chore(memory): LRN-073/074 + EVAL-010 — prune-memory chantier close

- LRN-073 — a skill's worked-example must use FICTIONAL ids, never live registry
  ids (they prime real-data behavior). The RED-7 root-cause lesson.
- LRN-074 — system grep/awk may be ugrep/mawk: don't assume flag-parsing, use
  /usr/bin/grep, watch the RED go red. 4th command-assumption miss this session →
  engraved as a recurring pattern-family (alongside fail-silent LRN-066/071).
- EVAL-010 — prune-memory hardening: RED-7 deterministic fix + RED-8 accept +
  34-row backfill; anomalies incl the real-time false-green catch and the near-
  collision with the existing EVAL-009 (caught by reading first).
- journal 2026-06-29 (cont. 3) + TODO chantier section; BLK-011 finish/push marked.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01C6bUdvHnajCNzgVQefZowj

.claude/memory/evals.md

@@ -30,6 +30,7 @@ rules:
 | EVAL-007 | 2026-06-26 | Coupled-capitalize machinery — TDD 13 + e2e, surgical scope proven | keep |
 | EVAL-008 | 2026-06-27 | Doc-sync coupled machinery — 28/28 real-exec, swap-sweep caught prior debt | keep |
 | EVAL-009 | 2026-06-27 | deploy skill subagent-driven build: multi-stage review + pressure-test net-positive | keep |
+| EVAL-010 | 2026-06-29 | prune-memory hardening: RED-7 deterministic fix + RED-8 accept + 34-row index backfill | keep |
 
 ---
 
@@ -113,3 +114,9 @@ rules:
 - **method**: per-task review (sonnet; opus on the keystone) + writing-skills pressure-test (fresh agent on a `PENDING.json`+moved-HEAD fixture) + final whole-branch review (opus).
 - **anomalies**: (1) the PLAN's code carried 3 latent bugs — missing `git add` for new files, SC2086 unquoted `$viol`, comment-before-shebang SC1128 — all caught by the implementer's TDD+shellcheck gate → plan-code is a DRAFT, the test gate is load-bearing. (2) the final whole-branch review caught 2 Important seam-bugs INVISIBLE to per-task reviews: target-repo `.claude/`-ignored silent no-op ([[LRN-066]]) + `NEXT.sh`-absence non-regeneration → holistic review earns its keep. (3) pressure-test confirmed the cold-resume discipline holds under temptation (the agent excluded the moved-HEAD `0034`). (4) a reviewer subagent bugged out once (user killed it) → re-dispatched clean (transient, not a finding).
 - **action**: keep. Multi-stage adversarial review + a behavioral pressure-test caught classes of bug single-pass review misses — worth the cost on a keystone skill.
+
+## EVAL-010 — prune-memory hardening (RED-7 fix + RED-8 accept + 34-row index backfill)
+- **Date**: 2026-06-29
+- **method**: read-first cartography (sub-agent, confirmed) → RED-7 closed by a DETERMINISTIC test ([[LRN-046]]) + STEP-2 example fictionalized → RED-8 re-reviewed, consciously accepted ([[LRN-047]]) → 34 missing Index rows composed + inserted in ID-sorted slots → STEP-4 verify zero MISSING/ORPHAN; deterministic suite all-green, shellcheck clean.
+- **anomalies**: (1) RED-7 test FALSE-GREEN caught in real time — ugrep parsed `-9..` as an option → empty → green; fixed via /usr/bin/grep ([[LRN-074]]). The RED was WATCHED, not assumed. (2) RED-7 premise verified: LRN-014/016 ARE complementary → the old example modeled a WRONG merge, not just primed it. (3) backfill: 4/5 title-derived Applies-to (the awk-missed entries) missed a real future-app nuance on re-read → corrected before insert (without the 5-check, 4 Index rows would have diverged from source, engraved forever). (4) almost wrote a colliding EVAL-009 (deploy) — read the file first → EVAL-010. (5) pre-existing LRN-021 Index row out of ID-order → moved.
+- **action**: keep. RED-7 GREEN (deterministic), RED-8 documented-accept, drift 34→0. [[LRN-073]] + [[LRN-074]] engraved — 2 pattern-families this session (fail-silent [[LRN-066]]/[[LRN-071]] + command-assumption [[LRN-074]]).