const screenName = containerOrScreenName || metadata.session;\n   196→    if (screenName) {\n   197→      lines.push(createTimelineLine('screen', screenName));\n   198→    }\n   199→  } else if (metadata.isolation === 'tmux') {\n   200→    const tmuxName = containerOrScreenName || metadata.session;\n   201→    if (tmuxName) {\n   202→      lines.push(createTimelineLine('tmux', tmuxName));\n   203→    }\n   204→  } else if (metadata.isolation === 'ssh') {\n   205→    if (metadata.endpoint) {\n   206→      lines.push(createTimelineLine('endpoint', metadata.endpoint));\n   207→    }\n   208→  }\n   209→\n   210→  if (metadata.user) {\n   211→    lines.push(createTimelineLine('user', metadata.user));\n   212→  }\n   213→\n   214→  return lines;\n   215→}\n   216→\n   217→/**\n   218→ * Create a start block for command execution using timeline format\n   219→ * @param {object} options - Options for the block\n   220→ * @param {string} options.sessionId - Session UUID\n   221→ * @param {string} options.timestamp - Timestamp string\n   222→ * @param {string} options.command - Command being executed\n   223→ * @param {string[]} [options.extraLines] - Additional lines with isolation info\n   224→ * @param {boolean} [options.deferCommand] - If true, omit command line (for virtual command handling)\n   225→ * @param {string} [options.style] - Ignored (kept for backward compatibility)\n   226→ * @param {number} [options.width] - Ignored (kept for backward compatibility)\n   227→ * @returns {string} Formatted start block in timeline format\n   228→ */\n   229→function createStartBlock(options) {\n   230→  const {\n   231→    sessionId,\n   232→    timestamp,\n   233→    command,\n   234→    extraLines = [],\n   235→    deferCommand = false,\n   236→  } = options;\n   237→\n   238→  const lines = [];\n   239→\n   240→  // Header: session and start time\n   241→  lines.push(createTimelineLine('session', sessionId));\n   242→  lines.push(createTimelineLine('start', timestamp));\n   243→\n   244→  // Parse and add isolation metadata if present\n   245→  const metadata = parseIsolationMetadata(extraLines);\n   246→\n   247→  if (metadata.isolation) {\n   248→    lines.push(createEmptyTimelineLine());\n   249→    lines.push(...generateIsolationLines(metadata));\n   250→  }\n   251→\n   252→  // Empty timeline line before command (always needed for separation)\n   253→  lines.push(createEmptyTimelineLine());\n   254→\n   255→  // Command line (unless deferred for virtual command handling)\n   256→  if (!deferCommand) {\n   257→    lines.push(createCommandLine(command));\n   258→  }\n   259→\n   260→  return lines.join('\\n');\n   261→}\n   262→\n   263→/**\n   264→ * Format duration in seconds with appropriate precision\n   265→ * @param {number} durationMs - Duration in milliseconds\n   266→ * @returns {string} Formatted duration string (e.g., \"0.273s\")\n   267→ */\n   268→function formatDuration(durationMs) {\n   269→  const seconds = durationMs / 1000;\n   270→  if (seconds < 0.001) {\n   271→    return '0.001s';\n   272→  } else if (seconds < 10) {\n   273→    // For durations under 10 seconds, show 3 decimal places\n   274→    return `${seconds.toFixed(3)}s`;\n   275→  } else if (seconds < 100) {\n   276→    return `${seconds.toFixed(2)}s`;\n   277→  } else {\n   278→    return `${seconds.toFixed(1)}s`;\n   279→  }\n   280→}\n   281→\n   282→/**\n   283→ * Create a finish block for command execution using timeline format\n   284→ *\n   285→ * Bottom block ordering rules:\n   286→ * 1. Result marker (✓ or ✗)\n   287→ * 2. finish timestamp\n   288→ * 3. duration\n   289→ * 4. exit code\n   290→ * 5. (repeated isolation metadata, if any)\n   291→ * 6. empty timeline line\n   292→ * 7. log path (always second-to-last)\n   293→ * 8. session ID (always last)\n   294→ *\n   295→ * @param {object} options - Options for the block\n   296→ * @param {string} options.sessionId - Session UUID\n   297→ * @param {string} options.timestamp - Timestamp string\n   298→ * @param {number} options.exitCode - Exit code\n   299→ * @param {string} options.logPath - Path to log file\n   300→ * @param {number} [options.durationMs] - Duration in milliseconds\n   301→ * @param {string} [options.resultMessage] - Result message (ignored in new format)\n   302→ * @param {string[]} [options.extraLines] - Isolation info for repetition in footer\n   303→ * @param {string} [options.style] - Ignored (kept for backward compatibility)\n   304→ * @param {number} [options.width] - Ignored (kept for backward compatibility)\n   305→ * @returns {string} Formatted finish block in timeline format\n   306→ */\n   307→function createFinishBlock(options) {\n   308→  const {\n   309→    sessionId,\n   310→    timestamp,\n   311→    exitCode,\n   312→    logPath,\n   313→    durationMs,\n   314→    extraLines = [],\n   315→  } = options;\n   316→\n   317→  const lines = [];\n   318→\n   319→  // Result marker appears first in footer (after program output)\n   320→  lines.push(getResultMarker(exitCode));\n   321→\n   322→  // Finish metadata\n   323→  lines.push(createTimelineLine('finish', timestamp));\n   324→\n   325→  if (durationMs !== undefined && durationMs !== null) {\n   326→    lines.push(createTimelineLine('duration', formatDuration(durationMs)));\n   327→  }\n   328→\n   329→  lines.push(createTimelineLine('exit', String(exitCode)));\n   330→\n   331→  // Repeat isolation metadata if present\n   332→  const metadata = parseIsolationMetadata(extraLines);\n   333→  if (metadata.isolation) {\n   334→    lines.push(createEmptyTimelineLine());\n   335→    lines.push(...generateIsolationLines(metadata));\n   336→  }\n   337→\n   338→  // Empty timeline line before final two entries\n   339→  lines.push(createEmptyTimelineLine());\n   340→\n   341→  // Log and session are ALWAYS last (in that order)\n   342→  lines.push(createTimelineLine('log', logPath));\n   343→  lines.push(createTimelineLine('session', sessionId));\n   344→\n   345→  return lines.join('\\n');\n   346→}\n   347→\n   348→/**\n   349→ * Escape a value for Links notation\n   350→ * Smart quoting: uses single or double quotes based on content\n   351→ * @param {string} str - String to escape\n   352→ * @returns {string} Escaped string\n   353→ */\n   354→function escapeForLinksNotation(str) {\n   355→  if (str === null || str === undefined) {\n   356→    return 'null';\n   357→  }\n   358→\n   359→  const value = String(str);\n   360→\n   361→  // Check for characters that need quoting\n   362→  const hasColon = value.includes(':');\n   363→  const hasDoubleQuotes = value.includes('\"');\n   364→  const hasSingleQuotes = value.includes(\"'\");\n   365→  const hasParens = value.includes('(') || value.includes(')');\n   366→  const hasNewline = value.includes('\\n');\n   367→  const hasSpace = value.includes(' ');\n   368→\n   369→  const needsQuoting =\n   370→    hasColon ||\n   371→    hasDoubleQuotes ||\n   372→    hasSingleQuotes ||\n   373→    hasParens ||\n   374→    hasNewline ||\n   375→    hasSpace;\n   376→\n   377→  if (!needsQuoting) {\n   378→    return value;\n   379→  }\n   380→\n   381→  if (hasDoubleQuotes && !hasSingleQuotes) {\n   382→    // Has \" but not ' → use single quotes\n   383→    return `'${value}'`;\n   384→  } else if (hasSingleQuotes && !hasDoubleQuotes) {\n   385→    // Has ' but not \" → use double quotes\n   386→    return `\"${value}\"`;\n   387→  } else if (hasDoubleQuotes && hasSingleQuotes) {\n   388→    // Has both \" and ' → choose wrapper with fewer escapes\n   389→    const doubleQuoteCount = (value.match(/\"/g) || []).length;\n   390→    const singleQuoteCount = (value.match(/'/g) || []).length;\n   391→\n   392→    if (singleQuoteCount <= doubleQuoteCount) {\n   393→      // Escape single quotes by doubling them\n   394→      const escaped = value.replace(/'/g, \"''\");\n   395→      return `'${escaped}'`;\n   396→    } else {\n   397→      // Escape double quotes by doubling them\n   398→      const escaped = value.replace(/\"/g, '\"\"');\n   399→      return `\"${escaped}\"`;\n   400→    }\n   401→  } else {\n   402→    // Has colon, parentheses, newlines, or spaces but no quotes\n   403→    return `\"${value}\"`;\n   404→  }\n   405→}\n   406→\n   407→/**\n   408→ * Format an object as nested Links notation\n   409→ * @param {object} obj - Object to format\n   410→ * @param {number} [indent=2] - Indentation level (spaces)\n   411→ * @param {number} [depth=0] - Current depth\n   412→ * @returns {string} Links notation formatted string\n   413→ */\n   414→function formatAsNestedLinksNotation(obj, indent = 2, depth = 0) {\n   415→  if (obj === null || obj === undefined) {\n   416→    return 'null';\n   417→  }\n   418→\n   419→  if (typeof obj !== 'object') {\n   420→    return escapeForLinksNotation(obj);\n   421→  }\n   422→\n   423→  if (Array.isArray(obj)) {\n   424→    // Format arrays\n   425→    if (obj.length === 0) {\n   426→      return '()';\n   427→    }\n   428→    const indentStr = ' '.repeat(indent * (depth + 1));\n   429→    const items = obj.map((item) => {\n   430→      const formatted = formatAsNestedLinksNotation(item, indent, depth + 1);\n   431→      return `${indentStr}${formatted}`;\n   432→    });\n   433→    return `(\\n${items.join('\\n')}\\n${' '.repeat(indent * depth)})`;\n   434→  }\n   435→\n   436→  // Format objects\n   437→  const entries = Object.entries(obj);\n   438→  if (entries.length === 0) {\n   439→    return '()';\n   440→  }\n   441→\n   442→  const indentStr = ' '.repeat(indent * (depth + 1));\n   443→  const lines = entries\n   444→    .filter(([, value]) => value !== null && value !== undefined)\n   445→    .map(([key, value]) => {\n   446→      if (typeof value === 'object') {\n   447→        const nested = formatAsNestedLinksNotation(value, indent, depth + 1);\n   448→        return `${indentStr}${key}\\n${nested}`;\n   449→      }\n   450→      const formattedValue = escapeForLinksNotation(value);\n   451→      return `${indentStr}${key} ${formattedValue}`;\n   452→    });\n   453→\n   454→  return lines.join('\\n');\n   455→}\n   456→\n   457→module.exports = {\n   458→  // Timeline format API (formerly \"status spine\")\n   459→  TIMELINE_MARKER,\n   460→  SPINE, // deprecated, use TIMELINE_MARKER\n   461→  SUCCESS_MARKER,\n   462→  FAILURE_MARKER,\n   463→  createTimelineLine,\n   464→  createSpineLine, // deprecated, use createTimelineLine\n   465→  createEmptyTimelineLine,\n   466→  createEmptySpineLine, // deprecated, use createEmptyTimelineLine\n   467→  createCommandLine,\n   468→  getResultMarker,\n   469→  parseIsolationMetadata,\n   470→  generateIsolationLines,\n   471→\n   472→  // Virtual command API (for multi-step execution)\n   473→  createVirtualCommandBlock,\n   474→  createVirtualCommandResult,\n   475→  createTimelineSeparator,\n   476→\n   477→  // Main block creation functions\n   478→  createStartBlock,\n   479→  createFinishBlock,\n   480→  formatDuration,\n   481→\n   482→  // Links notation utilities\n   483→  escapeForLinksNotation,\n   484→  formatAsNestedLinksNotation,\n   485→};\n   486→"
      }
    ]
  },
  "parent_tool_use_id": null,
  "session_id": "914de587-6218-4c93-b322-d791963b9891",
  "uuid": "38638e48-8262-4339-ade7-19c8c75a888d",
  "tool_use_result": {
    "type": "text",
    "file": {
      "filePath": "/tmp/gh-issue-solver-1773494815317/js/src/lib/output-blocks.js",
      "content": "/**\n * Output formatting utilities for nicely rendered command blocks\n *\n * Provides \"timeline\" format: a width-independent, lossless output format\n * that works in TTY, tmux, SSH, CI, and logs.\n *\n * Core concepts:\n * - `│` prefix → tool metadata (timeline marker)\n * - `$` → executed command (virtual or user command)\n * - No prefix → program output (stdout/stderr)\n * - Result marker (`✓` / `✗`) appears after output\n */\n\n// Timeline marker character (formerly called \"spine\")\nconst TIMELINE_MARKER = '│';\n\n// Alias for backward compatibility\nconst SPINE = TIMELINE_MARKER;\n\n// Result markers\nconst SUCCESS_MARKER = '✓';\nconst FAILURE_MARKER = '✗';\n\n/**\n * Create a metadata line with timeline marker prefix\n * @param {string} label - Label (e.g., 'session', 'start', 'exit')\n * @param {string} value - Value for the label\n * @returns {string} Formatted line with timeline marker prefix\n */\nfunction createTimelineLine(label, value) {\n  // Pad label to 10 characters for alignment\n  const paddedLabel = label.padEnd(10);\n  return `${TIMELINE_MARKER} ${paddedLabel}${value}`;\n}\n\n/**\n * Alias for backward compatibility\n * @deprecated Use createTimelineLine instead\n */\nfunction createSpineLine(label, value) {\n  return createTimelineLine(label, value);\n}\n\n/**\n * Create an empty timeline line (just the timeline marker character)\n * @returns {string} Empty timeline line\n */\nfunction createEmptyTimelineLine() {\n  return TIMELINE_MARKER;\n}\n\n/**\n * Alias for backward compatibility\n * @deprecated Use createEmptyTimelineLine instead\n */\nfunction createEmptySpineLine() {\n  return createEmptyTimelineLine();\n}\n\n/**\n * Create a command line with $ prefix\n * @param {string} command - The command being executed\n * @returns {string} Formatted command line\n */\nfunction createCommandLine(command) {\n  return `$ ${command}`;\n}\n\n/**\n * Get the result marker based on exit code\n * @param {number} exitCode - Exit code (0 = success)\n * @returns {string} Result marker (✓ or ✗)\n */\nfunction getResultMarker(exitCode) {\n  return exitCode === 0 ? SUCCESS_MARKER : FAILURE_MARKER;\n}\n\n/**\n * Create a virtual command block for setup steps (like docker pull)\n * Virtual commands are displayed separately in the timeline to show\n * intermediate steps that the tool performs automatically\n * @param {string} command - The virtual command being executed\n * @returns {string} Formatted command line\n */\nfunction createVirtualCommandBlock(command) {\n  return createCommandLine(command);\n}\n\n/**\n * Create a result marker line for a virtual command\n * @param {boolean} success - Whether the virtual command succeeded\n * @returns {string} Result marker (✓ or ✗)\n */\nfunction createVirtualCommandResult(success) {\n  return success ? SUCCESS_MARKER : FAILURE_MARKER;\n}\n\n/**\n * Create a separator line between virtual commands and user commands\n * @returns {string} Empty timeline line\n */\nfunction createTimelineSeparator() {\n  return createEmptyTimelineLine();\n}\n\n/**\n * Parse isolation metadata from extraLines\n * Extracts key-value pairs from lines like \"[Isolation] Environment: docker, Mode: attached\"\n * @param {string[]} extraLines - Extra lines containing isolation info\n * @returns {object} Parsed isolation metadata\n */\nfunction parseIsolationMetadata(extraLines) {\n  const metadata = {\n    isolation: null,\n    mode: null,\n    image: null,\n    container: null,\n    screen: null,\n    session: null,\n    endpoint: null,\n    user: null,\n  };\n\n  for (const line of extraLines) {\n    // Parse [Isolation] Environment: docker, Mode: attached\n    const envModeMatch = line.match(\n      /\\[Isolation\\] Environment: (\\w+), Mode: (\\w+)/\n    );\n    if (envModeMatch) {\n      metadata.isolation = envModeMatch[1];\n      metadata.mode = envModeMatch[2];\n      continue;\n    }\n\n    // Parse [Isolation] Session: name\n    const sessionMatch = line.match(/\\[Isolation\\] Session: (.+)/);\n    if (sessionMatch) {\n      metadata.session = sessionMatch[1];\n      continue;\n    }\n\n    // Parse [Isolation] Image: name\n    const imageMatch = line.match(/\\[Isolation\\] Image: (.+)/);\n    if (imageMatch) {\n      metadata.image = imageMatch[1];\n      continue;\n    }\n\n    // Parse [Isolation] Endpoint: user@host\n    const endpointMatch = line.match(/\\[Isolation\\] Endpoint: (.+)/);\n    if (endpointMatch) {\n      metadata.endpoint = endpointMatch[1];\n      continue;\n    }\n\n    // Parse [Isolation] User: name (isolated)\n    const userMatch = line.match(/\\[Isolation\\] User: (\\w+)/);\n    if (userMatch) {\n      metadata.user = userMatch[1];\n      continue;\n    }\n  }\n\n  return metadata;\n}\n\n/**\n * Generate isolation metadata lines for timeline format\n * @param {object} metadata - Parsed isolation metadata\n * @param {string} [containerOrScreenName] - Container or screen session name\n * @returns {string[]} Array of timeline-formatted isolation lines\n */\nfunction generateIsolationLines(metadata, containerOrScreenName = null) {\n  const lines = [];\n\n  if (metadata.isolation) {\n    lines.push(createTimelineLine('isolation', metadata.isolation));\n  }\n\n  if (metadata.mode) {\n    lines.push(createTimelineLine('mode', metadata.mode));\n  }\n\n  if (metadata.image) {\n    lines.push(createTimelineLine('image', metadata.image));\n  }\n\n  // Use provided container/screen name or fall back to metadata.session\n  if (metadata.isolation === 'docker') {\n    const containerName = containerOrScreenName || metadata.session;\n    if (containerName) {\n      lines.push(createTimelineLine('container', containerName));\n    }\n  } else if (metadata.isolation === 'screen') {\n    const screenName = containerOrScreenName || metadata.session;\n    if (screenName) {\n      lines.push(createTimelineLine('screen', screenName));\n    }\n  } else if (metadata.isolation === 'tmux') {\n    const tmuxName = containerOrScreenName || metadata.session;\n    if (tmuxName) {\n      lines.push(createTimelineLine('tmux', tmuxName));\n    }\n  } else if (metadata.isolation === 'ssh') {\n    if (metadata.endpoint) {\n      lines.push(createTimelineLine('endpoint', metadata.endpoint));\n    }\n  }\n\n  if (metadata.user) {\n    lines.push(createTimelineLine('user', metadata.user));\n  }\n\n  return lines;\n}\n\n/**\n * Create a start block for command execution using timeline format\n * @param {object} options - Options for the block\n * @param {string} options.sessionId - Session UUID\n * @param {string} options.timestamp - Timestamp string\n * @param {string} options.command - Command being executed\n * @param {string[]} [options.extraLines] - Additional lines with isolation info\n * @param {boolean} [options.deferCommand] - If true, omit command line (for virtual command handling)\n * @param {string} [options.style] - Ignored (kept for backward compatibility)\n * @param {number} [options.width] - Ignored (kept for backward compatibility)\n * @returns {string} Formatted start block in timeline format\n */\nfunction createStartBlock(options) {\n  const {\n    sessionId,\n    timestamp,\n    command,\n    extraLines = [],\n    deferCommand = false,\n  } = options;\n\n  const lines = [];\n\n  // Header: session and start time\n  lines.push(createTimelineLine('session', sessionId));\n  lines.push(createTimelineLine('start', timestamp));\n\n  // Parse and add isolation metadata if present\n  const metadata = parseIsolationMetadata(extraLines);\n\n  if (metadata.isolation) {\n    lines.push(createEmptyTimelineLine());\n    lines.push(...generateIsolationLines(metadata));\n  }\n\n  // Empty timeline line before command (always needed for separation)\n  lines.push(createEmptyTimelineLine());\n\n  // Command line (unless deferred for virtual command handling)\n  if (!deferCommand) {\n    lines.push(createCommandLine(command));\n  }\n\n  return lines.join('\\n');\n}\n\n/**\n * Format duration in seconds with appropriate precision\n * @param {number} durationMs - Duration in milliseconds\n * @returns {string} Formatted duration string (e.g., \"0.273s\")\n */\nfunction formatDuration(durationMs) {\n  const seconds = durationMs / 1000;\n  if (seconds < 0.001) {\n    return '0.001s';\n  } else if (seconds < 10) {\n    // For durations under 10 seconds, show 3 decimal places\n    return `${seconds.toFixed(3)}s`;\n  } else if (seconds < 100) {\n    return `${seconds.toFixed(2)}s`;\n  } else {\n    return `${seconds.toFixed(1)}s`;\n  }\n}\n\n/**\n * Create a finish block for command execution using timeline format\n *\n * Bottom block ordering rules:\n * 1. Result marker (✓ or ✗)\n * 2. finish timestamp\n * 3. duration\n * 4. exit code\n * 5. (repeated isolation metadata, if any)\n * 6. empty timeline line\n * 7. log path (always second-to-last)\n * 8. session ID (always last)\n *\n * @param {object} options - Options for the block\n * @param {string} options.sessionId - Session UUID\n * @param {string} options.timestamp - Timestamp string\n * @param {number} options.exitCode - Exit code\n * @param {string} options.logPath - Path to log file\n * @param {number} [options.durationMs] - Duration in milliseconds\n * @param {string} [options.resultMessage] - Result message (ignored in new format)\n * @param {string[]} [options.extraLines] - Isolation info for repetition in footer\n * @param {string} [options.style] - Ignored (kept for backward compatibility)\n * @param {number} [options.width] - Ignored (kept for backward compatibility)\n * @returns {string} Formatted finish block in timeline format\n */\nfunction createFinishBlock(options) {\n  const {\n    sessionId,\n    timestamp,\n    exitCode,\n    logPath,\n    durationMs,\n    extraLines = [],\n  } = options;\n\n  const lines = [];\n\n  // Result marker appears first in footer (after program output)\n  lines.push(getResultMarker(exitCode));\n\n  // Finish metadata\n  lines.push(createTimelineLine('finish', timestamp));\n\n  if (durationMs !== undefined && durationMs !== null) {\n    lines.push(createTimelineLine('duration', formatDuration(durationMs)));\n  }\n\n  lines.push(createTimelineLine('exit', String(exitCode)));\n\n  // Repeat isolation metadata if present\n  const metadata = parseIsolationMetadata(extraLines);\n  if (metadata.isolation) {\n    lines.push(createEmptyTimelineLine());\n    lines.push(...generateIsolationLines(metadata));\n  }\n\n  // Empty timeline line before final two entries\n  lines.push(createEmptyTimelineLine());\n\n  // Log and session are ALWAYS last (in that order)\n  lines.push(createTimelineLine('log', logPath));\n  lines.push(createTimelineLine('session', sessionId));\n\n  return lines.join('\\n');\n}\n\n/**\n * Escape a value for Links notation\n * Smart quoting: uses single or double quotes based on content\n * @param {string} str - String to escape\n * @returns {string} Escaped string\n */\nfunction escapeForLinksNotation(str) {\n  if (str === null || str === undefined) {\n    return 'null';\n  }\n\n  const value = String(str);\n\n  // Check for characters that need quoting\n  const hasColon = value.includes(':');\n  const hasDoubleQuotes = value.includes('\"');\n  const hasSingleQuotes = value.includes(\"'\");\n  const hasParens = value.includes('(') || value.includes(')');\n  const hasNewline = value.includes('\\n');\n  const hasSpace = value.includes(' ');\n\n  const needsQuoting =\n    hasColon ||\n    hasDoubleQuotes ||\n    hasSingleQuotes ||\n    hasParens ||\n    hasNewline ||\n    hasSpace;\n\n  if (!needsQuoting) {\n    return value;\n  }\n\n  if (hasDoubleQuotes && !hasSingleQuotes) {\n    // Has \" but not ' → use single quotes\n    return `'${value}'`;\n  } else if (hasSingleQuotes && !hasDoubleQuotes) {\n    // Has ' but not \" → use double quotes\n    return `\"${value}\"`;\n  } else if (hasDoubleQuotes && hasSingleQuotes) {\n    // Has both \" and ' → choose wrapper with fewer escapes\n    const doubleQuoteCount = (value.match(/\"/g) || []).length;\n    const singleQuoteCount = (value.match(/'/g) || []).length;\n\n    if (singleQuoteCount <= doubleQuoteCount) {\n      // Escape single quotes by doubling them\n      const escaped = value.replace(/'/g, \"''\");\n      return `'${escaped}'`;\n    } else {\n      // Escape double quotes by doubling them\n      const escaped = value.replace(/\"/g, '\"\"');\n      return `\"${escaped}\"`;\n    }\n  } else {\n    // Has colon, parentheses, newlines, or spaces but no quotes\n    return `\"${value}\"`;\n  }\n}\n\n/**\n * Format an object as nested Links notation\n * @param {object} obj - Object to format\n * @param {number} [indent=2] - Indentation level (spaces)\n * @param {number} [depth=0] - Current depth\n * @returns {string} Links notation formatted string\n */\nfunction formatAsNestedLinksNotation(obj, indent = 2, depth = 0) {\n  if (obj === null || obj === undefined) {\n    return 'null';\n  }\n\n  if (typeof obj !== 'object') {\n    return escapeForLinksNotation(obj);\n  }\n\n  if (Array.isArray(obj)) {\n    // Format arrays\n    if (obj.length === 0) {\n      return '()';\n    }\n    const indentStr = ' '.repeat(indent * (depth + 1));\n    const items = obj.map((item) => {\n      const formatted = formatAsNestedLinksNotation(item, indent, depth + 1);\n      return `${indentStr}${formatted}`;\n    });\n    return `(\\n${items.join('\\n')}\\n${' '.repeat(indent * depth)})`;\n  }\n\n  // Format objects\n  const entries = Object.entries(obj);\n  if (entries.length === 0) {\n    return '()';\n  }\n\n  const indentStr = ' '.repeat(indent * (depth + 1));\n  const lines = entries\n    .filter(([, value]) => value !== null && value !== undefined)\n    .map(([key, value]) => {\n      if (typeof value === 'object') {\n        const nested = formatAsNestedLinksNotation(value, indent, depth + 1);\n        return `${indentStr}${key}\\n${nested}`;\n      }\n      const formattedValue = escapeForLinksNotation(value);\n      return `${indentStr}${key} ${formattedValue}`;\n    });\n\n  return lines.join('\\n');\n}\n\nmodule.exports = {\n  // Timeline format API (formerly \"status spine\")\n  TIMELINE_MARKER,\n  SPINE, // deprecated, use TIMELINE_MARKER\n  SUCCESS_MARKER,\n  FAILURE_MARKER,\n  createTimelineLine,\n  createSpineLine, // deprecated, use createTimelineLine\n  createEmptyTimelineLine,\n  createEmptySpineLine, // deprecated, use createEmptyTimelineLine\n  createCommandLine,\n  getResultMarker,\n  parseIsolationMetadata,\n  generateIsolationLines,\n\n  // Virtual command API (for multi-step execution)\n  createVirtualCommandBlock,\n  createVirtualCommandResult,\n  createTimelineSeparator,\n\n  // Main block creation functions\n  createStartBlock,\n  createFinishBlock,\n  formatDuration,\n\n  // Links notation utilities\n  escapeForLinksNotation,\n  formatAsNestedLinksNotation,\n};\n",
      "numLines": 486,
      "startLine": 1,
      "totalLines": 486
    }
  }
 }
 [2026-03-14T13:29:14.566Z] [INFO] [log_f6b8ce] sending request {
 [2026-03-14T13:29:14.566Z] [INFO]   method: 'post',
 [2026-03-14T13:29:14.566Z] [INFO]   url: 'https://api.anthropic.com/v1/messages?beta=true',
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        "text": "Now I have enough understanding. Let me look at the actual log output the user shows. Looking at the issue report output:\n\n```\n$ agent --version\n\n\n✓\n```\n\nThere's NO output between the `$ agent --version` command line and `✓`. The key question is: **why is `agent --version` not producing any output when run inside a screen session?**\n\nLet me think about this carefully:\n\n1. Screen 4.00.03 on macOS → uses **tee fallback**: `(/bin/sh -c 'agent --version') 2>&1 | tee \"/tmp/screen-output-xxx.log\"`\n2. But wait - the actual shell used is `getShell()` which returns `process.env.SHELL || '/bin/sh'` and shell arg `-c`\n3. On macOS with zsh as default shell, the screen command would be: `screen -dmS <name> /bin/zsh -c \"(agent --version) 2>&1 | tee /tmp/...\"`\n\nActually, looking more carefully at the tee fallback in `screen-isolation.js` line 158:\n```js\neffectiveCommand = `(${effectiveCommand}) 2>&1 | tee \"${logFile}\"`;\n```\n\nAnd then line 162:\n```js\nscreenArgs = ['-dmS', sessionName, shell, shellArg, effectiveCommand];\n```\n\nSo the screen command becomes:\n```\nscreen -dmS <session> /bin/zsh -c '(agent --version) 2>&1 | tee \"/tmp/...\"'\n```\n\nBut **screen creates a detached session** (`-d`). In detached mode, screen may not have a proper terminal, and the `-m` flag forces creation even without a terminal. The issue could be that:\n\n1. **PATH issue**: When screen starts a new shell with `-c`, it may not source `.zshrc`/`.bash_profile`, so `agent` may not be in PATH.\n2. **But wait** - the user's output shows exit code 0 and `✓`, which means the command succeeded. If `agent` wasn't found, it would exit with a non-zero code.\n\nActually, looking even more carefully at the user's output:\n```\n$ agent --version\n\n\n✓\n│ finish    2026-03-14 13:25:30.713\n│ duration  0.509s\n│ exit      0\n```\n\nExit code is 0! So `agent --version` ran successfully, but its output wasn't captured. This strongly points to a **log file race condition** or a **screen logging issue** where the output is written to the terminal inside screen but never makes it to the log file.\n\nLet me check if there's a fundamental issue with the tee fallback on macOS screen 4.00.03. The critical thing is: in a `screen -dm` (detached) session, there may be no terminal attached, and `tee` writes to both stdout AND file. But in a detached screen session, stdout goes... nowhere visible. The log file should still get the output though.\n\nLet me also look at the user's first report with `--verbode` (typo) and then correct `--verbose`. The `--verbose` flag in the CLI is `START_VERBOSE`, but `DEBUG` in screen-isolation.js uses `START_DEBUG`. Let me check.\n\nLooking at the verbose/debug output the user gets with `--verbose`, I see the isolation info lines but no `[DEBUG]` output about screen commands. This means the `START_DEBUG` env var isn't set. The `--verbose` flag sets `config.verbose` but that's different from `START_DEBUG`.\n\nLet me now search for how the `--verbose` flag relates to screen debug."
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 [2026-03-14T13:29:43.683Z] [INFO]     iterator: [AsyncGeneratorFunction: _],
 [2026-03-14T13:29:43.683Z] [INFO]     controller: AbortController { signal: AbortSignal { aborted: false } }
 [2026-03-14T13:29:43.683Z] [INFO]   },
 [2026-03-14T13:29:43.683Z] [INFO]   durationMs: 1099
 [2026-03-14T13:29:43.684Z] [INFO] }
 [2026-03-14T13:29:44.963Z] [INFO] {
  "type": "assistant",
  "message": {
    "model": "claude-opus-4-6",
    "id": "msg_01Bq8Et7TzUNkpRKnjR3o1Sb",
    "type": "message",
    "role": "assistant",
    "content": [
      {
        "type": "text",
        "text": "The `--verbose` flag in the user's command `$ --isolated screen --verbose -- agent --version` is parsed through `parseArgs`. Let me check how it's parsed."
      }
    ],
    "stop_reason": null,
    "stop_sequence": null,
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      "service_tier": "standard",
      "inference_geo": "not_available"
    },
    "context_management": null
  },
  "parent_tool_use_id": null,
  "session_id": "914de587-6218-4c93-b322-d791963b9891",
  "uuid": "6c9daee5-c575-4b49-becd-cb045c05f0cd"
 }
 [2026-03-14T13:29:45.175Z] [INFO] {
  "type": "assistant",
  "message": {
    "model": "claude-opus-4-6",
    "id": "msg_01Bq8Et7TzUNkpRKnjR3o1Sb",
    "type": "message",
    "role": "assistant",
    "content": [
      {
        "type": "tool_use",
        "id": "toolu_01DdLZYFLzqE5QTizmHnZnzE",
        "name": "Read",
        "input": {
          "file_path": "/tmp/gh-issue-solver-1773494815317/js/src/lib/args-parser.js"
        },
        "caller": {
          "type": "direct"
        }
      }
    ],
    "stop_reason": null,
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      "input_tokens": 1,
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  "uuid": "e9490b96-d143-490b-9b54-d20f6e589a18"
 }
 [2026-03-14T13:29:45.194Z] [INFO] {
  "type": "user",
  "message": {
    "role": "user",
    "content": [
      {
        "tool_use_id": "toolu_01DdLZYFLzqE5QTizmHnZnzE",
        "type": "tool_result",
        "content": "     1→/**\n     2→ * Argument Parser for start-command wrapper options\n     3→ *\n     4→ * Supports two syntax patterns:\n     5→ * 1. $ [wrapper-options] -- [command-options]\n     6→ * 2. $ [wrapper-options] command [command-options]\n     7→ *\n     8→ * Wrapper Options:\n     9→ * --isolated, -i <backend>         Run in isolated environment (screen, tmux, docker, ssh)\n    10→ * --attached, -a                   Run in attached mode (foreground)\n    11→ * --detached, -d                   Run in detached mode (background)\n    12→ * --session, -s <name>             Session name for isolation\n    13→ * --image <image>                  Docker image (optional, defaults to OS-matched image)\n    14→ * --endpoint <endpoint>            SSH endpoint (required for ssh isolation, e.g., user@host)\n    15→ * --isolated-user, -u [username]   Create isolated user with same permissions (auto-generated name if not specified)\n    16→ * --keep-user                      Keep isolated user after command completes (don't delete)\n    17→ * --keep-alive, -k                 Keep isolation environment alive after command exits\n    18→ * --auto-remove-docker-container   Automatically remove docker container after exit (disabled by default)\n    19→ * --shell <shell>                  Shell to use in isolation environments: auto, bash, zsh, sh (default: auto)\n    20→ * --use-command-stream             Use command-stream library for command execution (experimental)\n    21→ * --status <uuid>                  Show status of a previous command execution by UUID\n    22→ * --output-format <format>         Output format for status (links-notation, json, text)\n    23→ * --cleanup                        Clean up stale \"executing\" records (processes that crashed or were killed)\n    24→ * --cleanup-dry-run                Show stale records that would be cleaned up (without actually cleaning)\n    25→ */\n    26→\n    27→const { getDefaultDockerImage } = require('./docker-utils');\n    28→const { parseSequence, isSequence } = require('./sequence-parser');\n    29→\n    30→// Debug mode from environment\n    31→const DEBUG =\n    32→  process.env.START_DEBUG === '1' || process.env.START_DEBUG === 'true';\n    33→\n    34→/**\n    35→ * Valid isolation environments\n    36→ */\n    37→const VALID_BACKENDS = ['screen', 'tmux', 'docker', 'ssh'];\n    38→\n    39→/**\n    40→ * Valid shell options for --shell\n    41→ */\n    42→const VALID_SHELLS = ['auto', 'bash', 'zsh', 'sh'];\n    43→\n    44→/**\n    45→ * Maximum depth for isolation stacking\n    46→ */\n    47→const MAX_ISOLATION_DEPTH = 7;\n    48→\n    49→/**\n    50→ * Valid output formats for --status\n    51→ */\n    52→const VALID_OUTPUT_FORMATS = ['links-notation', 'json', 'text'];\n    53→\n    54→/**\n    55→ * UUID v4 regex pattern for validation\n    56→ */\n    57→const UUID_REGEX =\n    58→  /^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;\n    59→\n    60→/**\n    61→ * Check if a string is a valid UUID v4\n    62→ * @param {string} str - String to validate\n    63→ * @returns {boolean} True if valid UUID v4\n    64→ */\n    65→function isValidUUID(str) {\n    66→  return UUID_REGEX.test(str);\n    67→}\n    68→\n    69→/**\n    70→ * Generate a UUID v4\n    71→ * @returns {string} A new UUID v4 string\n    72→ */\n    73→function generateUUID() {\n    74→  // Try to use Node.js/Bun crypto module\n    75→  try {\n    76→    const crypto = require('crypto');\n    77→    return crypto.randomUUID();\n    78→  } catch {\n    79→    // Fallback for environments without crypto.randomUUID\n    80→    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {\n    81→      const r = (Math.random() * 16) | 0;\n    82→      const v = c === 'x' ? r : (r & 0x3) | 0x8;\n    83→      return v.toString(16);\n    84→    });\n    85→  }\n    86→}\n    87→\n    88→/**\n    89→ * Parse --isolated value, handling both single values and sequences\n    90→ * @param {string} value - Isolation value (e.g., \"docker\" or \"screen ssh docker\")\n    91→ * @param {object} options - Options object to populate\n    92→ */\n    93→function parseIsolatedValue(value, options) {\n    94→  if (isSequence(value)) {\n    95→    // Multi-value sequence (e.g., \"screen ssh docker\")\n    96→    const backends = parseSequence(value).map((v) =>\n    97→      v ? v.toLowerCase() : null\n    98→    );\n    99→    options.isolatedStack = backends;\n   100→    options.isolated = backends[0]; // Current level\n   101→  } else {\n   102→    // Single value (backward compatible)\n   103→    const backend = value.toLowerCase();\n   104→    options.isolated = backend;\n   105→    options.isolatedStack = [backend];\n   106→  }\n   107→}\n   108→\n   109→/**\n   110→ * Parse --image value, handling both single values and sequences\n   111→ * @param {string} value - Image value (e.g., \"ubuntu:22.04\" or \"_ _ ubuntu:22.04\")\n   112→ * @param {object} options - Options object to populate\n   113→ */\n   114→function parseImageValue(value, options) {\n   115→  if (isSequence(value)) {\n   116→    // Multi-value sequence with placeholders\n   117→    const images = parseSequence(value);\n   118→    options.imageStack = images;\n   119→    options.image = images[0]; // Current level\n   120→  } else {\n   121→    // Single value - will be distributed later during validation\n   122→    options.image = value;\n   123→    options.imageStack = null; // Will be populated during validation\n   124→  }\n   125→}\n   126→\n   127→/**\n   128→ * Parse --endpoint value, handling both single values and sequences\n   129→ * @param {string} value - Endpoint value (e.g., \"user@host\" or \"_ user@host1 _ user@host2\")\n   130→ * @param {object} options - Options object to populate\n   131→ */\n   132→function parseEndpointValue(value, options) {\n   133→  if (isSequence(value)) {\n   134→    // Multi-value sequence with placeholders\n   135→    const endpoints = parseSequence(value);\n   136→    options.endpointStack = endpoints;\n   137→    options.endpoint = endpoints[0]; // Current level\n   138→  } else {\n   139→    // Single value - will be distributed later during validation\n   140→    options.endpoint = value;\n   141→    options.endpointStack = null; // Will be populated during validation\n   142→  }\n   143→}\n   144→\n   145→/**\n   146→ * Parse command line arguments into wrapper options and command\n   147→ * @param {string[]} args - Array of command line arguments\n   148→ * @returns {{wrapperOptions: object, command: string, rawCommand: string[]}}\n   149→ */\n   150→function parseArgs(args) {\n   151→  const wrapperOptions = {\n   152→    isolated: null, // Isolation environment: screen, tmux, docker, ssh (current level)\n   153→    isolatedStack: null, // Full isolation stack for multi-level isolation (e.g., [\"screen\", \"ssh\", \"docker\"])\n   154→    attached: false, // Run in attached mode\n   155→    detached: false, // Run in detached mode\n   156→    session: null, // Session name (current level)\n   157→    sessionStack: null, // Session names for each level\n   158→    sessionId: null, // Session ID (UUID) for tracking - auto-generated if not provided\n   159→    image: null, // Docker image (current level)\n   160→    imageStack: null, // Docker images for each level (with nulls for non-docker levels)\n   161→    endpoint: null, // SSH endpoint (current level, e.g., user@host)\n   162→    endpointStack: null, // SSH endpoints for each level (with nulls for non-ssh levels)\n   163→    user: false, // Create isolated user\n   164→    userName: null, // Optional custom username for isolated user\n   165→    keepUser: false, // Keep isolated user after command completes (don't delete)\n   166→    keepAlive: false, // Keep environment alive after command exits\n   167→    autoRemoveDockerContainer: false, // Auto-remove docker container after exit\n   168→    shell: 'auto', // Shell to use in isolation environments: auto, bash, zsh, sh\n   169→    useCommandStream: false, // Use command-stream library for command execution\n   170→    status: null, // UUID to show status for\n   171→    outputFormat: null, // Output format for status (links-notation, json, text)\n   172→    cleanup: false, // Clean up stale \"executing\" records\n   173→    cleanupDryRun: false, // Show what would be cleaned without actually cleaning\n   174→  };\n   175→\n   176→  let commandArgs = [];\n   177→  let i = 0;\n   178→\n   179→  // Find the separator '--' or detect where command starts\n   180→  const separatorIndex = args.indexOf('--');\n   181→\n   182→  if (separatorIndex !== -1) {\n   183→    // Pattern 1: explicit separator\n   184→    const wrapperArgs = args.slice(0, separatorIndex);\n   185→    commandArgs = args.slice(separatorIndex + 1);\n   186→\n   187→    parseWrapperArgs(wrapperArgs, wrapperOptions);\n   188→  } else {\n   189→    // Pattern 2: parse until we hit a non-option argument\n   190→    while (i < args.length) {\n   191→      const arg = args[i];\n   192→\n   193→      if (arg.startsWith('-')) {\n   194→        const consumed = parseOption(args, i, wrapperOptions);\n   195→        if (consumed === 0) {\n   196→          // Unknown option, treat rest as command\n   197→          commandArgs = args.slice(i);\n   198→          break;\n   199→        }\n   200→        i += consumed;\n   201→      } else {\n   202→        // Non-option argument, rest is command\n   203→        commandArgs = args.slice(i);\n   204→        break;\n   205→      }\n   206→    }\n   207→  }\n   208→\n   209→  // Validate options\n   210→  validateOptions(wrapperOptions);\n   211→\n   212→  return {\n   213→    wrapperOptions,\n   214→    command: commandArgs.join(' '),\n   215→    rawCommand: commandArgs,\n   216→  };\n   217→}\n   218→\n   219→/**\n   220→ * Parse wrapper arguments\n   221→ * @param {string[]} args - Wrapper arguments\n   222→ * @param {object} options - Options object to populate\n   223→ */\n   224→function parseWrapperArgs(args, options) {\n   225→  let i = 0;\n   226→  while (i < args.length) {\n   227→    const consumed = parseOption(args, i, options);\n   228→    if (consumed === 0) {\n   229→      if (DEBUG) {\n   230→        console.warn(`Unknown wrapper option: ${args[i]}`);\n   231→      }\n   232→      i++;\n   233→    } else {\n   234→      i += consumed;\n   235→    }\n   236→  }\n   237→}\n   238→\n   239→/**\n   240→ * Parse a single option from args array\n   241→ * @param {string[]} args - Arguments array\n   242→ * @param {number} index - Current index\n   243→ * @param {object} options - Options object to populate\n   244→ * @returns {number} Number of arguments consumed (0 if not recognized)\n   245→ */\n   246→function parseOption(args, index, options) {\n   247→  const arg = args[index];\n   248→\n   249→  // --isolated or -i\n   250→  if (arg === '--isolated' || arg === '-i') {\n   251→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   252→      const value = args[index + 1];\n   253→      parseIsolatedValue(value, options);\n   254→      return 2;\n   255→    } else {\n   256→      throw new Error(\n   257→        `Option ${arg} requires a backend argument (screen, tmux, docker, ssh)`\n   258→      );\n   259→    }\n   260→  }\n   261→\n   262→  // --isolated=<value>\n   263→  if (arg.startsWith('--isolated=')) {\n   264→    const value = arg.split('=')[1];\n   265→    parseIsolatedValue(value, options);\n   266→    return 1;\n   267→  }\n   268→\n   269→  // --attached or -a\n   270→  if (arg === '--attached' || arg === '-a') {\n   271→    options.attached = true;\n   272→    return 1;\n   273→  }\n   274→\n   275→  // --detached or -d\n   276→  if (arg === '--detached' || arg === '-d') {\n   277→    options.detached = true;\n   278→    return 1;\n   279→  }\n   280→\n   281→  // --session or -s\n   282→  if (arg === '--session' || arg === '-s') {\n   283→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   284→      options.session = args[index + 1];\n   285→      return 2;\n   286→    } else {\n   287→      throw new Error(`Option ${arg} requires a session name argument`);\n   288→    }\n   289→  }\n   290→\n   291→  // --session=<value>\n   292→  if (arg.startsWith('--session=')) {\n   293→    options.session = arg.split('=')[1];\n   294→    return 1;\n   295→  }\n   296→\n   297→  // --image (for docker) - supports sequence for stacked isolation\n   298→  if (arg === '--image') {\n   299→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   300→      const value = args[index + 1];\n   301→      parseImageValue(value, options);\n   302→      return 2;\n   303→    } else {\n   304→      throw new Error(`Option ${arg} requires an image name argument`);\n   305→    }\n   306→  }\n   307→\n   308→  // --image=<value>\n   309→  if (arg.startsWith('--image=')) {\n   310→    const value = arg.split('=')[1];\n   311→    parseImageValue(value, options);\n   312→    return 1;\n   313→  }\n   314→\n   315→  // --endpoint (for ssh) - supports sequence for stacked isolation\n   316→  if (arg === '--endpoint') {\n   317→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   318→      const value = args[index + 1];\n   319→      parseEndpointValue(value, options);\n   320→      return 2;\n   321→    } else {\n   322→      throw new Error(`Option ${arg} requires an endpoint argument`);\n   323→    }\n   324→  }\n   325→\n   326→  // --endpoint=<value>\n   327→  if (arg.startsWith('--endpoint=')) {\n   328→    const value = arg.split('=')[1];\n   329→    parseEndpointValue(value, options);\n   330→    return 1;\n   331→  }\n   332→\n   333→  // --isolated-user or -u [optional-username] - creates isolated user with same permissions\n   334→  if (arg === '--isolated-user' || arg === '-u') {\n   335→    options.user = true;\n   336→    // Check if next arg is an optional username (not starting with -)\n   337→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   338→      // Check if next arg looks like a username (not a command)\n   339→      const nextArg = args[index + 1];\n   340→      // If next arg matches username format, consume it\n   341→      if (/^[a-zA-Z0-9_-]+$/.test(nextArg) && nextArg.length <= 32) {\n   342→        options.userName = nextArg;\n   343→        return 2;\n   344→      }\n   345→    }\n   346→    return 1;\n   347→  }\n   348→\n   349→  // --isolated-user=<value>\n   350→  if (arg.startsWith('--isolated-user=')) {\n   351→    options.user = true;\n   352→    options.userName = arg.split('=')[1];\n   353→    return 1;\n   354→  }\n   355→\n   356→  // --keep-user - keep isolated user after command completes\n   357→  if (arg === '--keep-user') {\n   358→    options.keepUser = true;\n   359→    return 1;\n   360→  }\n   361→\n   362→  // --keep-alive or -k\n   363→  if (arg === '--keep-alive' || arg === '-k') {\n   364→    options.keepAlive = true;\n   365→    return 1;\n   366→  }\n   367→\n   368→  // --auto-remove-docker-container\n   369→  if (arg === '--auto-remove-docker-container') {\n   370→    options.autoRemoveDockerContainer = true;\n   371→    return 1;\n   372→  }\n   373→\n   374→  // --shell <shell>\n   375→  if (arg === '--shell') {\n   376→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   377→      options.shell = args[index + 1].toLowerCase();\n   378→      return 2;\n   379→    } else {\n   380→      throw new Error(\n   381→        `Option ${arg} requires a shell argument (auto, bash, zsh, sh)`\n   382→      );\n   383→    }\n   384→  }\n   385→\n   386→  // --shell=<value>\n   387→  if (arg.startsWith('--shell=')) {\n   388→    options.shell = arg.split('=')[1].toLowerCase();\n   389→    return 1;\n   390→  }\n   391→\n   392→  // --use-command-stream\n   393→  if (arg === '--use-command-stream') {\n   394→    options.useCommandStream = true;\n   395→    return 1;\n   396→  }\n   397→\n   398→  // --session-id or --session-name (alias) <uuid>\n   399→  if (arg === '--session-id' || arg === '--session-name') {\n   400→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   401→      options.sessionId = args[index + 1];\n   402→      return 2;\n   403→    } else {\n   404→      throw new Error(`Option ${arg} requires a UUID argument`);\n   405→    }\n   406→  }\n   407→\n   408→  // --session-id=<value> or --session-name=<value>\n   409→  if (arg.startsWith('--session-id=') || arg.startsWith('--session-name=')) {\n   410→    options.sessionId = arg.split('=')[1];\n   411→    return 1;\n   412→  }\n   413→\n   414→  // --status <uuid>\n   415→  if (arg === '--status') {\n   416→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   417→      options.status = args[index + 1];\n   418→      return 2;\n   419→    } else {\n   420→      throw new Error(`Option ${arg} requires a UUID argument`);\n   421→    }\n   422→  }\n   423→\n   424→  // --status=<value>\n   425→  if (arg.startsWith('--status=')) {\n   426→    options.status = arg.split('=')[1];\n   427→    return 1;\n   428→  }\n   429→\n   430→  // --output-format <format>\n   431→  if (arg === '--output-format') {\n   432→    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n   433→      options.outputFormat = args[index + 1].toLowerCase();\n   434→      return 2;\n   435→    } else {\n   436→      throw new Error(`Option ${arg} requires a format argument`);\n   437→    }\n   438→  }\n   439→\n   440→  // --output-format=<value>\n   441→  if (arg.startsWith('--output-format=')) {\n   442→    options.outputFormat = arg.split('=')[1].toLowerCase();\n   443→    return 1;\n   444→  }\n   445→\n   446→  // --cleanup\n   447→  if (arg === '--cleanup') {\n   448→    options.cleanup = true;\n   449→    return 1;\n   450→  }\n   451→\n   452→  // --cleanup-dry-run\n   453→  if (arg === '--cleanup-dry-run') {\n   454→    options.cleanup = true;\n   455→    options.cleanupDryRun = true;\n   456→    return 1;\n   457→  }\n   458→\n   459→  // Not a recognized wrapper option\n   460→  return 0;\n   461→}\n   462→\n   463→/**\n   464→ * Validate parsed options\n   465→ * @param {object} options - Parsed options\n   466→ * @throws {Error} If options are invalid\n   467→ */\n   468→function validateOptions(options) {\n   469→  // Check attached and detached conflict\n   470→  if (options.attached && options.detached) {\n   471→    throw new Error(\n   472→      'Cannot use both --attached and --detached at the same time. Please choose only one mode.'\n   473→    );\n   474→  }\n   475→\n   476→  // Validate isolation environment (with stacking support)\n   477→  if (options.isolated !== null) {\n   478→    const stack = options.isolatedStack || [options.isolated];\n   479→    const stackDepth = stack.length;\n   480→\n   481→    // Check depth limit\n   482→    if (stackDepth > MAX_ISOLATION_DEPTH) {\n   483→      throw new Error(\n   484→        `Isolation stack too deep: ${stackDepth} levels (max: ${MAX_ISOLATION_DEPTH})`\n   485→      );\n   486→    }\n   487→\n   488→    // Validate each backend in the stack\n   489→    for (const backend of stack) {\n   490→      if (backend && !VALID_BACKENDS.includes(backend)) {\n   491→        throw new Error(\n   492→          `Invalid isolation environment: \"${backend}\". Valid options are: ${VALID_BACKENDS.join(', ')}`\n   493→        );\n   494→      }\n   495→    }\n   496→\n   497→    // Distribute single option values across stack if needed\n   498→    if (options.image && !options.imageStack) {\n   499→      // Single image value - replicate for all levels\n   500→      options.imageStack = Array(stackDepth).fill(options.image);\n   501→    }\n   502→\n   503→    if (options.endpoint && !options.endpointStack) {\n   504→      // Single endpoint value - replicate for all levels\n   505→      options.endpointStack = Array(stackDepth).fill(options.endpoint);\n   506→    }\n   507→\n   508→    // Validate stack lengths match\n   509→    if (options.imageStack && options.imageStack.length !== stackDepth) {\n   510→      throw new Error(\n   511→        `--image has ${options.imageStack.length} value(s) but isolation stack has ${stackDepth} level(s). ` +\n   512→          `Use underscores (_) as placeholders for levels that don't need this option.`\n   513→      );\n   514→    }\n   515→\n   516→    if (options.endpointStack && options.endpointStack.length !== stackDepth) {\n   517→      throw new Error(\n   518→        `--endpoint has ${options.endpointStack.length} value(s) but isolation stack has ${stackDepth} level(s). ` +\n   519→          `Use underscores (_) as placeholders for levels that don't need this option.`\n   520→      );\n   521→    }\n   522→\n   523→    // Validate each level has required options\n   524→    for (let i = 0; i < stackDepth; i++) {\n   525→      const backend = stack[i];\n   526→\n   527→      // Docker uses --image or defaults to OS-matched image\n   528→      if (backend === 'docker') {\n   529→        const image = options.imageStack\n   530→          ? options.imageStack[i]\n   531→          : options.image;\n   532→        if (!image) {\n   533→          // Apply default image\n   534→          if (!options.imageStack) {\n   535→            options.imageStack = Array(stackDepth).fill(null);\n   536→          }\n   537→          options.imageStack[i] = getDefaultDockerImage();\n   538→        }\n   539→      }\n   540→\n   541→      // SSH requires --endpoint\n   542→      if (backend === 'ssh') {\n   543→        const endpoint = options.endpointStack\n   544→          ? options.endpointStack[i]\n   545→          : options.endpoint;\n   546→        if (!endpoint) {\n   547→          throw new Error(\n   548→            `SSH isolation at level ${i + 1} requires --endpoint option. ` +\n   549→              `Use a sequence like --endpoint \"_ user@host _\" to specify endpoints for specific levels.`\n   550→          );\n   551→        }\n   552→      }\n   553→    }\n   554→\n   555→    // Set current level values for backward compatibility\n   556→    options.image = options.imageStack ? options.imageStack[0] : options.image;\n   557→    options.endpoint = options.endpointStack\n   558→      ? options.endpointStack[0]\n   559→      : options.endpoint;\n   560→\n   561→    // Validate option compatibility with current level (for backward compatible error messages)\n   562→    const currentBackend = stack[0];\n   563→\n   564→    // Image is only valid if stack contains docker\n   565→    if (options.image && !stack.includes('docker')) {\n   566→      throw new Error(\n   567→        '--image option is only valid when isolation stack includes docker'\n   568→      );\n   569→    }\n   570→\n   571→    // Endpoint is only valid if stack contains ssh\n   572→    if (options.endpoint && !stack.includes('ssh')) {\n   573→      throw new Error(\n   574→        '--endpoint option is only valid when isolation stack includes ssh'\n   575→      );\n   576→    }\n   577→\n   578→    // Auto-remove-docker-container is only valid with docker in stack\n   579→    if (options.autoRemoveDockerContainer && !stack.includes('docker')) {\n   580→      throw new Error(\n   581→        '--auto-remove-docker-container option is only valid when isolation stack includes docker'\n   582→      );\n   583→    }\n   584→\n   585→    // User isolation is not supported with Docker as first level\n   586→    if (options.user && currentBackend === 'docker') {\n   587→      throw new Error(\n   588→        '--isolated-user is not supported with Docker as the first isolation level. ' +\n   589→          'Docker uses its own user namespace for isolation.'\n   590→      );\n   591→    }\n   592→  } else {\n   593→    // Validate options that require isolation when no isolation is specified\n   594→    if (options.autoRemoveDockerContainer) {\n   595→      throw new Error(\n   596→        '--auto-remove-docker-container option is only valid when isolation stack includes docker'\n   597→      );\n   598→    }\n   599→    if (options.image) {\n   600→      throw new Error(\n   601→        '--image option is only valid when isolation stack includes docker'\n   602→      );\n   603→    }\n   604→    if (options.endpoint) {\n   605→      throw new Error(\n   606→        '--endpoint option is only valid when isolation stack includes ssh'\n   607→      );\n   608→    }\n   609→  }\n   610→\n   611→  // Session name is only valid with isolation\n   612→  if (options.session && !options.isolated) {\n   613→    throw new Error('--session option is only valid with --isolated');\n   614→  }\n   615→\n   616→  // Keep-alive is only valid with isolation\n   617→  if (options.keepAlive && !options.isolated) {\n   618→    throw new Error('--keep-alive option is only valid with --isolated');\n   619→  }\n   620→\n   621→  // User isolation validation\n   622→  if (options.user) {\n   623→    // Validate custom username if provided\n   624→    if (options.userName) {\n   625→      if (!/^[a-zA-Z0-9_-]+$/.test(options.userName)) {\n   626→        throw new Error(\n   627→          `Invalid username format for --isolated-user: \"${options.userName}\". Username should contain only letters, numbers, hyphens, and underscores.`\n   628→        );\n   629→      }\n   630→      if (options.userName.length > 32) {\n   631→        throw new Error(\n   632→          `Username too long for --isolated-user: \"${options.userName}\". Maximum length is 32 characters.`\n   633→        );\n   634→      }\n   635→    }\n   636→  }\n   637→\n   638→  // Keep-user validation\n   639→  if (options.keepUser && !options.user) {\n   640→    throw new Error('--keep-user option is only valid with --isolated-user');\n   641→  }\n   642→\n   643→  // Validate output format\n   644→  if (options.outputFormat !== null && options.outputFormat !== undefined) {\n   645→    if (!VALID_OUTPUT_FORMATS.includes(options.outputFormat)) {\n   646→      throw new Error(\n   647→        `Invalid output format: \"${options.outputFormat}\". Valid options are: ${VALID_OUTPUT_FORMATS.join(', ')}`\n   648→      );\n   649→    }\n   650→  }\n   651→\n   652→  // Output format is only valid with --status\n   653→  if (options.outputFormat && !options.status) {\n   654→    throw new Error('--output-format option is only valid with --status');\n   655→  }\n   656→\n   657→  // Validate shell option\n   658→  if (options.shell !== null && options.shell !== undefined) {\n   659→    if (!VALID_SHELLS.includes(options.shell)) {\n   660→      throw new Error(\n   661→        `Invalid shell: \"${options.shell}\". Valid options are: ${VALID_SHELLS.join(', ')}`\n   662→      );\n   663→    }\n   664→  }\n   665→\n   666→  // Validate session ID is a valid UUID if provided\n   667→  if (options.sessionId !== null && options.sessionId !== undefined) {\n   668→    if (!isValidUUID(options.sessionId)) {\n   669→      throw new Error(\n   670→        `Invalid session ID: \"${options.sessionId}\". Session ID must be a valid UUID v4.`\n   671→      );\n   672→    }\n   673→  }\n   674→}\n   675→\n   676→/**\n   677→ * Generate a unique session name\n   678→ * @param {string} [prefix='start'] - Prefix for the session name\n   679→ * @returns {string} Generated session name\n   680→ */\n   681→function generateSessionName(prefix = 'start') {\n   682→  const timestamp = Date.now();\n   683→  const random = Math.random().toString(36).substring(2, 8);\n   684→  return `${prefix}-${timestamp}-${random}`;\n   685→}\n   686→\n   687→/**\n   688→ * Check if any isolation options are present\n   689→ * @param {object} options - Parsed wrapper options\n   690→ * @returns {boolean} True if isolation is requested\n   691→ */\n   692→function hasIsolation(options) {\n   693→  return options.isolated !== null;\n   694→}\n   695→\n   696→/**\n   697→ * Get the effective mode for isolation\n   698→ * Multiplexers default to attached, docker defaults to attached\n   699→ * @param {object} options - Parsed wrapper options\n   700→ * @returns {'attached'|'detached'} The effective mode\n   701→ */\n   702→function getEffectiveMode(options) {\n   703→  if (options.detached) {\n   704→    return 'detached';\n   705→  }\n   706→  // Default to attached for all backends\n   707→  return 'attached';\n   708→}\n   709→\n   710→/**\n   711→ * Check if isolation stack has multiple levels\n   712→ * @param {object} options - Parsed wrapper options\n   713→ * @returns {boolean} True if multiple isolation levels\n   714→ */\n   715→function hasStackedIsolation(options) {\n   716→  return options.isolatedStack && options.isolatedStack.length > 1;\n   717→}\n   718→\n   719→module.exports = {\n   720→  parseArgs,\n   721→  validateOptions,\n   722→  generateSessionName,\n   723→  hasIsolation,\n   724→  hasStackedIsolation,\n   725→  getEffectiveMode,\n   726→  isValidUUID,\n   727→  generateUUID,\n   728→  VALID_BACKENDS,\n   729→  VALID_OUTPUT_FORMATS,\n   730→  VALID_SHELLS,\n   731→  MAX_ISOLATION_DEPTH,\n   732→};\n   733→"
      }
    ]
  },
  "parent_tool_use_id": null,
  "session_id": "914de587-6218-4c93-b322-d791963b9891",
  "uuid": "20d1b71d-2603-4da9-be10-7ba9136eba1c",
  "tool_use_result": {
    "type": "text",
    "file": {
      "filePath": "/tmp/gh-issue-solver-1773494815317/js/src/lib/args-parser.js",
      "content": "/**\n * Argument Parser for start-command wrapper options\n *\n * Supports two syntax patterns:\n * 1. $ [wrapper-options] -- [command-options]\n * 2. $ [wrapper-options] command [command-options]\n *\n * Wrapper Options:\n * --isolated, -i <backend>         Run in isolated environment (screen, tmux, docker, ssh)\n * --attached, -a                   Run in attached mode (foreground)\n * --detached, -d                   Run in detached mode (background)\n * --session, -s <name>             Session name for isolation\n * --image <image>                  Docker image (optional, defaults to OS-matched image)\n * --endpoint <endpoint>            SSH endpoint (required for ssh isolation, e.g., user@host)\n * --isolated-user, -u [username]   Create isolated user with same permissions (auto-generated name if not specified)\n * --keep-user                      Keep isolated user after command completes (don't delete)\n * --keep-alive, -k                 Keep isolation environment alive after command exits\n * --auto-remove-docker-container   Automatically remove docker container after exit (disabled by default)\n * --shell <shell>                  Shell to use in isolation environments: auto, bash, zsh, sh (default: auto)\n * --use-command-stream             Use command-stream library for command execution (experimental)\n * --status <uuid>                  Show status of a previous command execution by UUID\n * --output-format <format>         Output format for status (links-notation, json, text)\n * --cleanup                        Clean up stale \"executing\" records (processes that crashed or were killed)\n * --cleanup-dry-run                Show stale records that would be cleaned up (without actually cleaning)\n */\n\nconst { getDefaultDockerImage } = require('./docker-utils');\nconst { parseSequence, isSequence } = require('./sequence-parser');\n\n// Debug mode from environment\nconst DEBUG =\n  process.env.START_DEBUG === '1' || process.env.START_DEBUG === 'true';\n\n/**\n * Valid isolation environments\n */\nconst VALID_BACKENDS = ['screen', 'tmux', 'docker', 'ssh'];\n\n/**\n * Valid shell options for --shell\n */\nconst VALID_SHELLS = ['auto', 'bash', 'zsh', 'sh'];\n\n/**\n * Maximum depth for isolation stacking\n */\nconst MAX_ISOLATION_DEPTH = 7;\n\n/**\n * Valid output formats for --status\n */\nconst VALID_OUTPUT_FORMATS = ['links-notation', 'json', 'text'];\n\n/**\n * UUID v4 regex pattern for validation\n */\nconst UUID_REGEX =\n  /^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;\n\n/**\n * Check if a string is a valid UUID v4\n * @param {string} str - String to validate\n * @returns {boolean} True if valid UUID v4\n */\nfunction isValidUUID(str) {\n  return UUID_REGEX.test(str);\n}\n\n/**\n * Generate a UUID v4\n * @returns {string} A new UUID v4 string\n */\nfunction generateUUID() {\n  // Try to use Node.js/Bun crypto module\n  try {\n    const crypto = require('crypto');\n    return crypto.randomUUID();\n  } catch {\n    // Fallback for environments without crypto.randomUUID\n    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {\n      const r = (Math.random() * 16) | 0;\n      const v = c === 'x' ? r : (r & 0x3) | 0x8;\n      return v.toString(16);\n    });\n  }\n}\n\n/**\n * Parse --isolated value, handling both single values and sequences\n * @param {string} value - Isolation value (e.g., \"docker\" or \"screen ssh docker\")\n * @param {object} options - Options object to populate\n */\nfunction parseIsolatedValue(value, options) {\n  if (isSequence(value)) {\n    // Multi-value sequence (e.g., \"screen ssh docker\")\n    const backends = parseSequence(value).map((v) =>\n      v ? v.toLowerCase() : null\n    );\n    options.isolatedStack = backends;\n    options.isolated = backends[0]; // Current level\n  } else {\n    // Single value (backward compatible)\n    const backend = value.toLowerCase();\n    options.isolated = backend;\n    options.isolatedStack = [backend];\n  }\n}\n\n/**\n * Parse --image value, handling both single values and sequences\n * @param {string} value - Image value (e.g., \"ubuntu:22.04\" or \"_ _ ubuntu:22.04\")\n * @param {object} options - Options object to populate\n */\nfunction parseImageValue(value, options) {\n  if (isSequence(value)) {\n    // Multi-value sequence with placeholders\n    const images = parseSequence(value);\n    options.imageStack = images;\n    options.image = images[0]; // Current level\n  } else {\n    // Single value - will be distributed later during validation\n    options.image = value;\n    options.imageStack = null; // Will be populated during validation\n  }\n}\n\n/**\n * Parse --endpoint value, handling both single values and sequences\n * @param {string} value - Endpoint value (e.g., \"user@host\" or \"_ user@host1 _ user@host2\")\n * @param {object} options - Options object to populate\n */\nfunction parseEndpointValue(value, options) {\n  if (isSequence(value)) {\n    // Multi-value sequence with placeholders\n    const endpoints = parseSequence(value);\n    options.endpointStack = endpoints;\n    options.endpoint = endpoints[0]; // Current level\n  } else {\n    // Single value - will be distributed later during validation\n    options.endpoint = value;\n    options.endpointStack = null; // Will be populated during validation\n  }\n}\n\n/**\n * Parse command line arguments into wrapper options and command\n * @param {string[]} args - Array of command line arguments\n * @returns {{wrapperOptions: object, command: string, rawCommand: string[]}}\n */\nfunction parseArgs(args) {\n  const wrapperOptions = {\n    isolated: null, // Isolation environment: screen, tmux, docker, ssh (current level)\n    isolatedStack: null, // Full isolation stack for multi-level isolation (e.g., [\"screen\", \"ssh\", \"docker\"])\n    attached: false, // Run in attached mode\n    detached: false, // Run in detached mode\n    session: null, // Session name (current level)\n    sessionStack: null, // Session names for each level\n    sessionId: null, // Session ID (UUID) for tracking - auto-generated if not provided\n    image: null, // Docker image (current level)\n    imageStack: null, // Docker images for each level (with nulls for non-docker levels)\n    endpoint: null, // SSH endpoint (current level, e.g., user@host)\n    endpointStack: null, // SSH endpoints for each level (with nulls for non-ssh levels)\n    user: false, // Create isolated user\n    userName: null, // Optional custom username for isolated user\n    keepUser: false, // Keep isolated user after command completes (don't delete)\n    keepAlive: false, // Keep environment alive after command exits\n    autoRemoveDockerContainer: false, // Auto-remove docker container after exit\n    shell: 'auto', // Shell to use in isolation environments: auto, bash, zsh, sh\n    useCommandStream: false, // Use command-stream library for command execution\n    status: null, // UUID to show status for\n    outputFormat: null, // Output format for status (links-notation, json, text)\n    cleanup: false, // Clean up stale \"executing\" records\n    cleanupDryRun: false, // Show what would be cleaned without actually cleaning\n  };\n\n  let commandArgs = [];\n  let i = 0;\n\n  // Find the separator '--' or detect where command starts\n  const separatorIndex = args.indexOf('--');\n\n  if (separatorIndex !== -1) {\n    // Pattern 1: explicit separator\n    const wrapperArgs = args.slice(0, separatorIndex);\n    commandArgs = args.slice(separatorIndex + 1);\n\n    parseWrapperArgs(wrapperArgs, wrapperOptions);\n  } else {\n    // Pattern 2: parse until we hit a non-option argument\n    while (i < args.length) {\n      const arg = args[i];\n\n      if (arg.startsWith('-')) {\n        const consumed = parseOption(args, i, wrapperOptions);\n        if (consumed === 0) {\n          // Unknown option, treat rest as command\n          commandArgs = args.slice(i);\n          break;\n        }\n        i += consumed;\n      } else {\n        // Non-option argument, rest is command\n        commandArgs = args.slice(i);\n        break;\n      }\n    }\n  }\n\n  // Validate options\n  validateOptions(wrapperOptions);\n\n  return {\n    wrapperOptions,\n    command: commandArgs.join(' '),\n    rawCommand: commandArgs,\n  };\n}\n\n/**\n * Parse wrapper arguments\n * @param {string[]} args - Wrapper arguments\n * @param {object} options - Options object to populate\n */\nfunction parseWrapperArgs(args, options) {\n  let i = 0;\n  while (i < args.length) {\n    const consumed = parseOption(args, i, options);\n    if (consumed === 0) {\n      if (DEBUG) {\n        console.warn(`Unknown wrapper option: ${args[i]}`);\n      }\n      i++;\n    } else {\n      i += consumed;\n    }\n  }\n}\n\n/**\n * Parse a single option from args array\n * @param {string[]} args - Arguments array\n * @param {number} index - Current index\n * @param {object} options - Options object to populate\n * @returns {number} Number of arguments consumed (0 if not recognized)\n */\nfunction parseOption(args, index, options) {\n  const arg = args[index];\n\n  // --isolated or -i\n  if (arg === '--isolated' || arg === '-i') {\n    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n      const value = args[index + 1];\n      parseIsolatedValue(value, options);\n      return 2;\n    } else {\n      throw new Error(\n        `Option ${arg} requires a backend argument (screen, tmux, docker, ssh)`\n      );\n    }\n  }\n\n  // --isolated=<value>\n  if (arg.startsWith('--isolated=')) {\n    const value = arg.split('=')[1];\n    parseIsolatedValue(value, options);\n    return 1;\n  }\n\n  // --attached or -a\n  if (arg === '--attached' || arg === '-a') {\n    options.attached = true;\n    return 1;\n  }\n\n  // --detached or -d\n  if (arg === '--detached' || arg === '-d') {\n    options.detached = true;\n    return 1;\n  }\n\n  // --session or -s\n  if (arg === '--session' || arg === '-s') {\n    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n      options.session = args[index + 1];\n      return 2;\n    } else {\n      throw new Error(`Option ${arg} requires a session name argument`);\n    }\n  }\n\n  // --session=<value>\n  if (arg.startsWith('--session=')) {\n    options.session = arg.split('=')[1];\n    return 1;\n  }\n\n  // --image (for docker) - supports sequence for stacked isolation\n  if (arg === '--image') {\n    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n      const value = args[index + 1];\n      parseImageValue(value, options);\n      return 2;\n    } else {\n      throw new Error(`Option ${arg} requires an image name argument`);\n    }\n  }\n\n  // --image=<value>\n  if (arg.startsWith('--image=')) {\n    const value = arg.split('=')[1];\n    parseImageValue(value, options);\n    return 1;\n  }\n\n  // --endpoint (for ssh) - supports sequence for stacked isolation\n  if (arg === '--endpoint') {\n    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n      const value = args[index + 1];\n      parseEndpointValue(value, options);\n      return 2;\n    } else {\n      throw new Error(`Option ${arg} requires an endpoint argument`);\n    }\n  }\n\n  // --endpoint=<value>\n  if (arg.startsWith('--endpoint=')) {\n    const value = arg.split('=')[1];\n    parseEndpointValue(value, options);\n    return 1;\n  }\n\n  // --isolated-user or -u [optional-username] - creates isolated user with same permissions\n  if (arg === '--isolated-user' || arg === '-u') {\n    options.user = true;\n    // Check if next arg is an optional username (not starting with -)\n    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n      // Check if next arg looks like a username (not a command)\n      const nextArg = args[index + 1];\n      // If next arg matches username format, consume it\n      if (/^[a-zA-Z0-9_-]+$/.test(nextArg) && nextArg.length <= 32) {\n        options.userName = nextArg;\n        return 2;\n      }\n    }\n    return 1;\n  }\n\n  // --isolated-user=<value>\n  if (arg.startsWith('--isolated-user=')) {\n    options.user = true;\n    options.userName = arg.split('=')[1];\n    return 1;\n  }\n\n  // --keep-user - keep isolated user after command completes\n  if (arg === '--keep-user') {\n    options.keepUser = true;\n    return 1;\n  }\n\n  // --keep-alive or -k\n  if (arg === '--keep-alive' || arg === '-k') {\n    options.keepAlive = true;\n    return 1;\n  }\n\n  // --auto-remove-docker-container\n  if (arg === '--auto-remove-docker-container') {\n    options.autoRemoveDockerContainer = true;\n    return 1;\n  }\n\n  // --shell <shell>\n  if (arg === '--shell') {\n    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n      options.shell = args[index + 1].toLowerCase();\n      return 2;\n    } else {\n      throw new Error(\n        `Option ${arg} requires a shell argument (auto, bash, zsh, sh)`\n      );\n    }\n  }\n\n  // --shell=<value>\n  if (arg.startsWith('--shell=')) {\n    options.shell = arg.split('=')[1].toLowerCase();\n    return 1;\n  }\n\n  // --use-command-stream\n  if (arg === '--use-command-stream') {\n    options.useCommandStream = true;\n    return 1;\n  }\n\n  // --session-id or --session-name (alias) <uuid>\n  if (arg === '--session-id' || arg === '--session-name') {\n    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n      options.sessionId = args[index + 1];\n      return 2;\n    } else {\n      throw new Error(`Option ${arg} requires a UUID argument`);\n    }\n  }\n\n  // --session-id=<value> or --session-name=<value>\n  if (arg.startsWith('--session-id=') || arg.startsWith('--session-name=')) {\n    options.sessionId = arg.split('=')[1];\n    return 1;\n  }\n\n  // --status <uuid>\n  if (arg === '--status') {\n    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n      options.status = args[index + 1];\n      return 2;\n    } else {\n      throw new Error(`Option ${arg} requires a UUID argument`);\n    }\n  }\n\n  // --status=<value>\n  if (arg.startsWith('--status=')) {\n    options.status = arg.split('=')[1];\n    return 1;\n  }\n\n  // --output-format <format>\n  if (arg === '--output-format') {\n    if (index + 1 < args.length && !args[index + 1].startsWith('-')) {\n      options.outputFormat = args[index + 1].toLowerCase();\n      return 2;\n    } else {\n      throw new Error(`Option ${arg} requires a format argument`);\n    }\n  }\n\n  // --output-format=<value>\n  if (arg.startsWith('--output-format=')) {\n    options.outputFormat = arg.split('=')[1].toLowerCase();\n    return 1;\n  }\n\n  // --cleanup\n  if (arg === '--cleanup') {\n    options.cleanup = true;\n    return 1;\n  }\n\n  // --cleanup-dry-run\n  if (arg === '--cleanup-dry-run') {\n    options.cleanup = true;\n    options.cleanupDryRun = true;\n    return 1;\n  }\n\n  // Not a recognized wrapper option\n  return 0;\n}\n\n/**\n * Validate parsed options\n * @param {object} options - 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Username should contain only letters, numbers, hyphens, and underscores.`\n        );\n      }\n      if (options.userName.length > 32) {\n        throw new Error(\n          `Username too long for --isolated-user: \"${options.userName}\". Maximum length is 32 characters.`\n        );\n      }\n    }\n  }\n\n  // Keep-user validation\n  if (options.keepUser && !options.user) {\n    throw new Error('--keep-user option is only valid with --isolated-user');\n  }\n\n  // Validate output format\n  if (options.outputFormat !== null && options.outputFormat !== undefined) {\n    if (!VALID_OUTPUT_FORMATS.includes(options.outputFormat)) {\n      throw new Error(\n        `Invalid output format: \"${options.outputFormat}\". Valid options are: ${VALID_OUTPUT_FORMATS.join(', ')}`\n      );\n    }\n  }\n\n  // Output format is only valid with --status\n  if (options.outputFormat && !options.status) {\n    throw new Error('--output-format option is only valid with --status');\n  }\n\n  // Validate shell option\n  if (options.shell !== null && options.shell !== undefined) {\n    if (!VALID_SHELLS.includes(options.shell)) {\n      throw new Error(\n        `Invalid shell: \"${options.shell}\". Valid options are: ${VALID_SHELLS.join(', ')}`\n      );\n    }\n  }\n\n  // Validate session ID is a valid UUID if provided\n  if (options.sessionId !== null && options.sessionId !== undefined) {\n    if (!isValidUUID(options.sessionId)) {\n      throw new Error(\n        `Invalid session ID: \"${options.sessionId}\". Session ID must be a valid UUID v4.`\n      );\n    }\n  }\n}\n\n/**\n * Generate a unique session name\n * @param {string} [prefix='start'] - Prefix for the session name\n * @returns {string} Generated session name\n */\nfunction generateSessionName(prefix = 'start') {\n  const timestamp = Date.now();\n  const random = Math.random().toString(36).substring(2, 8);\n  return `${prefix}-${timestamp}-${random}`;\n}\n\n/**\n * Check if any isolation options are present\n * @param {object} options - Parsed wrapper options\n * @returns {boolean} True if isolation is requested\n */\nfunction hasIsolation(options) {\n  return options.isolated !== null;\n}\n\n/**\n * Get the effective mode for isolation\n * Multiplexers default to attached, docker defaults to attached\n * @param {object} options - Parsed wrapper options\n * @returns {'attached'|'detached'} The effective mode\n */\nfunction getEffectiveMode(options) {\n  if (options.detached) {\n    return 'detached';\n  }\n  // Default to attached for all backends\n  return 'attached';\n}\n\n/**\n * Check if isolation stack has multiple levels\n * @param {object} options - Parsed wrapper options\n * @returns {boolean} True if multiple isolation levels\n */\nfunction hasStackedIsolation(options) {\n  return options.isolatedStack && options.isolatedStack.length > 1;\n}\n\nmodule.exports = {\n  parseArgs,\n  validateOptions,\n  generateSessionName,\n  hasIsolation,\n  hasStackedIsolation,\n  getEffectiveMode,\n  isValidUUID,\n  generateUUID,\n  VALID_BACKENDS,\n  VALID_OUTPUT_FORMATS,\n  VALID_SHELLS,\n  MAX_ISOLATION_DEPTH,\n};\n",
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        "content": "     1→#!/usr/bin/env bun\n     2→/**\n     3→ * Experiment to test screen's tee fallback functionality\n     4→ * This simulates the behavior on macOS with older screen (< 4.5.1)\n     5→ * which doesn't support -Logfile option\n     6→ *\n     7→ * Issue #25: We don't get `Hello` output from `$ --isolated screen --verbose -- echo \"hello\"` command\n     8→ */\n     9→\n    10→const { execSync, spawnSync, spawn } = require('child_process');\n    11→const fs = require('fs');\n    12→const path = require('path');\n    13→const os = require('os');\n    14→\n    15→async function sleep(ms) {\n    16→  return new Promise((resolve) => setTimeout(resolve, ms));\n    17→}\n    18→\n    19→async function testTeeFallback() {\n    20→  console.log('=== Testing Screen Tee Fallback (macOS 4.0.3 simulation) ===\\n');\n    21→\n    22→  // Test environment info\n    23→  console.log('Environment:');\n    24→  console.log(`  Platform: ${process.platform}`);\n    25→  console.log(`  Node: ${process.version}`);\n    26→  try {\n    27→    const screenVersion = execSync('screen --version', {\n    28→      encoding: 'utf8',\n    29→    }).trim();\n    30→    console.log(`  Screen: ${screenVersion}`);\n    31→  } catch (e) {\n    32→    console.log(`  Screen: Not available - ${e.message}`);\n    33→    return;\n    34→  }\n    35→  console.log(\n    36→    `  TTY: stdin=${process.stdin.isTTY}, stdout=${process.stdout.isTTY}`\n    37→  );\n    38→  console.log('');\n    39→\n    40→  // Test 1: The tee fallback approach (current implementation for macOS)\n    41→  console.log('Test 1: Tee fallback approach (current implementation)');\n    42→  const sessionName1 = `tee-test-${Date.now()}`;\n    43→  const logFile1 = path.join(os.tmpdir(), `screen-tee-${sessionName1}.log`);\n    44→  const command = 'echo \"hello\"';\n    45→\n    46→  try {\n    47→    // This is the current implementation for older screen versions\n    48→    const effectiveCommand = `(${command}) 2>&1 | tee \"${logFile1}\"`;\n    49→    const shell = '/bin/sh';\n    50→    const shellArg = '-c';\n    51→    const screenArgs = [\n    52→      '-dmS',\n    53→      sessionName1,\n    54→      shell,\n    55→      shellArg,\n    56→      effectiveCommand,\n    57→    ];\n    58→\n    59→    console.log(`  Command: screen ${screenArgs.join(' ')}`);\n    60→    console.log(`  Effective command inside screen: ${effectiveCommand}`);\n    61→\n    62→    execSync(`screen ${screenArgs.map((a) => `\"${a}\"`).join(' ')}`, {\n    63→      stdio: 'inherit',\n    64→    });\n    65→\n    66→    // Wait for completion and poll for session\n    67→    let waited = 0;\n    68→    const maxWait = 5000;\n    69→    const interval = 100;\n    70→\n    71→    while (waited < maxWait) {\n    72→      await sleep(interval);\n    73→      waited += interval;\n    74→\n    75→      try {\n    76→        const sessions = execSync('screen -ls', {\n    77→          encoding: 'utf8',\n    78→          stdio: ['pipe', 'pipe', 'pipe'],\n    79→        });\n    80→        if (!sessions.includes(sessionName1)) {\n    81→          console.log(`  Session ended after ${waited}ms`);\n    82→          break;\n    83→        }\n    84→      } catch {\n    85→        // screen -ls returns non-zero if no sessions\n    86→        console.log(`  Session ended after ${waited}ms (no sessions)`);\n    87→        break;\n    88→      }\n    89→    }\n    90→\n    91→    // Check log file\n    92→    if (fs.existsSync(logFile1)) {\n    93→      const content = fs.readFileSync(logFile1, 'utf8');\n    94→      console.log(`  Log file exists: YES`);\n    95→      console.log(`  Log file size: ${content.length} bytes`);\n    96→      console.log(`  Log content: \"${content.trim()}\"`);\n    97→      console.log(\n    98→        `  Contains expected output: ${content.includes('hello') ? 'YES ✓' : 'NO ✗'}`\n    99→      );\n   100→      fs.unlinkSync(logFile1);\n   101→    } else {\n   102→      console.log(`  Log file exists: NO ✗`);\n   103→      console.log(`  Expected path: ${logFile1}`);\n   104→    }\n   105→\n   106→    // Cleanup\n   107→    try {\n   108→      execSync(`screen -S ${sessionName1} -X quit 2>/dev/null`);\n   109→    } catch {}\n   110→  } catch (e) {\n   111→    console.log(`  Error: ${e.message}`);\n   112→  }\n   113→  console.log('');\n   114→\n   115→  // Test 2: Test the attached mode WITHOUT TTY (hasTTY() returns false)\n   116→  console.log(\n   117→    'Test 2: Simulating attached mode without TTY (current code path)'\n   118→  );\n   119→  const sessionName2 = `tee-notty-${Date.now()}`;\n   120→  const logFile2 = path.join(os.tmpdir(), `screen-tee-${sessionName2}.log`);\n   121→\n   122→  try {\n   123→    // Simulate the runScreenWithLogCapture function behavior for older screen\n   124→    const command2 = 'echo \"hello from attached mode\"';\n   125→    const effectiveCommand2 = `(${command2}) 2>&1 | tee \"${logFile2}\"`;\n   126→    const shell = '/bin/sh';\n   127→    const shellArg = '-c';\n   128→    const screenArgs = [\n   129→      '-dmS',\n   130→      sessionName2,\n   131→      shell,\n   132→      shellArg,\n   133→      effectiveCommand2,\n   134→    ];\n   135→\n   136→    console.log(`  Screen args: ${screenArgs.join(' ')}`);\n   137→\n   138→    execSync(`screen ${screenArgs.map((a) => `\"${a}\"`).join(' ')}`, {\n   139→      stdio: 'inherit',\n   140→    });\n   141→\n   142→    // Poll for session completion (as done in current implementation)\n   143→    const checkInterval = 100;\n   144→    const maxWait = 5000;\n   145→    let waited = 0;\n   146→\n   147→    const checkCompletion = async () => {\n   148→      while (waited < maxWait) {\n   149→        await sleep(checkInterval);\n   150→        waited += checkInterval;\n   151→\n   152→        try {\n   153→          const sessions = execSync('screen -ls', {\n   154→            encoding: 'utf8',\n   155→            stdio: ['pipe', 'pipe', 'pipe'],\n   156→          });\n   157→          if (!sessions.includes(sessionName2)) {\n   158→            break;\n   159→          }\n   160→        } catch {\n   161→          break;\n   162→        }\n   163→      }\n   164→    };\n   165→\n   166→    await checkCompletion();\n   167→    console.log(`  Session ended after ${waited}ms`);\n   168→\n   169→    // Read output\n   170→    if (fs.existsSync(logFile2)) {\n   171→      const content = fs.readFileSync(logFile2, 'utf8');\n   172→      console.log(`  Log file exists: YES`);\n   173→      console.log(`  Log content: \"${content.trim()}
No results found