Cs Feat Accept

This is the final gate in a three-stage feature workflow. It runs after implementation is done and forces you to verify the code matches the design doc section by section, update architecture docs with what actually shipped, backfill or promote requirement docs from draft to current, and mark roadmap items complete if this feature came from one. The output is a nine-section acceptance report covering interface contracts, behavior checks, test scenarios, and a reverse audit of mount points to ensure the feature can be cleanly removed later. It won't let you skip steps or write "known deviation, will fix later" in the report. You'd trigger this when saying "feature is done, run acceptance" or "ready to merge."