When a reviewer leaves a comment on a specific line or passage, that anchor point refers to a particular version of the file. As the author continues working — pushing new commits, rebasing, or amending — the underlying content shifts. Without re-anchoring, comments become misleading: they point to wrong lines or silently disappear. This design introduces a three-layer pipeline that keeps comments positioned correctly as branches evolve, and gives each comment a precise state describing how confident the system is in its current placement.

The pipeline works by combining two complementary techniques that no existing tool does together. Layer 1 applies git's own diff math: given the commit the comment was created against and the current HEAD, it builds a LineAdjustmentMap that translates line numbers through the diff hunks deterministically. Layer 2 verifies that the translated position still contains the expected text. If it does not, Layer 3 searches the file usi