refactor(skills): execute the audit retire wave — 8 skills retired/merged, 66 -> 58, spine 15 -> 13 (age-skills-audit-fable-l6ic.12)

Executes the age-e3zk decision (fresh disposition pass: docs/audits/
skills-audit-2026-07-06.md; council 2026-07-06 parked this behind age-p2c7,
which landed as d7f950ca8; operator directive 2026-07-07 authorized finishing
all filed work).

RETIRED: red-team (validate --debate absorbs), perf (frontier-generic, zero
repo bindings), flywheel (ao flywheel status CLI is the surface).
MERGED: eval-outcomes -> validate (--mode=pre-impl --target=scenario),
review -> validate (--mode=pr), compile + curate -> post-mortem (mining half;
mechanical surfaces stay ao compile / ao lookup), recover -> status
(--recover mode; deep playbook preserved at status/references/
recovery-playbook.md; delivers l6ic.7 and the l6ic.13 row reconcile).

Mechanics: ao skills retire x8 (trees incl. images/*/skills, terminal ledger
rows via --into, .agy-plugin review bundle removed); absorption tombstones in
docs/SKILLS.md + SKILL-TIERS.md (56 user-facing + 2 internal = 58, counted);
spine gate re-anchored 15 -> 13 (l6ic.11 minimal consistency: review +
red-team leave; membrane 7 + bookkeeper 6); bespoke twins post-mortem/status
hand-mirrored per AGENTS-CODEX; manifest pruned of orphan twin rows (62 -> 57);
overrides catalog pruned of 8 retired rows; gemini verify core_skills +
claude/codex image manifests updated; retired-subject eval
red-team-adversarial-validation.json removed (not canary-listed).

Gates: spine-integrity 13 PASS; wiring-closure PASS; skill-frontmatter 58/58;
codex manifest+artifacts+parity PASS; regen-check ALL GREEN; SKILL-TIERS also
fixed Opus 4.6 -> 4.8, GOALS.yaml -> GOALS.md, flywheel diagram to CLI truth
(l6ic.6 pre-work). Residual prose mentions in non-gated docs are the l6ic.2
debris sweep's scope.

docs/philosophy.md

@@ -31,7 +31,7 @@ Sessions → Bookkeeping → Learnings → Findings → Planning Rules → Gates
 Each phase is deliberate:
 
 - **Sessions** produce signal: commits, decisions, failures, retros.
-- **Bookkeeping** (`/post-mortem`, `/curate --mode=forge`, `ao harvest`) extracts and scores that signal. Scores on specificity, actionability, novelty, and confidence filter noise.
+- **Bookkeeping** (`/post-mortem`, which folded the retired `/curate` mining modes, `ao harvest`) extracts and scores that signal. Scores on specificity, actionability, novelty, and confidence filter noise.
 - **Learnings** are the raw output — scored, attributed, timestamped.
 - **Findings** are promoted learnings: higher confidence, cross-session validation, broader applicability.
 - **Planning rules** are enforcement-level knowledge: if a finding is violated, the pre-mortem blocks the plan.