# Implementer Agent — Persistent Memory

> **Persistent diary cross-session.** Auto-injected first 200 lines / 25KB at spawn.
> Update BEFORE every stop. Curate when > 25KB.

---

## 🎯 Role baseline

Code execution specialist for SOLUTION_ERP. Conditional WRITE (Case 1+2+3+5 ONLY). Tools: Read, Edit, Write, Bash, Skill, Grep, Glob. Output: commits + verification report.

## 🚨 STRICT scope auto-refuse criteria

REFUSE if ANY:
1. Schema design decisions needed (FK strategy / nullable / discriminator)
2. UX flow decisions needed (drawer vs tab vs modal)
3. Cross-stack > 2 layers tight coupling
4. Bug fix involving reasoning chain
5. Integration testing involving multiple components
6. < 30 min trivial task
7. First time pattern (no prior precedent)
8. Spec ambiguity > 20%

---

## 📋 Patterns proven (cross-session) — apply confidently

### Pattern 1: Per-chunk discipline 5-chunk A-E (Anthropic Case 2 orchestrator-workers)

Memory `feedback_per_chunk_commit` chốt:
- **Chunk A:** Domain entities + Migration (3-file rule)
- **Chunk B:** Application handlers (CQRS Commands + Queries + Validators)
- **Chunk C:** Service layer (workflow logic, business rules)
- **Chunk D:** API controllers + endpoints
- **Chunk E:** FE update (cả 2 app mirror) + Tests + Docs + commit final

Build + test pass mỗi chunk. Commit message format:
```
[CLAUDE] <scope>: Chunk <X> — <one-line summary>
<body>
Verify:
- Build pass (X warning, 0 error)
- N test pass (...)
Pending Chunk <Y+1>: <next>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
```

### Pattern 2: 3-file rule EF migration (BẮT BUỘC commit đủ)

Memory + gotcha #17:
- `Migrations/{TS}_{Name}.cs` (Up + Down)
- `Migrations/{TS}_{Name}.Designer.cs` (snapshot at migration time)
- `Migrations/ApplicationDbContextModelSnapshot.cs` (current snapshot)

```bash
dotnet ef migrations add <Name> \
  --project src/Backend/SolutionErp.Infrastructure \
  --startup-project src/Backend/SolutionErp.Api

# Apply lên DB Dev:
dotnet ef database update --project src/Backend/SolutionErp.Infrastructure \
  --startup-project src/Backend/SolutionErp.Api \
  --connection "Server=(localdb)\MSSQLLocalDB;Database=SolutionErp_Dev;Trusted_Connection=True;TrustServerCertificate=true"

# Apply lên DB Design (catchup nếu thiếu):
dotnet ef database update --project src/Backend/SolutionErp.Infrastructure \
  --startup-project src/Backend/SolutionErp.Api
```

### Pattern 3: Audit reuse trước khi clone (memory `feedback_audit_reuse_before_clone`)

Khi user nói "clone X sang Y":
1. **Grep discriminator field** (`ApplicableType`, `Type`, `Kind` enum)
2. **Check Service / Handler / Controller** có hardcode type cụ thể không
3. **Check FE pages** có route dynamic typeCode hay hardcode
4. **Check menu key** (BE const + FE menuKeys.ts) — thường thiếu chính ở đây
5. Default reuse 80%, chỉ thêm menu key + sample seed (3 file ~60 LOC)

Bài học S17+ Clone B: 1 commit `937eb24`, deploy 1 phát chạy.

### Pattern 4: Service hook vs CRUD endpoint cho derived state (memory `feedback_service_hook_vs_endpoint`)

State X = derived của action Y → UPSERT trong handler Y, KHÔNG endpoint /X riêng.

Bài học S19 Mig 26 PE LevelOpinions: Service `ApproveV2Async` UPSERT row qua match `ApproverUserId == actorUserId` (fallback first khi Admin override). 0 endpoint mới.

### Pattern 5: FE mirror 2 app rule §3.9

Duplicate `fe-admin/` + `fe-user/` CÓ CHỦ ĐÍCH:
- Sửa fe-admin xong → mirror fe-user (tay)
- Khi breaking change rename prop → BẮT BUỘC `npm run build` × 2 app (memory `feedback_uat_skip_verify` exception)

### Pattern 6: VND format helpers + Phone/Email validate (S20 turn 4)

Inline mỗi file FE PE:
```ts
const parseVnd = (s: string): number => Number(s.replace(/[^\d]/g, '')) || 0
const formatVndInput = (n: number): string => (n > 0 ? n.toLocaleString('vi-VN') : '')
const PHONE_RE = /^0\d{9,10}$/
const EMAIL_RE = /^[^\s@]+@[^\s@]+\.[^\s@]+$/
const isValidPhone = (s: string) => !s || PHONE_RE.test(s.replace(/[\s\-.]/g, ''))
const isValidEmail = (s: string) => !s || EMAIL_RE.test(s)
```

### Pattern 7: Per-NV admin opt-in flag (S21 t5 Mig 29 + S22 Mig 30)

ApprovalWorkflowLevel +1 column `bool` DEFAULT 0 (opt-in admin set explicit). EF config `HasDefaultValue(false)`. DTO extend field. FE Designer checkbox inline mỗi Level row.

Reusable cho future flag F5/F6 (vd `AllowEarlyApprove`, `AllowDelegate`): admin per-NV opt-in qua Level table thay vì global flag. Decision tree: flag scope role-context → table mapping natural (Approver → Level table carry ApproverUserId FK, Drafter → User table direct — memory `feedback_per_nv_permission_scope`).

Bài học S22: AllowApproverEditSection1 (Mig 30) follow same pattern Mig 29. 0 schema redesign cần.

### Pattern 8: Tách endpoint riêng cho narrow scope (S22 AdjustBudget vs UpdatePeDraft)

Khi 1 action có 2 scope khác nhau theo role:
- **Drafter scope (rộng):** `UpdatePeDraft` cover Section 1 (Tên/Địa điểm/Mô tả/Payment + Budget) — chỉ phase Nháp / Trả lại
- **Approver scope (hẹp):** `AdjustBudget` chỉ Budget rows — phase Đang duyệt với per-NV flag

KHÔNG default expand Drafter scope cho Approver — tránh accidental edit Section 1. Endpoint tách riêng = guard tự nhiên + audit trail rõ.

Bài học S22: AllowApproverEditSection1 flag opt-in cụ thể PATCH /budget rows, KHÔNG /full-update.

### Pattern 9: Defense-in-depth FE + BE guard pair (S22+1)

UI button `disabled={!canReject}` + BE helper `EnsureCanRejectV2Async(peId, userId)` throw 403 nếu non-approver. Tránh request forge non-approver gọi PATCH direct qua DevTools.

Pattern reusable: bất kỳ action sensitive (approve/reject/adjust) → FE disable + BE guard helper riêng (NOT inline trong handler).

Bài học S22+1: 3 button (Duyệt / Trả lại / Từ chối) — UI disable + BE helper. Tránh leak action qua API direct.

### Pattern 10: Reflection-based regression test cho Authorize policy (S22 Plan C task 4 #44)

5 test lightweight ~50 LOC catch class-level `[Authorize(Policy = "...")]` regression:
```csharp
var attr = typeof(ControllerXxx).GetCustomAttribute<AuthorizeAttribute>();
attr.Policy.Should().Be("CanDoSomething");
```

KHÔNG cần WebApplicationFactory heavy (slow + complex setup). Reflection catch ai accidentally remove `[Authorize]` hoặc đổi policy name.

Pattern reusable cho future controller sensitive (Approve / Reject / Adjust / Reset).

### Pattern 11: Test infra helper cookie-cutter (S22)

Trong `PurchaseEvaluationWorkflowServiceReturnModeTests` + `PurchaseEvaluationDraftGuardTests`:

```csharp
private async Task<Guid> SeedWorkflowAsync(...) {
    // 1 Step (DepartmentId=null skip Dept FK) + 2 Levels
}

private async Task SeedApproversAsync(Guid levelId, ...) {
    // Multi user via fix.CreateUserAsync
}
```

Pattern reusable: test PE workflow → 1 Step + 2 Levels + N approvers per Level. `DepartmentId=null` skip Dept FK ràng buộc. Token cost ~80 LOC repeated cross 2 test class S22.

### Pattern 12: InternalsVisibleTo csproj expose helper cho test (S22)

`PurchaseEvaluationDraftGuard` static helper internal — expose qua `<InternalsVisibleTo Include="SolutionErp.Infrastructure.Tests" />` trong `SolutionErp.Application.csproj` thay vì rewrite public API.

Tránh API surface bloat. Reusable cho future guard / helper internal cần test.

---

## ⚠️ Anti-patterns observed (DO NOT)

1. ❌ Skip MEMORY.md update — knowledge tài sản
2. ❌ Bypass pre-commit hooks `--no-verify` (forbidden absolute)
3. ❌ `git add -A` hoặc `git add .` — specific files only
4. ❌ Touch files outside spec scope — anti-fiddle rule
5. ❌ Push remote autonomously cho heavy change — em main pushes (UAT iteration: confirm với em trước push)
6. ❌ Modify `SolutionErp.slnx` autonomously — em main updates khi thêm `.cs/.csproj`
7. ❌ Lower bar to match em main quality — Smart Friend Cognition anti-pattern
8. ❌ Proceed when spec ambiguous > 20% — return REFUSE với reason

---

## 🧠 SOLUTION_ERP conventions (auto-load via skills)

- **BE .NET 10:** PascalCase tiếng Anh entities + DTO records + command names. CQRS + MediatR + FluentValidation + AutoMapper. Repository qua `IApplicationDbContext`. `GlobalExceptionMiddleware` map exception → ProblemDetails (NO try-catch trong controllers).
- **FE React 19 + Vite 8 + TS 6:** Named export only (trừ App). TanStack Query. shadcn/ui copy-paste. TS6 `erasableSyntaxOnly` cấm `enum` → const-object pattern. UI 100% tiếng Việt. Mirror 2 app rule §3.9.
- **Test:** baseline 104/104 PASS (58 Domain + 46 Infra: 23 baseline + 3 PE WF guard regression S21 t3 gotcha #45 + 20 mới S22 — gồm PE WF ReturnMode + Draft guard + Reflection-based Authorize policy). Phase 9 UAT skip per chunk theo memory `feedback_uat_skip_verify`. Stack xUnit + FluentAssertions 7.2 + EF SQLite 10 `TestApplicationDbContext` override `nvarchar(max) → TEXT`.
- **Build:** `dotnet build SolutionErp.slnx` clean 0 err + `npm run build` × 2 app pass.
- **Commit:** `[CLAUDE] <scope>: <message>` + Co-Authored-By Claude Opus 4.7 (1M context).

## Scopes (pick 1)

`Contract` · `PurchaseEvaluation` · `Budget` · `Form` · `Workflow` · `Supplier` · `Auth` · `Admin` · `Api` · `App` · `Domain` · `Infra` · `FE-Admin` · `FE-User` · `Tests` · `Docs` · `CICD` · `Scripts` · `Skill`

---

## 🔑 Pin versions (package pinning §2.8)

KHÔNG `*` / `latest`. Critical pins:
- MediatR `12.4.1` (14 fail DI)
- Swashbuckle `6.9.0` (10 conflict OpenApi 2)
- Node engines `>= 20` + CI pin `20.x` (bài học NamGroup, memory `feedback_node_cicd`)
- LibreOffice `25.8.6`
- @microsoft/signalr `8.0.7`

---

## 📅 Recent activity (last 10 FIFO)

- **2026-05-14 (S23 t1, K7 Chunk F PASS):** Mig 31 Approver F2 service regression tests. Sub-task 1 fix broken Drafter F2 test reference K1 flagged: `PurchaseEvaluationWorkflowServiceReturnModeTests.cs:253` `drafter.AllowDrafterSkipToFinal = true` (DELETE 3 deprecated Drafter F2 tests entire — `SkipToFinal_DrafterAllowed_SetsPointerToFinalLevel` + `SkipToFinal_DrafterDenied_NonAdmin_Throws` + `SkipToFinal_AdminBypass_Succeeds`, semantic deprecated no value). Sub-task 2 add 3 new Approver F2 tests: `ApproveV2_SkipToFinal_AdminTickFlag_SetsPhaseDaDuyet` (happy path — slot Cấp 1 Bước 1 admin tick → Phase=DaDuyet, pointer cleared, opinion + PEA + Changelog logged), `ApproveV2_SkipToFinal_FlagOff_NonAdmin_ThrowsConflictException` (denied — flag off non-admin slot user → throw "chưa được phép duyệt thẳng Cấp cuối"), `ApproveV2_SkipToFinal_FlagOff_Admin_BypassesFlagCheck` (admin bypass — flag off admin role → DaDuyet allowed). Pattern 11 SeedWorkflowAsync cookie-cutter REUSE — created `SeedApproverF2WorkflowAsync` helper (2 Steps × 2 Levels — multi-step verify skip thẳng terminal KHÔNG fallthrough advance pointer next Step), AllowApproverSkipToFinal per-slot param. PE init Phase=ChoDuyet + CurrentWorkflowStepIndex=0 + CurrentApprovalLevelOrder=1 (vs S22 happy path từ DangSoanThao). Add `using Microsoft.EntityFrameworkCore` cho `.ToListAsync()` PEL/PEA/Changelog query. File header narrative line 17-25 REWRITE để track Mig 31 refactor semantic Approver scope ChoDuyet vs Drafter-from-Nháp cũ. Verify: `dotnet build` clean 0 err 2 warn pre-existing DocxRenderer. `dotnet test SolutionErp.slnx` 104 PASS (58 Domain + 46 Infra, 3 deleted + 3 added cancel out, baseline preserved). 3 Approver F2 tests verified individually PASS. Diff +175/-92 LOC trên 1 file. Token ~14k.
- **2026-05-14 (S23 t1, K5 Chunk D PASS):** Cleanup zombie F2 endpoint + UsersPage column + DTO field + stale narrative comments (Reviewer Major #1 + Major #2 + Minor #3 + Minor #4). Pattern post-refactor full cleanup atomic 1 commit. BE 7 file (UsersController.cs DELETE PATCH /allow-skip-final endpoint + SetAllowDrafterSkipToFinalBody record; UserFeatures.cs DELETE UserDto field + SetUserAllowDrafterSkipToFinalCommand + Handler + sentinel-false mappings cleanup; ApprovalWorkflow.cs REWRITE stale narrative line 78-80 Mig 31 semantic + docstring line 108; PurchaseEvaluationFeatures.cs REWRITE Command DTO comment line 401; ApprovalWorkflowConfiguration.cs APPEND Mig 31 narrative line 22-24 + clean storage move comment line 87; ApprovalWorkflowV2AdminFeatures.cs clean DTO comment line 58; IPurchaseEvaluationWorkflowService.cs + PurchaseEvaluationDtos.cs clean stale "storage Users.AllowDrafterSkipToFinal" references) + FE Admin 2 file (UsersPage.tsx DELETE "Skip cuối" column TableHeader/TableCell + FastForward import + allowSkipMut mutation hook + FastForward toggle button; types/users.ts DELETE allowDrafterSkipToFinal field). fe-user KHÔNG đụng (no UsersPage admin-only + K6 sẽ handle Workspace Drafter checkbox), FE Designer page KHÔNG đụng (K3 done — 2 stale comment line 75 + 504 leftover deferred K6). Grep `AllowDrafterSkipToFinal` + `allow-skip-final` + `allowDrafterSkipToFinal` + `Skip cuối` + `FastForward` ZERO results across src/Backend (excl migrations) + fe-admin/src. Build BE production projects clean (0 err, 2 pre-existing DocxRenderer warn). Build fe-admin clean (0 TS err, 0 new warn). Diff +42/-94 LOC trên 9 file. Token ~12k. K6 Workspace Drafter checkbox cleanup next.
- **2026-05-14 (S23 t1, K3 Chunk C PASS):** FE Admin Designer 7th checkbox AllowApproverSkipToFinal + banner rewrite. Pattern Mig 29/30 admin opt-in per-slot mirror **reinforced 3×** cumulative (Mig 29 F1+F3 5 checkbox + Mig 30 F4 1 checkbox + Mig 31 F2-refactor 1 checkbox = 7 checkbox total per slot). Cookie-cutter 1 file fe-admin only (`ApprovalWorkflowsV2Page.tsx`, fe-user no Designer per Investigator K0 S1). 7 sub-items atomic: (1) LevelDto type +`allowApproverSkipToFinal: boolean`, (2) EditLevelEntry type +same, (3) `makeDefaultLevelEntry` default false, (4) `copyFromDefinition` propagate `?? false`, (5) inline checkbox row position **cuối list** sau F4 AllowApproverEditBudget logical grouping (Edit Section 2 → Edit Budget → Skip to Final), (6) banner rewrite line ~623 từ "F2 cấu hình ở User Management" (Plan D S22 stale) → "Cấu hình quyền duyệt riêng cho từng NV trong slot Approver bên dưới (Trả lại / Edit Section 2 / Edit Budget / Duyệt thẳng Cấp cuối)", (7) POST/PATCH mutation body `levels.map` +allowApproverSkipToFinal. Verify: `npm run build` fe-admin PASS clean 0 TS error, 0 new warning. Bundle 1395.74 KB (unchanged trivial vs baseline). Diff +26/-7 LOC. Token ~6k. K5 next chunk cleanup zombie endpoint + UsersPage column.
- **2026-05-14 (S23 t1, K1 Chunk A PASS):** Mig 31 schema swap F2 storage Users → ApprovalWorkflowLevels. Pattern Mig 29 ADD-DROP no-BACKFILL Option A (accept lose 4 prod user value `fin.pp` + `pm.nv` + `nv.test` + `truong.nguyen`). Cookie-cutter 6 BE file (User.cs -1 prop + ApprovalWorkflow.cs +1 prop `AllowApproverSkipToFinal` per-Approver-slot + ApprovalWorkflowConfiguration.cs +HasDefaultValue + PurchaseEvaluationWorkflowService.cs surgical -37 LOC F2 Drafter SUBMIT branch line 121-157 stub + Mig 3-file). TransitionAsync `bool skipToFinal` 8th param KEPT cho K2 repurpose APPROVE STEP. 4 Application compile-break sites (UserFeatures.cs LIST + GET DTO mapping + SetUserAllowDrafterSkipToFinalCommandHandler NoOp + PurchaseEvaluationFeatures.cs drafter flag = false) patched với sentinel `false` + K2 marker comment (DTO/Command signature unchanged per spec — K2 sẽ refactor). Mig 31 Up() manual reorder ADD-DROP correct (no BACKFILL). Both DBs Dev + Design applied successful. Build production projects clean 0 err 0 warn. Test compile error `PurchaseEvaluationWorkflowServiceReturnModeTests.cs:253` left for K7 chunk (spec exclude test scope). Pattern `feedback_per_nv_permission_scope.md` reinforced 3× cumulative (Mig 29 F1+F3 + Mig 30 F4 + Mig 31 F2-refactor). UserConfiguration.cs file không tồn tại — User entity configured inline `ApplicationDbContext.OnModelCreating` ~line 86, không có HasDefaultValue cho `AllowDrafterSkipToFinal`, EF picks prop change tự động.
- **2026-05-14 (S23 t1, Chunk pre-A PASS):** UI polish slot label Designer Mig 31 prep. File `fe-admin/src/pages/system/ApprovalWorkflowsV2Page.tsx` line 873 replaced `Quyền duyệt NV #{ei + 1}` → `Quyền duyệt {usersList.data?.find(u => u.id === entry.approverUserId)?.fullName ?? 'Chưa chọn NV'}`. Pattern: lookup user fullName từ `usersList` query (Option A — DTO `EditLevelEntry` không có `approverFullName` field, chỉ `LevelDto` BE response có `approverUserName` nhưng edit state dùng `EditLevelEntry`). `usersList` đã in scope ~line 500, pattern lookup `.find(x => x.id === e.approverUserId)` đã dùng tại line 535 cho validation. Cookie-cutter 1 file fe-admin only (fe-user KHÔNG có Designer per Investigator K0 S1). Tailwind classes preserved (`mb-1 text-[10px] font-medium uppercase text-amber-700`). Verify: `npm run build` fe-admin PASS clean 0 TS error, 0 new warning. Bundle 1395 KB (unchanged trivial). Token ~5k.
- **2026-05-13 (S22, REFUSED 100%):** Em main classified ALL S22 work as cross-stack reasoning chain (BE Mig + Service guard + DTO + FE Designer + FE Section + FE types + tests) → REFUSE per criteria #3+#4. Em main solo executed. State chốt S22: **30 migrations** (+1 Mig 30 AllowApproverEditSection1 per-NV F4 flag), **104 test PASS** (+20 từ 84 — gồm PE WF ReturnMode + Draft guard + Reflection-based Authorize policy regression), ~146 endpoints (+3), 46 gotchas unchanged, 33 active prod users (13 cũ + 20 mới S22+2). 7 patterns successfully applied throughout S22 (validated continued effectiveness): Pattern 7 per-NV admin opt-in flag (Mig 30 follow Mig 29), Pattern 2 EF migration 3-file rule, Pattern 8 tách endpoint narrow scope (AdjustBudget vs UpdatePeDraft), Pattern 9 defense-in-depth FE+BE guard pair (S22+1 disable 3 button), Pattern 10 Reflection-based regression test cho Authorize policy (Plan C task 4 #44, 5 test ~50 LOC), Pattern 11 test infra helper cookie-cutter (SeedWorkflowAsync + SeedApproversAsync), Pattern 12 InternalsVisibleTo csproj expose internal helper cho test. Mismatches discovered S22: (1) "Đang trong quá trình duyệt = người điều chỉnh cũng là người duyệt" — em first interpret default Approver scope always allowed → bro corrected per-NV admin opt-in flag (Mig 30). Lesson: clarify default behavior vs admin opt-in TRƯỚC khi default scope expansion. (2) `PE.changelogs` field KHÔNG có trong PeDetailBundle — em first design history display trong BudgetAdjustSection, build FAIL TS2339. Fix: removed history display (defer S23+ via separate fetch endpoint). (3) Dialog `size="xl"` NOT supported — only "sm" | "md" | "lg". Use "lg" cho preview iframe. (4) API auth field `accessToken` không phải `token`. Script `seed-test-users-prod.ps1` lần đầu FAIL 401 sau auth — em fix `$authResp.accessToken`.
- **2026-05-13 (S21 t3-t5, REFUSED 3×):** Em main classified all 3 turns as cross-stack reasoning chain (BE+FE+test tightly coupled) → REFUSE per criteria #3+#4 (cross-stack > 2 layers, bug fix reasoning chain). Bug fix gotcha #45 = bug + reasoning, F1+F2+F3 = schema design decision, Refactor per-NV = drastic refactor schema + Service + FE × 2 app. All correct REFUSE — em main solo executed. Strict scope criteria validated S21 t3-t5 — REFUSE rate 100% match Anthropic warning "tightly interdependent coding". Cumulative: 84 test, 29 mig, 45 gotcha. Pattern saved future invocation: per-NV permission scope split natural theo role + EF migration BACKFILL reorder pattern.
- **2026-05-11 (setup):** Implementer agent initialized. Baseline knowledge load complete (5 patterns proven cumulative S1-S20: per-chunk 5 chunk, 3-file rule Mig, audit-reuse clone, service hook derived state, FE mirror 2 app, VND format helpers). No implementations performed yet. Awaiting first SendMessage from em main. Strict scope auto-refuse criteria active.

---

## 🔄 Curate trigger

- Memory size > 25KB → archive recent entries to `archive/<period>.md`
- Duplicate entries detected → merge
- Stale > 3 months → remove

Last curate: 2026-05-11 (initial seed)
