Retrospective

Extract the non-obvious lessons from this session and persist them where they will prevent the same friction next time — with user approval.

Announce at start: "Running retrospective to review this session for improvements."

When to Use

• User says /retro, /retrospective, or "let's wrap up."
• End of a long session with corrections, friction, or workarounds.
• Not needed for short sessions with no friction.

Step 1: Scan the Conversation for Signals

• Corrections (strongest signal) — "no, not that", "don't do X", "stop doing Y".
• Friction — repeated attempts, workarounds, confusion.
• New patterns — approaches that worked and the user validated.
• Outdated docs — instructions contradicted by what actually happened.
• Missing context — information you needed but didn't have.

Step 2: Categorize and Filter

Categorization test: "Would this help someone on a completely different project?" → Yes = Skill, not memory/rule.

STOP guard: before writing a memory/rule for a reusable technique, check whether it belongs as a Skill instead.

Two-pass rule — only persist if: an explicit correction, it appeared in 2+ sessions, the user asked to remember it, or it fills a clear documentation gap. One-off corrections rarely warrant persistence.

Step 3: Verify Before Presenting

Anti-hallucination guard — the #1 failure mode. Agents fabricate "already saved" claims.

• If you claim a file was created/updated, verify it exists (read it / list it) before claiming so.
• If you cannot verify, do NOT claim it was persisted.
• "I wrote X to Y" with no tool verification = hallucination.

Step 4: Present Summary and Get Approval

### Project-Instruction Updates
- [file] — what changed and why

### New Rules
- [rule name] — what it enforces

### Suggested Skills
- [skill name] — what it teaches (cross-project patterns only)

### Pruning
- [file] — what's outdated and should be removed

Wait for user approval before applying.

Step 5: Apply Changes

• Surgical edits to project instructions (append sections; don't rewrite).
• Write new rule files to the rules dir.
• For new skills, follow your skill-authoring process.
• Update memory files with structured content.

Common Mistakes

• Persisting everything — keep only non-obvious lessons that prevent future friction.
• Rewriting instead of appending — changes to project instructions should be surgical.
• Filing cross-project patterns as memories instead of Skills.
• Claiming findings are saved without tool verification.
• Dropping the structured format under time pressure.
• Ignoring the two-pass rule — one-off corrections rarely warrant persistence.

Pairs with: business facts you learn belong in bardak:less-is-more's .claude/business-context.md; durable decisions belong in a bardak:adr.