What problem does it solve? Development sessions often surface failures, retries, and workflow gaps that get forgotten instead of being converted into lasting improvements. This Skill turns those concrete events into a small set of evidence-backed lessons and proposes focused updates to repository guidance such as AGENTS.md, CONTRIBUTING.md, or docs. ## Core Features & Use Cases - Evidence-Based Lesson Extraction: Records each lesson with the event, demonstrated cause, recommended change, and impact category, while skipping unsupported opinions and one-off circumstances. - Guidance Placement: Maps each lesson to the right destination, whether repository-wide rules, a specific skill entry, docs procedures, or a code fix with a regression test. - Scoped Delivery: Returns findings and proposed edits by default, applies documentation changes only when requested, and redacts credentials and private details from evidence. - Use Case: After a long debugging session where a stale build script caused repeated test failures, run a retrospective to capture the root cause and propose a corrected build procedure in docs plus a regression test suggestion. ## Quick Start Ask the assistant to run a retrospective on the completed development session and propose improvements to the repository guidance.