Audit and clean up source-code comments in any language. Use when asked to audit comments, clean up comments, remove LLM comment smell, fix comment rot, or do a comment cleanup. Removes stale cross-references (Jira/GitHub/RFC/phase refs), temporal/LLM-authorship tells ("for now", "in a real implementation", "previously"), and WHAT-not-WHY narration; keeps WHY/HOW comments.
