# Multi-agent SOLUTION_ERP — Master Coordination Guide (11-agent)

> **Architecture:** 11 sub-agents **two-tier model (Harness-4 2026-06-10)** + em main **Fable 5 (1M) Max** coordinator — **9 product/quality** (7 core + frontend-designer pink S47 + database-agent read-advisory S52) + **2 monitor INFORM-only** (`tooling-auditor` H1 + `harvest-curator` H2, 2026-06-07 Harness 1). Tier: **4 promote `model: inherit` = Fable 5 1M** (reviewer H4.3a · investigator-codebase H4.3b · database-agent H4.3b · harvest-curator H4.3c) · **7 demote pin `claude-opus-4-8`** (2 implementer · test-specialist · cicd-monitor · investigator-api · frontend-designer · tooling-auditor) · effort **Max cả 2 tier** (env machine-wide).
> **Upgrade S52 (2026-06-08 — AI_INFRA broadcast `2026-06-08-Agent-database-codebase-agents`):** **+database-agent (read-advisory DB specialist, floor DB1–DB11)** — schema/query/migration-design-review/perf/concurrency (DB11 RowVersion vá lost-update S43). Tailor READ-tier (implementer-backend vẫn author) · color OMIT (8 standard hết) · `store_memory` strip. `codebase-agent` = **SKIP n-a** (investigator-codebase đã cover grep/audit + `csharp-lsp` Windows no-op). ✅ **verified-runtime** — spawned OK S53 (first real spawn, caught Mig 46 committed-but-unapplied-local drift) + S56 2× (pre-golive-verify schema-stream + golive-harden design+review). DB11 lost-update fix landed S56 (atomic ExecuteUpdate + Serializable tx, gotcha #58).
> Pattern: Anthropic Building Effective Agents orchestrator-workers + Cognition "writes single-threaded" hybrid + post-deploy automated watchdog.
> **Upgrade S39 (2026-05-29):** 4→7 agent (split investigator + implementer, +test-specialist) + budget +50% + 5 RAG MCP per agent. Reference BVAAU 7-agent config (adapted, NOT copied — SOLUTION_ERP 2-FE-app fit + 6 skill proven battle-test 38 session). Prior: S20t12 initial 3 + S21t1 +cicd-monitor.
> **Upgrade S47 (2026-06-02):** **+frontend-designer (8th sub, pink)** — FD1–FD10 visual-verification design floor (forked AI_INFRA canonical, broadcast `Agent-frontend-designer-floor`). + **`store_memory` STRIPPED khỏi MỌI sub → lead = sole RAG-writer** (broadcast `Memory-store-memory-strip-global`); sub ghi finding → MEMORY.md (file). adap-reports: `docs/governance/adap-reports/`.
> **Upgrade 2026-06-07 (Harness 1·2·3 adopt — AI_INFRA broadcast):** **+2 monitor sub INFORM-only** `tooling-auditor` (H1 tooling/docs-freshness 4-mặt) + `harvest-curator` (H2 harvest-integrity 5-trục) → roster 8→10, **TÁCH BIỆT** per anh-mandate (H1≠H2 "hay quên+nhầm"). + **wave-folder memory-isolation** (Harness 2 — `hmw.js` wave-mode + `.claude/workflows/wave-*/` gitignored, B1–B6). + **email channel** `broadcasts/` (Harness 3 — cross-project comms, self-id=`se`). KHÔNG copy-paste AI_INFRA — tailor SE roster/stack.
> **Upgrade 2026-06-10 (Harness-4 two-tier model — AI_INFRA broadcast `harness-4-model-tier-promotion` + `model-fable-5-max`):** lead = **Fable 5 (1M) Max** (user-level machine-wide, SE không project-pin) · sub two-tier theo tiêu chí H4.3 (a gate≥writer · b verdict-nuôi-quyết-định · c chống-rubber-stamp · d 1M-thật): **promote 4 giữ `inherit`** (reviewer·investigator-codebase·database-agent·harvest-curator) + **demote 7 pin `claude-opus-4-8`** (full-id no-suffix — gotcha #37 cấm `[1m]`; runtime resolve `[1m]` 1M trên máy chung per AI_INFRA s20). `hmw.js` tier-map H4.5 (role-less → `'opus'` · per-task `tier:'fable'|'opus'` override). Email-back AI_INFRA H4.7 BẮT BUỘC. Justification per-vị-trí: adap-report `2026-06-10-Governance-harness-4-model-tier-promotion.md`.
> **Upgrade S63 (2026-06-15 — Harness-5 + 6 adopt):** **H5 model-fallback** — ⚠️ Fable 5/Mythos 5 **suspended 2026-06-12 no-ETA** → lead SE tạm **Opus 4.8 (1M) Max** (promote `inherit` tự theo → two-tier collapse single-tier Opus; demote-pin giữ; **revert-FREE** khi Fable về: đổi lead lại + spawn-test). KHÔNG sửa frontmatter · external-outage blameless KHÔNG RCA · session-start BƯỚC 0.6 check. **H6 governed-ultracode** — mode-ON: substantive task TỰ chạy HMW (KHÔNG đợi keyword "workflow"); workflow-agent default = **inherit lead** (`hmw.js` role-less `'opus'`→inherit) · role-fidelity (agentType ∈ VALID_ROLES) + memory-fidelity (memoryDelta→đúng agent-memory single-writer) ĐÃ sẵn từ HMW-engine. adap-report `2026-06-13-Governance-harness-5-...` + `2026-06-15-Agent-harness-6-...`.
> **Upgrade S64 (2026-06-15 — Harness-7 writing-quality adopt):** sàn chất lượng viết **hướng ra ngoài** (email · broadcast · adap-report · tài-liệu-sister · **câu trả lời lead cho anh**) phải tiếng Việt rõ nghĩa, câu hoàn chỉnh, đủ dấu câu, đúng ngữ pháp (O1); nội bộ giữ lối nén §6.4/§6.5 (O2 — bất đối xứng); reviewer +**Category 6** writing-quality (O3, verified-pending-restart). Rule canonical `docs/rules.md §1.1`. adap-report `2026-06-15-Governance-harness-7-writing-quality.md`. body-hash `a4580ea9…` verified-MATCH (lesson gotcha #61: verify body-hash PHẢI đọc UTF-8 tường minh, PS5.1 default mis-decode tiếng Việt → false-mismatch).

---

## 🎯 Architecture (11 agent)

> ⓘ **Diagram dưới = 7 core lane (pre-S47 snapshot).** Roster THẬT = **11 sub**: 7 core (diagram) + 🩷 frontend-designer (S47) + 🔵 database-agent (S52) + 🟫 tooling-auditor H1 + ⬜ harvest-curator H2 (2026-06-07 Harness 1) — xem skill matrix + decision tree + tool grant dưới. (Cosmetic ASCII chưa vẽ lại — tooling-auditor H1 sẽ flag drift này @session-start.)

```
┌──────────────────────────────────────────────────────────────┐
│ EM (Main) — Fable 5 (1M) Max                                  │
│ • Reasoning + write code (single-threaded principle)          │
│ • Schema/UX/architecture decision + cross-stack tight coupling│
│ • Coordinate 11 sub-agents via spawn + SendMessage            │
│ • Synthesize cross-agent findings + commit/push (em main only)│
│ • Fallback solo nếu spawn fail (gotcha #53 truncate / 529)    │
└──────────────────────────────────────────────────────────────┘
        ↓ spawn + keep-alive (two-tier H4: 4 promote inherit Fable 5 · 7 demote pin Opus 4.8 — Max cả 2)
  ── RESEARCH (READ) ──────────  ── IMPLEMENT (WRITE) ────────────  ── QUALITY ──────────
  ┌──────────────────┐ ┌───────┐ ┌─────────────────┐ ┌──────────┐ ┌────────┐ ┌─────────┐ ┌────────┐
  │investigator-     │ │invest-│ │implementer-     │ │implement-│ │test-   │ │reviewer │ │cicd-   │
  │codebase          │ │igator-│ │backend          │ │er-       │ │special-│ │         │ │monitor │
  │                  │ │api    │ │                 │ │frontend  │ │ist     │ │         │ │        │
  │ INTERNAL audit   │ │EXTERN-│ │ .NET Domain+App │ │ FE 2 app │ │ tests/ │ │adversa- │ │post-   │
  │ SQL/EF/grep/     │ │AL docs│ │ +Infra+Api      │ │cookie-   │ │dedica- │ │rial pre-│ │deploy  │
  │ reference mirror │ │CVE/lib│ │ entity/CQRS/Mig │ │cutter    │ │ted     │ │commit + │ │Gitea + │
  │                  │ │/cross-│ │ /Controller     │ │mirror    │ │xUnit   │ │live curl│ │bundle  │
  │                  │ │project│ │                 │ │SHA256    │ │        │ │         │ │+ smoke │
  └──────────────────┘ └───────┘ └─────────────────┘ └──────────┘ └────────┘ └─────────┘ └────────┘
       cyan              blue       yellow              orange       purple      red         green
```

---

## 🚨 RULE BẮT BUỘC (S39 updated)

**Em main BẮT BUỘC phân việc cho sub-agent đúng vai trò khi ACCEPT criteria match. Budget +50% → lean toward delegate + parallel, ít em main solo fallback.**

**Workflow forward S39+:**
- Trước mọi task → classify qua decision tree dưới
- Read-only research → **split**: internal codebase audit → `investigator-codebase` · external docs/CVE/lib → `investigator-api` (có thể spawn parallel cả 2)
- WRITE scaffold → **split**: .NET backend → `implementer-backend` · FE 2 app → `implementer-frontend` (parallel khi independent — vd BE entity + FE types cùng lúc)
- Test → **`test-specialist`** dedicated (KHÔNG để implementer kiêm)
- Deploy claim → `cicd-monitor` sau push (skip docs-only gotcha #41)
- Heavy diff / security / wire BE claim → `reviewer` pre-commit

**Em main solo CHỈ khi:** schema/UX/architecture decision · cross-stack tight coupling · bug fix reasoning chain · gotcha #53 fallback (spawn truncate/529 → em main solo reliable, proven S37 BE 700 LOC + FE 4 file).

**Anti-truncation rules (gotcha #53 — 5× occurrence S35-S37):**
- Brief WRITE agent ≤ 8K (heavy spec ~10K → truncate risk). FE tight brief proven 0 truncation S36.
- Tiered Memory v1: L1 HOT soft-cap ~30KB + L2 archive on-demand + L3 RAG just-in-time (per AI_INFRA policy). Investigator 32KB S37 truncate = lesson; soft-cap ~30KB tránh tái diễn.
- Agent keep entry ≤ 1.5K chars (frontmatter rule mỗi agent).
- Em main grep verify manual nếu agent return truncated mid-task.
- 529 Overload transient → em main solo fallback (KHÔNG retry loop).

---

## 🔄 Invocation decision tree (em main apply)

```
├── Read-only INTERNAL audit (codebase/SQL/EF diff/grep > 5 files)?
│     → investigator-codebase (cyan)
│
├── Read-only EXTERNAL (official docs / NuGet-npm CVE / lib eval / cross-project ref)?
│     → investigator-api (blue)
│     → Cả 2 investigator parallel OK khi task cần both (vd "audit current + research best practice")
│
├── DB schema-design / migration design-review / perf audit (N+1·index·projection) / transaction-concurrency (RowVersion lost-update)?
│     → database-agent (read-advisory, floor DB1–DB11) — DESIGN/REVIEW/PERF/CONCURRENCY-advise; implementer-backend AUTHOR sau
│     ⟂ vs investigator-codebase: deep DB-layer (introspection/query-plan/concurrency) vs broad codebase grep/audit
│     ⓘ Schema-design quyết-định-cuối vẫn em main solo; database-agent = deep-DB lens hỗ trợ + review implementer output
│
├── WRITE .NET backend (entity/EF Config/Mig/CQRS/Controller/DbInit)?
│     ✓ Spec deterministic · pattern proven >1× · >30min · ≤2 layer
│     → implementer-backend (yellow) [Case 1/2/3/5]
│
├── WRITE FE 2 app (page/types/component cookie-cutter mirror)?
│     ✓ UX flow chốt by em main · spec deterministic
│     → implementer-frontend (orange) [Case 1/2]
│     → BE + FE parallel khi independent (em main chốt DTO shape first)
│
├── WRITE FE DESIGN/REDESIGN (đẹp thật / UX mới / greenfield visual — KHÔNG mechanical mirror)?
│     ✓ design-system-first + visual-verification loop (Playwright screenshot ≥2 viewport → rubric → fix)
│     → frontend-designer (pink) [FD1–FD10 floor]
│     ⟂ vs implementer-frontend: đẹp/UX/thiết kế → frontend-designer · cookie-cutter SHA256 mirror theo spec → implementer-frontend (KHÔNG double-touch 1 file UI)
│
├── WRITE test (xUnit Domain policy / Infra handler / authz regression)?
│     → test-specialist (purple) [test-before bug/critical, test-after feature UAT]
│
├── After push code commit (NOT docs-only)?
│     → cicd-monitor (green) — Gitea poll + bundle hash + Mig prod + smoke
│
├── Adversarial pre-commit / heavy diff / wire BE claim / security?
│     → reviewer (red) — Smart Friend 5-category + live curl
│
├── @session-start/@session-end TOOLING-FRESHNESS audit (skill·sub-role·plugin·docs 4-mặt + drift)?
│     → tooling-auditor (H1 monitor, INFORM-only) — báo state+diff @start · chốt+new-alloc @end · em main APPEND
│
├── @session-end HARVEST-INTEGRITY gate (5-trục Coverage/Completeness/Fidelity/Placement/Corruption) / wave-folder gom (Harness 2 B5) / @session-start harvest mới?
│     → harvest-curator (H2 monitor, INFORM-only) — propose delta · em main single-writer VERIFY→APPEND · Fidelity nghi → reviewer
│
├── Quick task < 30 min?  → Em solo direct
│
└── Schema/UX/architecture/cross-stack tight/bug reasoning chain?
      → Em solo (Cognition) + investigator pre-flight optional + reviewer pre-commit
```

---

## 📋 Phân việc matrix — split boundary (CRITICAL)

| Layer / File | Owner |
|---|---|
| `src/Backend/SolutionErp.{Domain,Application,Infrastructure,Api}/**` | **implementer-backend** |
| `fe-admin/src/**` + `fe-user/src/**` (cookie-cutter mirror scaffold theo spec) | **implementer-frontend** |
| FE **design/UX/redesign** (aesthetic · new visual · design-system · a11y polish) | **frontend-designer** (self-gate rubric FD4 trước reviewer) |
| `tests/**` | **test-specialist** |
| Mig design / FK strategy / discriminator / schema | **em main solo** (database-agent deep-DB design-review/concurrency-advise optional + implementer-backend scaffold sau khi chốt) |
| DB schema introspection / query-perf (N+1·index) / migration design-review / concurrency RowVersion | **database-agent** (read-advisory — DESIGN/REVIEW/ADVISE, KHÔNG author file) |
| UX flow (drawer/tab/modal) / page structure | **em main solo** (implementer-frontend scaffold sau khi chốt) |
| Internal SQL/EF/grep audit | **investigator-codebase** |
| External docs/CVE/lib/cross-project | **investigator-api** |
| Pre-commit verify | **reviewer** (NEVER write) |
| Post-deploy verify | **cicd-monitor** (NEVER write) |

**Boundary dứt khoát:** implementer-backend KHÔNG touch FE · implementer-frontend KHÔNG touch BE (chỉ Read DTO shape) · cả 2 implementer KHÔNG viết test (→ test-specialist) · test-specialist reveal prod bug → REPORT em main KHÔNG fix · **frontend-designer = design/UX/đẹp (FE-only, KHÔNG BE/DB) ⟂ implementer-frontend = mechanical mirror theo spec — KHÔNG double-touch cùng 1 file UI (chồng lấn → escalate em main).**

---

## 🛠️ Skill assignment (6 skill, re-distributed S39)

| Agent | Skills |
|---|---|
| investigator-codebase | `contract-workflow` + `permission-matrix` + `ef-core-migration` |
| investigator-api | `dependency-audit-erp` |
| implementer-backend | `ef-core-migration` + `permission-matrix` + `contract-workflow` + `form-engine` |
| implementer-frontend | `permission-matrix` |
| test-specialist | `contract-workflow` + `permission-matrix` |
| reviewer | `dependency-audit-erp` + `contract-workflow` + `permission-matrix` |
| cicd-monitor | `iis-deploy-runbook` + `dependency-audit-erp` + `ef-core-migration` |
| frontend-designer | `frontend-design` + `senior-frontend` + `brand-guidelines` + `theme-factory` + `webapp-testing` (FD2 loop) + `web-artifacts-builder` |
| database-agent (read-advisory S52) | `sql-database-assistant` (SQL Server first-class — KHÔNG cover EF-Core) + `ef-core-migration` (EF Core 10 pin + 3-file rule) |
| tooling-auditor (monitor H1) | ref-only — reads skill registry, KHÔNG dùng domain skill |
| harvest-curator (monitor H2) | none — deterministic 5-trục scan + Fidelity-escalate `reviewer` |

## 🔧 Tool grant (S39 — +3 RAG MCP per agent)

All 11 agent có **4 RAG-READ MCP**: `search_memory` + `search_code` (BM25, prefer over Read full file — tiết kiệm token) + `cross_project_search` + `list_projects`. Base tools per role (READ: Read/Grep/Glob/Bash [+WebFetch/Search cho api] · WRITE: +Edit/Write/Skill).

> **2 monitor sub (tooling-auditor H1 + harvest-curator H2 — 2026-06-07):** read-only toolset = `[Read, Grep, Glob, Bash, +4 RAG-read]`, **NO `store_memory`, NO Write/Edit** (mirror investigator read-set). INFORM-only — propose → em main single-writer VERIFY→APPEND (B3). 🔴 **G-015 accuracy:** đây KHÔNG = "read-only enforced" — sub vẫn giữ `Bash` (write-channel mở qua shell/curl). Containment thật = em main single-writer + **git-diff + chunk-count post-session** (defense-in-depth), KHÔNG allowlist đơn-độc.

> ⚠️ **`store_memory` GỠ khỏi MỌI sub (2026-06-02 — AI_INFRA broadcast `Memory-store-memory-strip-global`, adap-report cùng id).** → **lead (em main) = sole RAG-writer** (mechanized failure-safe: sub vật-lý không gọi được `store_memory`). Sub tìm thấy finding/pattern mới → ghi **MEMORY.md** (file); lead + re-index đưa vào RAG. *Accuracy (G-015): đây KHÔNG = sub "read-only" — sub vẫn giữ `Bash` (+ vai write giữ `Write/Edit`); containment thật = defense-in-depth git-diff + Qdrant chunk-count, chưa phải allowlist đơn độc.*

---

## 🔌 External skill/plugin mapping (H3 — Harness 1 adopt 2026-06-07)

> Floor H3: nạp đúng skill/plugin hợp stack, **gộp-vai KHÔNG phình roster**. Audit (investigator-api 2026-06-07; tooling-auditor H1 re-count S53): **18** plugin registered (15 enabled / 3 disabled) user-global (`~/.claude/settings.json` — +csharp-lsp +typescript-lsp +session-report vs S49's 15) + ~23 standalone skill (`~/.claude/skills/`). **0 agent mới** — mọi cái = skill→gộp-vai-hiện-có. Nấc: enabled/available → **assigned** (bảng dưới = doc) → used (per-session auto-trigger). tooling-auditor (H1) rà new-alloc mỗi session-end.

| Skill/plugin (nguồn) | Value-locus | Map → vai | Ghi chú |
|---|---|---|---|
| `sql-database-assistant` (standalone) | skill-only | investigator-codebase + implementer-backend | SQL/EF query; đọc kèm `ef-core-migration` (KHÔNG override pin EF Core 10 / dbo single-schema) |
| `frontend-design` (standalone, KHÔNG enable plugin trùng) | skill-only | frontend-designer | duplicate plugin↔standalone → chọn standalone |
| `skill-creator` | skill-only | mọi sub (khi tạo skill project) | additive |
| `claude-md-management` (`claude-md-improver`) | skill+cmd | em main | doc-maintenance |
| `pr-review-toolkit` (silent-failure-hunter / type-design-analyzer / comment-analyzer / pr-test-analyzer) | agent-bearing | reviewer (tham-chiếu .md như CHECKLIST, KHÔNG enable agent) | giữ roster `reviewer` canonical |
| `session-report` (node `.mjs`, Win-OK Node 20) | skill-only | em main / cicd-monitor | optional — token/spawn-cost observability |

**🔴 KHÔNG enable (tránh phình roster + name-collision — H3.3):**
- `code-modernization` (5 agent: legacy-analyst/security-auditor/test-engineer…) — SE = .NET 10 greenfield, agent-set trùng test-specialist/reviewer/investigator. Chỉ cmd `modernize-assess/map` ad-hoc khi port NamGroup module.
- `code-reviewer` (×3 nguồn: pr-review-toolkit + feature-dev + standalone skill) collide roster `reviewer` → **giữ `reviewer` canonical**, KHÔNG dùng plugin code-reviewer.
- `csharp-lsp` — **Windows no-op** (`csharp-ls` không trên PATH; cần `dotnet tool install --global csharp-ls` trước). Defer (Bash dotnet build + grep symbol đủ).
- `commit-commands/commit-push-pr` — giả định GitHub `gh`; SE = Gitea → partial no-op (chỉ `commit.md` dùng được).

---

## 🚦 HMW-mode — Workflow fan-out governance (S49, broadcast `ultracode-hmw-mem-governance`)

> Áp dụng KHI chạy **Workflow runtime fan-out** (`.claude/workflows/hmw.js`). Vận hành thường (Agent-tool spawn lẻ / parallel-trong-1-message) KHÔNG đổi — decision-tree trên vẫn chuẩn. Toggle: `/ultra-on` · `/ultra-off`.

- **Toggle 2-lệnh = on-ramp DUY NHẤT (T1/T2):** `/ultra-on` tạo marker `.claude/hmw-mode.on` (gitignored) + vào mode · `/ultra-off` xóa. Marker = single-source-of-truth, persist qua session/compact. `/session-start` đọc marker → BÁO ON/OFF (T3).
- **Keyword = QUYỀN, KHÔNG lệnh (T4):** "workflow"/"ultracode" mở quyền hỏi, KHÔNG auto-run. Mode-OFF + "chạy workflow" → TỪ CHỐI + nhắc `/ultra-on`. CẤM native `/effort ultracode`. *(Bài học 515K-token false-trigger.)*
- **Scope (S1):** Workflow fan-out CHỈ repo SOLUTION_ERP — KHÔNG fan-out repo/corpus khác.
- **Checkpoint (S2):** `hmw.js` **throw** nếu `checkpointApproved≠true` (mechanized tripwire anti-accidental). Em main BÁO {số agent·vai·task} @inform → set cờ → fan-out (KHÔNG chờ confirm từng lần; marker-ON=consent). Sub KHÔNG spawn sub (S3).
- **VALID_ROLES (9 — whitelist `hmw.js`):** `investigator-codebase` · `investigator-api` · `implementer-backend` · `implementer-frontend` · `test-specialist` · `reviewer` · `cicd-monitor` · `frontend-designer` · `database-agent` (+S57 — S56 đã dùng 3× qua fail-soft WARN). Role lạ → default subagent + WARN (fail-soft, S4c).
- **Memory governance (M1–M5 + R1):** B1 slice-inject (agent ← slice MEMORY của đúng vai qua `args`) · M2 return-delta-only (`memoryDelta{task,verdict,learned,surprise}`) · B3 lead single-writer VERIFY→APPEND-only (no-overwrite-unverified) · B2 harvest-LIỀN sau mỗi workflow vào `agent-memory/<role>` · M5 `store_memory` strip (đã S47). **Containment = defense-in-depth** (git-diff + Qdrant chunk-count post-P2), KHÔNG allowlist đơn-độc (G-015: sub vẫn giữ Bash/Write — KHÔNG "read-only").

> Floor T/S/M/R đầy đủ → `.claude/commands/ultra-on.md`. adap-report → `docs/governance/adap-reports/2026-06-03-Agent-ultracode-hmw-mem-governance.md`.

---

## 💾 Memory discipline

Each agent `.claude/agent-memory/<name>/MEMORY.md` persistent diary. Spawn auto-inject first 200 lines/25KB. Update BEFORE return (BẮT BUỘC, entry ≤ 1.5K chars). 11 folder: investigator-codebase · investigator-api · implementer-backend · implementer-frontend · test-specialist · reviewer · cicd-monitor · frontend-designer · database-agent · tooling-auditor · harvest-curator.

**Tiered Memory Policy v1** (adopt AI_INFRA bulletin 2026-05-29 — thay ngưỡng cứng ">25KB archive" bằng tiered + just-in-time; size to ≠ chất lượng, context-rot):
- **L1 HOT** = `MEMORY.md` soft-cap **~30KB** (role + patterns + anti-patterns + 5-8 entry gần nhất) → auto-inject mỗi spawn
- **L2 COLD** = `archive/<YYYY-MM>.md` (activity cũ) → Read on-demand
- **L3 SEARCHABLE** = RAG `search_memory` → just-in-time
- Discipline: search L3 / Read L2 TRƯỚC khi deep-dive (đừng nhồi L1). Agent nhớ vô hạn qua L2+L3, context spawn vẫn gọn. Curate khi L1 > ~30KB (KHÔNG còn hard 25KB).

**End-of-session:** em main SendMessage mỗi agent flush MEMORY → đọc 7 update → synthesize cross-agent → integrate project memory/session log → commit/push.

---

## 📊 Cost reality (budget +50% S39)

| Component | Effective tokens billed (after caching) |
|---|---|
| 7 sub-agents spawn setup | ~1.1M (7 × ~155K cache WRITE) |
| SendMessages cached | ~500K |
| Em main session | ~250K |
| **Total per heavy session** | **~1.85M (~9× solo)** |
| **Optimized (compact + cache + skip trivial + parallel)** | **~1.05M (~5× solo)** |

**+50% budget** (vs prior ~700K opt / ~1.35M heavy → now ~1.05M opt / ~2M heavy ceiling). Max 20× plan absorbs ~5× comfortable. Trade-off justify: split nhẹ hơn mỗi spawn (giảm gotcha #53 truncate) + parallel BE+FE+test (giảm wall-clock) + test-specialist clear coverage gap backlog (quality).

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## 🎯 Project tunings (SOLUTION_ERP)

**Stack:** .NET 10 Clean Arch + CQRS MediatR + EF Core 10 + SQL Server + 2 React 19 Vite 8 FE + Gitea CI + Windows IIS.

**State (S38 — 2026-05-28):** 40 mig · 84 tables · ~223 endpoints · 53 FE pages · 130 test PASS · 53 gotchas · 27 memory · 6 skills · **7 sub-agents** · Phase 10 COMPLETE 11/11 Plan G-*.

**Windows MAX_PATH:** project path nested + Dropbox-managed → implementer KHÔNG dùng `isolation: worktree`. Default branch OK.

**UAT live mode (Phase 9):** `feedback_uat_skip_verify` — skip `dotnet test` mỗi chunk, vẫn `npm run build` × 2. test-specialist test-after khi UAT confirm; test-before cho bug/critical algo.

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## 🔗 References
- [Anthropic Building Effective Agents](https://www.anthropic.com/engineering/building-effective-agents)
- [Cognition "Don't Build Multi-Agents"](https://cognition.ai/blog/dont-build-multi-agents)
- BVAAU 7-agent reference: `D:\Dropbox\CONG_VIEC\BENHVIEN_A_AU\SOURCE_CODDE\.claude\agents\` (adapted S39 — split trục + 5 RAG tool; SOLUTION_ERP giữ 6 skill + backend/frontend split thay domain/infra cho 2-FE-app fit)
- Memory: `feedback_per_chunk_commit` · `feedback_uat_skip_verify` · `feedback_audit_reuse_before_clone` · `feedback_implementer_truncation_mitigation` (gotcha #53)

## ⚠️ CLI restart required
Agent definition change (S39 split 4→7) → **anh main restart Claude Code CLI** để registry hot-reload (per S27 lesson — model:inherit + new agent files). Verify post-restart: spawn smoke test mỗi agent mới (investigator-api / implementer-frontend / test-specialist) confirm load OK.