What problem does it solve? Teams repeatedly rediscover the same bugs, gotchas, and architectural decisions because hard-won knowledge never gets written down. This Skill captures durable project learnings into authoritative instruction files like AGENTS.md or CLAUDE.md so future work benefits from past experience. ## Core Features & Use Cases - Authority Detection: Locates the correct instruction file by following the repository's instruction hierarchy, and identifies overlapping existing rules to amend rather than duplicate. - Verification Gate: Keeps only verified, reusable learnings that prevent recurring bugs, record non-obvious invariants, or preserve architectural rationale; rejects hypotheses until confirming evidence is supplied. - Safety Filtering: Strips credentials, personal data, internal hostnames, and usable security-bypass instructions before anything is written. - Minimal Patching: Produces the smallest possible edit matching the target file's voice, with outcomes limited to no change, a proposed patch, or one applied patch. - Use Case: After debugging a recurring CI failure caused by a misconfigured cache key, ask the agent to record the verified fix as a one-line rule in AGENTS.md so the mistake never recurs. ## Quick Start Ask the agent to preserve the learning from the incident we just fixed as a rule in AGENTS.md.