chore(memory): BDR-074 BDR-075 EVAL-026 LRN-136 — config-protection removal + plan-challenge phase

.claude/memory/decisions.md

@@ -1046,3 +1046,9 @@ rules:
 - **Why**: /harden had a real scale (SKILL.md:435), /seo had NONE → every axis felt → two runs over identical code diverged, while /client-handover gates on 17/20. H2 sharpened it: once drift reports real change, a self-moving score is visibly noise. Same principle as engine-side cannibalisation grouping — never hand a model 1000 rows to add.
 - **Makes computable (was prose)**: "N/A is not a zero" (R2 on-page, I1 off-page) → axis excluded + weights renormalised, verified all-20 with 2 N/A → global 20.0. Prevalence: affected/sampled shift severity ONE step (≥50% escalate, single de-escalate).
 - **Files**: lib/seo-data/score.py (4818c61).
+
+### BDR-074 — Remove config-protection edit-block guardrail [accepted] (2026-07-17)
+Deleted hooks/config-protection.sh + its settings.json PreToolUse registration + lib/tests/config-protection.test.sh. Hook blocked model Edit/Write on quality-gate files (settings.json, gitflow.sh, .githooks, doctor.sh, hooks, lib/tests, lint) via one-shot .claude/.config-edit-ok sentinel. Removed per user req — friction editing own config > guardrail value; user = human operator. Residual: gitflow pre-commit guard + Gitea branch protection still block direct code commits main/develop; only edit-time block gone. Alts rejected: warn-only (exit0+log), targeted relaxation. Supersedes any prior config-protection decision.
+
+### BDR-075 — Framework-wide 3-way adversarial plan-challenge phase [accepted] (2026-07-17)
+After a plan/reflection elaborated + before execution, 3 fresh blind sub-agents (correctness/robustness/simplicity) attack it; main loop RE-THINKS every aspect a BLOCKER lands (named change or [deferred]) + re-challenges once if plan materially changed. Reusable lib/challenge-plan.md + new agents/plan-challenger.md (read-only, big-model per [[BDR-066]] — audit judgment, NOT sonnet). Fail-safe (never fail open: mute→retry→escalate), severity-driven (any single-lens BLOCKER=must-address, NOT consensus — lenses orthogonal), advisory into existing human gate. KIND tunes lenses: build-plan/proposals/fix-bundle. Wired 11 orchestrators: ship-feature/init-project/feat/bugfix + onboard/audit-delta/code-clean + seo/geo/harden/web-validate. Excluded (no real plan): hotfix/tour/analyze/client-handover/release-candidate/spec. Audit found 0 repo-owned plan-challengers pre-existing (only vendored gstack autoplan, sequential+unwired). See [[EVAL-026]].