chore(memory): BLK-011 resolved + LRN-072 — fix-by-removal

- BLK-011 → resolved by REMOVAL (not by committing the orphan), with the TRUE
  reason engraved: speculatively auto-bootstrapping an unused multi-session engine
  at project creation is bad on its own terms. The initial "redundant with TODO"
  framing is explicitly marked WRONG (gsd >> roadmap; TODO != gsd ROADMAP) — a
  false reason that won't mislead a future reader. Reasoning trace kept: both
  premises refuted on read, conclusion held for the stronger reason.
- LRN-072 — a stranded-artifact bug can be fixed by NOT creating the artifact
  (negative diff), not by plumbing its commit; before building machinery, ask if
  the PRODUCING step is wanted. Speculative-at-creation -> remove; deliberate-on-
  demand -> keep. Family: BLK-010, BLK-011, BDR-036.
- journal 2026-06-29 (cont. 2) + TODO: BLK-011 line flipped, chantier section,
  MINOR-gate FINISH marked merged. Index rows updated (blockers + learnings).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01C6bUdvHnajCNzgVQefZowj
This commit is contained in:
Bastien Chanot
2026-06-29 18:27:34 +02:00
co-authored by Claude Opus 4.8
parent a131f45f00
commit 52d4a66daa
4 changed files with 28 additions and 6 deletions
+6
View File
@@ -70,6 +70,7 @@ rules:
| LRN-069 | 2026-06-29 | token-authed remote writes under CC perms: inline-env (never `export`), token in header not argv, keep `git push` on ASK as the gate | scripting git/curl writes to a private remote from tool calls |
| LRN-070 | 2026-06-29 | clean-tree-gated migration blocked by a dirty submodule → diagnose pointer-vs-content; for a local edit use `submodule.<name>.ignore=dirty`, never blind reset | migrating/releasing a superproject whose submodule carries intentional local edits |
| LRN-071 | 2026-06-29 | fail-loud must cover the helper's OWN commit, not just its inputs — 3rd occurrence of the swallowed-commit pattern (a failed op masked by a later returning-0 statement) | any helper whose return value gates a downstream "success" — audit every fallible internal op propagates, esp. the commit |
| LRN-072 | 2026-06-29 | a stranded-artifact bug can be fixed by NOT creating the artifact (negative diff), not by plumbing its commit — if the producing step is speculative/unused, delete it | a stranded/duplicated/uncommitted-artifact bug — before building machinery, ask if the PRODUCING step is wanted; speculative-at-creation → remove, deliberate-on-demand → keep |
---
@@ -801,3 +802,8 @@ rules:
- **RECURRENT (3×) — audit systematically, not an isolated bug**: same fail-silent-where-it-must-fail-loud class in the surgical-commit family — [[LRN-066]] (`deploy-commit.sh`: porcelain hides a git-ignored path → silent no-op; fix = loud rc 5) + [[LRN-068]]/[[BLK-012]] (`gitflow_init`: socle-commit failure swallowed by `||` then `git branch` returned 0 → init continued past the dead commit) + this. The common mechanism: a fallible op (esp. a commit) whose failure isn't propagated, MASKED by a later returning-0 statement. The motif RETURNS; treat it as a known smell.
- **fix**: guard the commit — `if ! git commit …; then LOUD + return 5; fi`. rc 5 = "tried, git refused" (distinct from rc 3 = "could not start"). Empty stdout (no stale hash), loud stderr. Proven by T8: RED showed the masking (rc 0 + stale hash + false "committed"), GREEN rc 5 + empty + REJECTED, 32/32.
- **future application**: any helper whose RETURN VALUE gates a downstream "success" — audit that EVERY fallible internal op propagates its failure, ESPECIALLY the load-bearing commit. `set -uo pipefail` without `-e` does NOT abort mid-function; an unchecked failing command followed by a returning-0 line exits 0 and lies. Check `cmd || other` forms, no-`-e` blocks, every "report success after the op" line. Test the partial-failure path (commit-blocked repo) → must fail loud, empty, non-zero.
## LRN-072 — a stranded-artifact bug can be fixed by NOT creating the artifact (negative diff), not by plumbing its commit
- **pattern**: 3rd member of the post-FINISH-artifact class (memory, docs, GSD ROADMAP) — but UNLIKE the first two (real artifacts ALWAYS produced → couple a commit), the GSD artifact came from a SPECULATIVE, opt-in, rarely-used producer (init-project auto-bootstrapping a multi-session engine at project creation). The reflex fix (reorder + build `gsd-commit.sh` + tests) would have added machinery to faithfully commit an artifact nobody uses. The right fix was a NEGATIVE diff: delete the producer → orphan never created → bug dissolves, zero new code (BLK-011).
- **the refutation that got there**: the framing "ROADMAP redundant with TODO" was WRONG (gsd ≫ roadmap = state machine/crash-recovery/cost/parallel/worktree; TODO ≠ gsd ROADMAP = different altitude + consumer). Reading REFUTED both premises, yet the CONCLUSION (remove the step) held for a STRONGER reason: speculatively scaffolding a heavy engine the sole user doesn't use, at creation, is bad per se. Right answer, reason corrected before engraving — change the QUESTION before changing the code.
- **future application**: a stranded / duplicated / uncommitted-artifact bug → BEFORE building machinery to handle the artifact, ask whether the step that PRODUCES it is actually used / wanted / non-speculative. Speculative or unused (esp. a personal/single-user repo) → DELETE the producer; the cleanest fix is the absent one. Distinguish speculative-at-creation (REMOVE) from deliberate-on-demand (KEEP). Family: [[BLK-010]], [[BLK-011]], [[BDR-036]].