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chore(memory): BDR-065 amendment (auto-purge coded) + LRN-138 + journal

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BDR-065 delete-side now automated (lib/gitflow.sh _gitflow_purge_transient).
LRN-138: gitignore != delete for run-time artifacts read from disk — use
commit-during-run + auto-delete at the integration boundary. TODO checked,
journal line.
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Bastien Chanot
2026-07-22 15:12:28 +02:00
parent 9b89da29be
commit 78a25aeb5e
4 changed files with 32 additions and 0 deletions
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.claude/memory/learnings.md
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@@ -1349,3 +1349,9 @@ rules:
- **fail-safe pin rule**: keep the HIGHEST tier as the frontmatter pin and override DOWN at call sites — a forgotten override then over-tiers (costs money) instead of silently downgrading judgment (costs correctness).
- **future application**: before splitting any agent across model tiers, try MODE + `model=` first; create a new agent file only for a genuinely new role. Run-scoped `.audit/<name>-<RUNID>` files + completeness sentinel + fail-closed consumer for any cross-dispatch artifact.
- **cousin**: [[LRN-125]] [[LRN-126]] [[BDR-077]].
## LRN-138 — gitignore ≠ delete for run-time artifacts read from disk (2026-07-22)
- **pattern**: gitignore is the WRONG tool for an artifact a pipeline READS FROM DISK during a run — it blocks the commit but leaves the file (cleans nothing) AND breaks git-travel flows (superpowers commits the spec via `git add` so it reaches the SDD worktree; a gitignored path is silently skipped w/o `-f`). Right tool = commit-during-run + AUTO-DELETE at the integration boundary (`gitflow finish`, pre-merge, on the working branch → history keeps the archive, develop tip clean).
- **context**: user asked to gitignore transient planning artifacts (`docs/superpowers/{specs,plans}`, `.claude/tasks/{contracts,plans}`) to stop them merging. BDR-065 had already REJECTED gitignore for docs/superpowers on the git-travel ground; the real gap was the DELETE side never being coded (doctrine-only manual chore, slipped once — 655e364). Built `_gitflow_purge_transient`.
- **future application**: "don't merge transient X" → ask: does the run read X from disk? does X travel via git (worktree, foreign checkout)? Yes → auto-purge at finish, not gitignore. Scoped commit `-- <paths>` avoids sweeping a dirty index; `git diff --quiet HEAD -- paths` precheck makes `git rm` all-or-nothing safe; keep the purge best-effort so cleanup NEVER blocks a merge. Prove archive-reachability with `git log --full-history` / `git show <sha>:path` — plain `git log -- path` prunes the purged add-commit via history simplification (bit me writing T17).
- **link**: [[BDR-065]].