Retrospection

Retrospection

A retro that produces prose produced nothing. The output unit is a DIFF.

Procedure (also encoded in commands/retro.md)

1. Gather signal, cheapest first:

   • harness corrections list for this session (gold)
   • prediction misses (harness stats, this session's ids)
   • strike-2/3 events from stuck-detection
   • anything the user re-explained twice (you made them pay twice) Then backfill skill VALUE tags for skills that visibly fired this session: harness skill-fired <name> --outcome helped|neutral|hurt — evidence-based only (the skill changed/failed to change the outcome; unsure ⇒ don't tag). Fire counts alone can't catch a high-fire/low-value skill; /meta-retro prunes on hurt>helped, so untagged noise directly corrupts pruning. (provenance: roadmap item 9, session 975732da, 2026-07-05)

2. Select <= 3. The highest-signal events only. A retro that proposes ten changes is noise wearing a process costume; three reviewed diffs beat ten unreviewed ones every time.

3. Spawn the retro-miner agent with the transcript path + correction log. Fresh context matters: it reads what happened, not what you remember happening. Take its top events as candidates; you may veto with a reason.

4. Route each via skill routing-learnings → write the artifact on a branch retro/YYYY-MM-DD-slug in the HARNESS repo (never the project repo, unless the routing verdict was "project fact").

5. Self-lint: python3 lint/lint_harness.py. Fix violations now.

6. Audit: spawn harness-auditor on the diff. It checks for the four sins: weakening enforcement, duplicating an existing artifact, missing provenance, unfalsifiable claims. Address verdicts before proposing.

7. Propose: git push the branch and gh pr create with the provenance template (commands/harness-pr.md). Auto-merge only if autonomy.json says this category has graduated — check, don't assume.

8. Mark done — TWO records (resolve $HARNESS per /retro step 1):

   • ephemeral Stop-gate flag (silences this session's nudge; deleted at session end): touch "$HARNESS/state/retro_gate_<session_id>" — use the ABSOLUTE trunk path; a relative state/... lands in the active worktree's CWD, not the trunk, so the flag (and any backlog tracking) silently misses (forensic finding, session 9856a41f).
   • durable completion ledger (persists; /retro-backlog reads it to skip done sessions): "$HARNESS/bin/harness" retro-done add <session_id> --slug <slug>.

What good output looks like

"User corrected import-sorting twice (sessions a1b2, c3d4) → PR adds PostToolUse format hook proposal + user-model entry (evidence: 2)." One sentence of why, one diff, one provenance line. That's a learning.