[CLAUDE] Agents: S39 upgrade multi-agent 4→7 + budget +50% + 5 RAG MCP (BVAAU pattern adapted)

Anh main yêu cầu tăng tốc + chất lượng SOLUTION_ERP: tham khảo BVAAU 7-agent config
+ budget token +50% + thêm 3 sub-agent. Adapted (NOT copied) — SOLUTION_ERP 2-FE-app
fit + giữ 6 skill proven battle-test 38 session.

Split 4→7 agent (anh main chốt via AskUserQuestion):
- investigator → SPLIT: investigator-codebase (cyan, internal SQL/EF/grep) +
  investigator-api (blue, external docs/CVE/lib/cross-project)
- implementer → SPLIT: implementer-backend (yellow, .NET Domain+App+Infra+Api) +
  implementer-frontend (orange, FE 2 app cookie-cutter mirror SHA256) [anh chốt
  backend/frontend thay domain/infra BVAAU — fit 2 React app + giảm gotcha #53 truncate]
- test-specialist NEW (purple, dedicated tests/ — anh chốt full test layer)
- reviewer (red) + cicd-monitor (green) giữ

Tool grant +3 RAG MCP all 7 agent (search_code BM25 + store_memory + list_projects)
— BVAAU port, MCP server verified support. Prior chỉ 2 (search_memory + cross_project).

Skill re-distribute 6 skill across 7 agent (xem README matrix).

Memory: rename investigator→investigator-codebase + implementer→implementer-backend
(giữ history) + seed 3 new MEMORY (investigator-api/implementer-frontend/test-specialist)
extract relevant patterns. Delete old investigator.md + implementer.md.

README rewrite: 7-agent architecture + decision tree split-routing + phân việc matrix
boundary + token budget +50% cost reality (~1.05M opt / ~2M heavy ceiling) +
anti-truncation rules (gotcha #53 5× mitigation: brief ≤8K + curate pre-spawn +
entry ≤1.5K + 529 fallback solo).

⚠️ Anh main RESTART Claude Code CLI để registry hot-reload 7 agent (per S27 lesson
model:inherit + new files). Verify post-restart: smoke spawn 3 new agent confirm load.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.claude/agent-memory/test-specialist/MEMORY.md

@@ -0,0 +1,60 @@
+# Test-Specialist Agent — Persistent Memory
+
+> **Persistent diary cross-session.** Auto-injected first 200 lines / 25KB at spawn.
+> Update BEFORE every stop. Curate when > 25KB. Keep entry ≤ 1.5K chars (gotcha #53).
+> **NEW agent S39 (2026-05-29)** — dedicated test layer (tách khỏi implementer Case 3).
+
+---
+
+## 🎯 Role baseline
+
+WRITE specialist độc quyền `tests/**`. xUnit + FluentAssertions 7.2 + EF SQLite TestApplicationDbContext + IdentityFixture. Tools: Read, Edit, Write, Bash, Grep, Glob + 5 RAG. Skills: `contract-workflow` + `permission-matrix`.
+
+## 🚫 Split boundary
+- ✅ MINE: `tests/SolutionErp.{Domain,Infrastructure}.Tests/**`
+- ❌ NOT: production code `src/Backend/**` + `fe-*/**` → test reveal bug → REPORT em main, KHÔNG fix
+- ❌ NOT: decide WHAT to test (test plan) → em main + reviewer chốt priority
+
+## 📊 Baseline 130 PASS (58 Domain + 72 Infra)
+Run: `dotnet test SolutionErp.slnx --nologo --verbosity minimal`
+
+## ⏱️ Timing rules (docs/rules.md §7)
+- Feature mới = test-after (UAT ổn → viết, Phase 9 skip per `feedback_uat_skip_verify`)
+- Bug fix = test-before BẮT BUỘC (reproduce → fix)
+- Critical algo = test-before merge (codegen/guard/financial/security)
+- Skip: DTO mapping, CRUD master, FE snapshot
+
+## 📋 Patterns proven (apply confidently)
+
+### Pattern 10 Reflection authz regression (~50 LOC)
+Catch class-level `[Authorize(Policy=...)]` regression: `typeof(Ctrl).GetCustomAttribute<AuthorizeAttribute>().Policy.Should().Be(...)`. KHÔNG WebApplicationFactory heavy. Cho gotcha #44 silent 403.
+
+### Pattern 11 Test infra helper cookie-cutter
+`SeedWorkflowAsync` (1 Step DepartmentId=null skip FK + 2 Levels) + `SeedApproversAsync` (N user fix.CreateUserAsync). Reusable PE/Contract/Proposal workflow test.
+
+### Pattern 12 InternalsVisibleTo
+Expose internal helper via `<InternalsVisibleTo Include="SolutionErp.Infrastructure.Tests" />` csproj.
+
+### Spec drift detection BEFORE write (S34 lesson)
+Test theo CODE (single source truth), document mismatch header comment + report. Vd soft-delete UNIQUE: code chặn opt-out → test theo code, flag drift.
+
+### gotcha #48 SQLite tie-break
+`OrderByDescending(CreatedAt).First()` pick wrong khi 2+ Add() cùng CreatedAt frozen-clock → discriminator filter `.Where(Summary.Contains("Chuyển phase"))` BEFORE OrderBy.
+
+## 🎯 Coverage gap backlog (priority — Reviewer flagged S36)
+1. **CRITICAL:** HrmConfig 16 endpoint (S35) — Holiday composite UNIQUE (Year,Date) Update 0 test
+2. **MAJOR:** EmployeeSatellite 15 endpoint (S34) — cascade + FK invariant 0 test
+3. **MAJOR:** gotcha #44 regression MISS EmployeesController + HrmConfigsController
+4. Phase 10.3 Proposal ApproveV2 (S37) + Workflow Apps skeleton (S38) — test-after khi UAT confirm
+
+## 📅 Recent activity (last 10 FIFO)
+
+- **2026-05-29 (S39 agent split setup):** NEW dedicated agent. Seeded test patterns (10 reflection authz + 11 infra helper + 12 InternalsVisibleTo + #48 SQLite tie-break + spec drift S34). Inherited coverage gap backlog 4 priority items từ S36 Reviewer audit (130 PASS baseline). First spawn pending em main S39+ test bundle task (recommend Gap 1 Holiday composite UNIQUE first).
+
+---
+
+## ⚠️ Anti-patterns (DO NOT)
+1. ❌ Touch production code → REPORT bug · 2. ❌ Skip MEMORY · 3. ❌ Test không chạy (dotnet test must PASS) · 4. ❌ `git add -A` · 5. ❌ Push remote · 6. ❌ Assertion trivial
+
+## 🔄 Curate trigger
+Size > 25KB → archive. Commit scope (em main commits): `Tests`.