chore(memory): journal + TODO + contract w2a — feat model-router wave 2-A

.claude/tasks/TODO.md

@@ -17,8 +17,10 @@ migration of shifters/pins/model-gate in wave 2 after proof; names model-router
 - [ ] W1-C accepted-by-design (security 2026-10-09, MEDIUM, not coded around): (1) the model itself can raise the main loop to fable for the rest of a turn through the `route` tool (plan/reflect/escalate/judge) or a background dispatch (derived orchestrate = best tier) — bounded by the turn and `upgradeMaxTokens`, no sticky route is model-callable; (2) `ultrathink` and the default keyword rules now mean "best tier" (fable) at the phase's effort, so an incidental keyword in a pasted composer prompt costs a fable turn (origin composer only). Residuals: `PostModelSwitch` `auto` covers "other programmatic change" (a healthy model could be marked 15 min); strikes never decay inside a session; a `[1m]` variant's `model_not_found` marks the base model until reload; a `models` alias added by the override without a `fallback` key stays unranked (`withEveryAlias` not applied to the default chain) so `leaveDown` skips the upgrade gates for it; `canonical` prefix match has no segment boundary (`claude-sonnet-5-50` would map to sonnet); classifier deferred to W2
 - [x] W1-C live verification part 1 (2026-10-09 after `/reload-plugins`, skills-dir copy loaded, 12 hooks): derived orchestrate on a real background Explore (main high → medium while it ran → high after its end); Explore on sonnet/medium; `route plan` → next request xhigh (engine record); `Skill(effort-low)` bridged → next request low (engine record); `/route show` resolves all 10 phases to full ids, `down: none`; steps arrive as bare `claude-fable-5-1` (no `[1m]`) so the suffix carry never fires on this session
 - [ ] W1-C live verification part 2 (needs a real incident): StopFailure vs turn.complete order; `PostModelSwitch` `auto` semantics and its `from_model` after a router upgrade; whether a router rewrite raises `auto`; `[1m]` carry validity on opus (only on a session whose steps carry it)
-- [ ] W2 migration (after wave 1 proven in daily use): 15 skills `Skill(effort-*)` → `route` tool calls; remove `skills/effort-*`, `lib/effort-pins.txt/.sh`, install/update steps, `effort:` frontmatter on skills and agents; repo agents into the mod's `agents` table (verify the spawn/first-step ordering first); `lib/model-gate.md` + `lib/model-check.sh` → mod rule; census tests repointed; `lib/effort-shift.md` rewritten; docs
-- [ ] W2 migration: 15 skills off `Skill(effort-*)`, remove shifters + effort-pins + model-gate, census repointed, docs
+- [x] W2-A mod (2026-10-09, bb56f3e on feature/model-router-w2, contract `2026-10-09-model-router-w2a-1546`, plan r4 `2026-10-09-model-router-w2-1546`): user decisions — effort-* skills deleted (W2-B), pins REWORKED not deleted (rows = phases by role; frontmatter `model:`/`effort:` kept as census-locked off-state floor after a robustness BLOCKER), orchestrators declare phases, slim model gate. Phases `write` work/high + `apply` work/low; 56 skill rows, 21 agent rows; agents' model at spawn within tier, upward only, project-defined agents skipped (agent.offer); typed slash → name-bound marker (composer|sdk|bridge) + pending slot + idle fallback; best-tier rows in a `runMain` slot surviving turn end; unrowed skill leaves the route; route answer always names the id; `null` override rows. 3 lenses + 2 confirmations (1 BLOCKER each round closed), feater + 4 gap rounds, GATE 0 MET, verifier 3× ECARTS on coverage clauses only → user accepted at the cap, security PASS (2 MEDIUM pre-existing: first-load kill switch fails open, ReDoS size-bounded). Kit 58 → 88 tests. Doc-sync skipped for A (mod-only, docs at B).
+- [ ] W2 gate A→B (user): `/reload-plugins`, then the live probe of plan § Gate (4 points: typed `/status` marker vs fallback in the verbose log; a real rowed spawn line + `step 0 agent` effort = spawn/first-step ordering; sonnet session typed `/feat` self-check + route answer; probe 1 again with a background agent alive). `typed-marker` never seen → W2-B blocked, A4 re-planned.
+- [ ] W2-B repo migration (plan § W2-B B0-B7 + STEP 6/7): bridge removal, `lib/effort-shift.md` rewrite, 15 citers → `route`, `effort=` on opus general-purpose dispatches, slim `lib/model-gate.md`, delete `model-check.sh` + `effort-pins.*` + their tests + install/update blocks, delete `skills/effort-*`, analyzer `effort: xhigh`, census rewrite (drift lock rows ↔ frontmatter), docs + registries (BDR-115 amendment, LRN typed-slash/run slot, EVAL)
+- [ ] W2-A residuals (security, accepted): first-load failure of the override activates the router despite `enabled:false` (fix = treat a failed first load as off); ReDoS on a self-authored prompt pattern (size-bounded); error text in the local log; model alias keys unvalidated (PHASE_KEY would do); `offers` map uncapped; `__proto__`/`constructor` override keys untested. Known limits: `skillCalls`/`spawning` counters are global; offers keyed by name only; builtin `/effort` is not a lever inside a run.
 - [ ] W3 optional: step heuristics, haiku classifier, quota-aware downgrade, A/B
 
 ## 2026-09-30 — Higgsfield pack: CLI + skills in the install process, off by default (feature/higgsfield-pack)