retro

# Retro — LLM-driven Session Retrospection One LLM pass over a session or the memory backlog detects **friction and reusable learnings**, classifies each into one of seven destinations, and materializes approved ones. **Core principle:** No silent writes — every materialization needs approval. ## Modes - **`/retro`** — Sweep: the whole current session. - **`/retro "<problem>"`** — Spotlight: one described issue. - **`/retro outcome [session-id|--since N]`** — replay a past session by its outcomes. - **`/retro audit [--scope project|repo|skill]`** — cross-session architectural drift. - **`/retro promote`** — re-home already-written local memory upward (never project-local memory); drain the source only after the upward write is verified. See `references/promote-mode.md`. - **`/retro done`** — definition-of-done gate: seven evidence-backed checks (task, findings, retro, cleanup, questions, tickets, time), each ✅ / ❌ / ⏸ / N/A. **⏸ only when a named person can close it with a named action; what is structurally absent is N/A with its reason** — a ⏸ nobody can close makes the whole table get skipped. Say **done** when every row is ✅ or N/A. See `references/done-mode.md`. - **Auto** — optional SessionEnd hook, off by default. It is plugin-level, not part of this skill directory: `hooks/session-end.json` at the repository root (see README, "Optional auto-trigger"). ## Pipeline (all modes) 1. Mechanical pre-pass — `${CLAUDE_SKILL_DIR}/scripts/detect-mechanical.py` (Promote: `${CLAUDE_SKILL_DIR}/scripts/scan-memory-inventory.py`). It requires `--transcript-file`, and the transcript is located **by content** — a token from this session — never by mtime: several sessions share one project slug, so the newest JSONL is regularly somebody else's. Invocation in `references/workflow.md`. Then `uv run ${CLAUDE_SKILL_DIR}/scripts/collect-review-findings.py` on the same transcript (`uv run`, because its header declares the tree-sitter parser; plain `python3` stops with a message): review threads, bot reviews, and comments on the session's PRs/MRs, their linked issues, plus normalized tracker feedback supplied via `--feedback-file` (input for B18–B20, D4, D6). PRs a script opened (a fleet driver's `opened.jsonl`) are not in the transcript: pass that file with `--pr-list`. Resolve relevant opaque hints through the owning integration, never by key shape. See `references/feedback-contract.md`; incomplete coverage is not silence. 2. LLM enrichment — inferential signals, both classes (friction + learnings B16–B20); filter false positives. 3. Cross-session enrichment (optional) — JSONL scan via `${CLAUDE_SKILL_DIR}/scripts/scan-cross-session.py`. 4. Discover skills — `${CLAUDE_SKILL_DIR}/scripts/find-org-skills.py` — and the repo's harness (`project-harness-inspection.md`). 5. Classify (`classification-heuristic.md`) — authority first, then broadest scope; never project-local memory. 6. Evals — read a matched skill's `evals/`; propose a TDD stub. 7. Proposals — prose Why + How-to-apply, grouped, ≤10; learnings survive the trim. 8. Approval — approve / edit / reject per proposal. 9. Materialize per destination; for Promote, drain the source last (verified). 10. Report. ## Boundaries **Scope:** session-end/cross-session analysis, skill-PR routing, done gate. Tracker identity and access belong to the owning integration; QA and time policy belong to project/organization rules. No implicit tracker, CLI discovery or organization-specific billing defaults in the core. **Always:** LLM is primary classifier. Patches go to source repos, never the cache. Per-private-repo confirmation. Conventional Commits. DCO sign-off (`git commit -s`). Preserve commit signing. **Ask first:** skill-match ambiguity, auto-mode activation, private-repo targets, dirty-worktree fallback, any promotion making a note team-visible. **Never:** auto-merge, silent writes, harness-invented attribution (a disclosure the user's rules prescribe is required), skip hooks (`--no-verify`), patch the cache, hardcode a static skill list, `rm` a drained memory (tombstone); from Done mode: merge, tag or deploy, or touch another session's containers, processes or worktrees. ## References | File | Purpose | |---|---| | `references/feedback-contract.md` | Tracker-neutral evidence and reference resolution | | `references/friction-catalog.md` | All signals: friction + learnings (A/B/C, B16–B20) | | `references/destination-taxonomy.md` | The seven destinations | | `references/classification-heuristic.md` | Friction → destination mapping | | `references/skill-discovery.md` | Finding skills at runtime | | `references/patch-workflow.md` | Source-repo patching (never cache) | | `references/eval-integration.md` | Evals for context + TDD stubs | | `references/promote-mode.md` | Promote: materialize-then-drain | | `references/done-mode.md` | Done: seven-gate finish check | | `references/workflow.md` | All modes + phase selection |