Create a production-quality Hermes skill named openrouter-expert that makes you excellent at building with OpenRouter and the OpenRouter SDKs.

This is not a notes file. It must be an agent-optimized resolver skill: compact, durable, triggerable, and designed to look up the right current docs before making claims or writing code.

Source material to read first:

1. OpenRouter docs index: https://openrouter.ai/docs/llms.txt
2. Full OpenRouter docs when needed for important details: https://openrouter.ai/docs/llms-full.txt
3. Skill creation best practices: https://agentskills.io/skill-creation/best-practices.md
4. Skill description guidance: https://agentskills.io/skill-creation/optimizing-descriptions.md