What problem does it solve? After a bug has been verified and diagnosed with high confidence, someone still needs to write the actual code change, prove it works, and leave the repository in a clean state for review. This Skill automates that final implementation step while enforcing strict scope and safety boundaries. ## Core Features & Use Cases - Convention-compliant fixes: Writes minimal code changes following EmDash conventions (Kysely SQL templates, ApiResult handlers, Lingui strings, forward-only migrations). - Regression test enforcement: Creates a failing vitest test before the fix and confirms it passes afterward, or abandons the attempt with a clear explanation. - Full validation pipeline: Runs the package test suite, typecheck, lint, and formatting, then stages changes without committing. - Use Case: A triage pipeline confirms issue #142 is a real bug in the menus handler with a diagnosed root cause. This Skill writes the fix, adds a regression test, runs all checks, stages the files, and returns a conventional commit message for the orchestrator to commit and open a PR. ## Quick Start Apply the diagnosed fix for issue #142, add a regression test, run tests and typecheck, then stage the changes without committing.