---
name: project-harness4-two-tier-model
description: "Model-tier evolution — H4 two-tier (S57) → H8 all-inherit (S66) → **worker-tier-pin S124**: 14/14 sub = model:opus+effort:max, lead=frontier owner-choice/phiên, Fable qua /fable-real. Restart-needed cho frontmatter (hot-reload ENV-DEPENDENT)."
metadata: 
  node_type: memory
  type: project
  originSessionId: 9ea74cdf-642a-4c4e-9ddc-04a23413a86a
  modified: 2026-07-25T18:39:23.400Z
---

**Model-tier hiện-hành (S124, 2026-07-15 owner-decision) = WORKER-TIER-PIN:**
- **14/14 sub-agent frontmatter = `model: opus` + `effort: max`** (worker-tier gán-cứng, KHÔNG còn inherit). Lý-do owner: CICD hay rớt, cần Opus MAX mới chạy tốt.
- **Lead = frontier-class owner-choice mỗi phiên** {Fable 5 (1M) Max | Opus 4.8 (1M) Max} qua `/model` (BƯỚC 0.6 probe).
- **Fable cho 1 vai** = owner gõ `/fable-real <vai>` (single-top-model) HOẶC `/model` chọn lead=Fable tay.
- ✅ **H23-precedence ĐÃ ĐO 2026-07-16 S126** (phiên đầu sau restart; lead=Fable vô-tình làm control sạch): spawn `tier:'fable'` trên reviewer (pin `opus`) → resolved **`claude-fable-5`** = **SPAWN-PARAM THẮNG hard-pin** ⇒ `/fable-real` SỐNG, không re-pin. Lane no-tier → `claude-opus-4-8` DÙ lead=Fable ⇒ **pin ăn runtime, không inherit-lead**. Chi-tiết → [[h23-spawn-precedence-result]].
- `hmw.js resolveModel`: role-có-frontmatter → undefined → frontmatter opus tự lo (worker-tier) · role-less → inherit lead · per-task `tier:'opus'|'fable'` escape-hatch.

**Lineage (lịch-sử, đã superseded):**
- **H4 two-tier (S57 2026-06-10):** lead Fable · 4 promote-inherit (reviewer/inv-cb/database/harvest) · 7 demote-pin Opus. Adap-report `2026-06-10-...harness-4-model-tier-promotion.md`.
- **H8 all-inherit (S66 2026-06-16):** mọi sub `model: inherit` = ăn top-tier lead. Thay two-tier.
- **S124 worker-tier-pin:** align floor erratum-h8 (all-inherit model-vế superseded → sub=worker-tier gán-cứng). Adap-report `2026-07-15-...erratum-h8-...md`.

**🔴 Runtime-verification lessons (GIỮ — vẫn đúng):**
1. **Restart-CLI cho EDIT frontmatter agent ĐANG TỒN TẠI + command `.md`** — CCD registry cache lúc session-start, KHÔNG fresh-read mỗi spawn (proved 2× 06-10 vs 06-11). ⚠️ **THU HẸP S107:** agent file **MỚI** = hot-reload giữa phiên OK (office-document 12th sub VERIFIED-RUNTIME 0-restart). ⚠️ **ENV-DEPENDENT S110:** hub chạy cùng experiment → NGƯỢC kết quả ⇒ KHÔNG fleet-generalize; nghi ngờ → restart. **S124 change = EDIT-existing 14 file ⇒ CẦN RESTART.**
2. **gotcha #37:** pin full-id `claude-opus-4-8` KHÔNG suffix `[1m]`; alias `opus` trong frontmatter/hmw hợp-lệ.
3. Demote-quality watch: verdict-quality giảm rõ → adap-request. (Nay all-opus nên n/a; watch CICD-monitor sau S124.)

Liên quan: [[feedback-harness-123-adoption]] · [[feedback-high-to-max-multiagent-quality]] · [[feedback-workflow-fanout-reliability]]

**🔄 VALUE-update @S151 (2026-07-25):** idiom "lead = owner-choice per-session {Fable|Opus 4.8}" (MTv3 S110→S124) **THÔI DÙNG** theo thư hub `9c909007` @S149 (re-stamp 07-25 G-024a; pre `59ce1d0f`) — **default MỌI vị trí kể cả lead = Opus 5 MAX**; model cao hơn = anh `/model` đầu phiên hoặc per-invocation `/fable-real` (quyền tuyệt đối, 0 caveat). CẤU TRÚC giữ (worker-tier-pin S124 · outage-reflex H5 · engine-đắt H21). Sweep 8 site idiom @S151 (stale-deep FLAG-4): hmw.js:68 · agents/README ×3 · ultra-on · fable-real · fable-clone · file này.