solution-erp/.claude/agent-memory/implementer-backend/MEMORY.md

Implementer-Backend Agent — Persistent Memory

Persistent diary cross-session. Auto-injected first 200 lines / 25KB at spawn. Update BEFORE every stop. Tiered Memory v1: L1 HOT soft-cap ~30KB · L2 archive/ on-demand · L3 RAG search_memory just-in-time. Keep entry ≤ 1.5K chars (gotcha #53). Full verbatim history pre-S40 → git d2f52ba + archive/2026-05-q1..q4.md. Renamed S39: implementer → implementer-backend (.NET half). FE patterns → implementer-frontend MEMORY. Test patterns → test-specialist MEMORY.

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🎯 Role baseline

WRITE specialist .NET backend SOLUTION_ERP (Domain+Application+Infrastructure+Api). Case 1+2+3+5 only. Tools: Read, Edit, Write, Bash, Skill, Grep, Glob + 5 RAG MCP. Skills: ef-core-migration + permission-matrix + contract-workflow + form-engine. Output: commits + verify report.

🚫 Split boundary (S39) + auto-refuse

• ✅ MINE: src/Backend/SolutionErp.{Domain,Application,Infrastructure,Api}/**
• ❌ NOT: fe-*/** → implementer-frontend · tests/** → test-specialist · schema/UX/architecture decision → em main
• REFUSE if ANY: 1 schema design (FK/nullable/discriminator) · 2 UX flow · 3 cross-stack >2 layer · 4 bug fix reasoning chain · 5 integration multi-component · 6 <30min trivial · 7 first-time no precedent · 8 spec ambiguity >20%

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📋 BE Patterns proven (apply confidently)

Pattern 1: Per-chunk discipline A-E

A Domain+Mig (3-file) · B Application CQRS (Command/Query/Validator) · C Service (workflow logic) · D Api Controller · E commit. Build+test pass mỗi chunk. Commit [CLAUDE] <scope>: Chunk X — ... + Co-Authored-By Claude Opus 4.8 (1M context).

Pattern 2: EF migration 3-file rule (gotcha #17 — BẮT BUỘC commit đủ)

{TS}_{Name}.cs + .Designer.cs + ApplicationDbContextModelSnapshot.cs. Path src/Backend/SolutionErp.Infrastructure/Persistence/Migrations/.

dotnet ef migrations add <Name> --project src/Backend/SolutionErp.Infrastructure --startup-project src/Backend/SolutionErp.Api
# Apply Dev (runtime): --connection "Server=(localdb)\MSSQLLocalDB;Database=SolutionErp_Dev;Trusted_Connection=True;TrustServerCertificate=true"
# Apply Design (ef default): không cần --connection

Apply BOTH DB per feedback_designtime_runtime_db.

Pattern 3: Audit reuse trước khi clone (feedback_audit_reuse_before_clone)

"Clone X→Y": grep discriminator (ApplicableType/Type/Kind) → check Service/Handler hardcode → check FE route dynamic → check menu key (BE const + FE menuKeys.ts thường thiếu) → default reuse 80%, chỉ thêm menu key + sample seed.

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

State X derived của action Y → UPSERT trong handler Y, KHÔNG endpoint /X riêng. VD ApproveV2Async UPSERT LevelOpinion qua match ApproverUserId==actorUserId (fallback first khi Admin override). 0 endpoint mới.

Pattern 7: Per-NV admin opt-in flag (Mig 29/30/31)

ApprovalWorkflowLevel +1 bool DEFAULT 0 (opt-in). EF HasDefaultValue(false). DTO extend. FE Designer checkbox inline. Scope role-context → table mapping (Approver→Level table carry ApproverUserId FK, Drafter→User table direct, feedback_per_nv_permission_scope). Reusable F5/F6.

Pattern 8: Tách endpoint riêng cho narrow scope

1 action 2 scope theo role → tách endpoint (guard tự nhiên + audit). VD Drafter UpdatePeDraft (Section 1 rộng, phase Nháp/Trả lại) vs Approver AdjustBudget (Budget rows hẹp, phase Đang duyệt + per-NV flag). KHÔNG default expand Drafter scope cho Approver.

Pattern 9: Defense-in-depth FE+BE guard pair

UI disabled={!canX} + BE helper EnsureCanXAsync(id, userId) throw 403 (NOT inline handler) — tránh forge qua DevTools. Bất kỳ action sensitive (approve/reject/adjust).

Pattern 12-bis: Cross-module entity cookie-cutter mirror (S29 Plan B, proven 3×)

"Mirror entity X từ module A→B": 6 file MAX — (1) new entity Domain/<Mod>/<Entity>.cs rename FK+nav · (2) parent +nav collection · (3) IApplicationDbContext +DbSet · (4) ApplicationDbContext +Set<X>() · (5) new <Entity>Configuration.cs (separate file mirror PE, NOT inline) · (6) dotnet ef migrations add 3-file. AuditableEntity inherit. FK: parent Cascade + 3rd-party Restrict + User skip-nav (denorm <Type>ByFullName). Apply 2 DB. ⚠️ Catalog-mega variant (S35 HrmConfig): HRM entities KHÔNG có global HasQueryFilter(!IsDeleted) (vs Master) → list query MUST .Where(!IsDeleted) thủ công (verify Grep HasQueryFilter Configurations FIRST). Validator MaxLength MATCH EF config (verify source-of-truth, KHÔNG trust spec blind).

Pattern 12-ter: N≤7 satellite CRUD scaffold same parent (S34, feedback_within_module_n_satellite_scaffold)

"N satellite cùng parent" → 1 mega file <Parent>SatelliteFeatures.cs N region cookie-cutter (Create verify parent AnyAsync → Update FirstOrDefault !IsDeleted → Delete soft IsDeleted+DeletedAt+DeletedBy ICurrentUser) + 1 Controller extend (3 verb × N). Endpoint verify parentId==cmd.ParentId BadRequest mismatch. Per-action policy override class-level Read.

Patterns moved (split S39)

• FE patterns (5 mirror 2-app · 6 VND helpers · 13 read-only Designer · 14 Tailwind JIT palette · 15 rowSpan builder · 16-bis 4-place mirror) → implementer-frontend MEMORY (seeded).
• Test patterns (10 reflection authz · 11 test infra helper · 12 InternalsVisibleTo) → test-specialist MEMORY (seeded).

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⚠️ Anti-patterns (DO NOT)

1. ❌ Skip MEMORY · 2. ❌ --no-verify · 3. ❌ git add -A/git add . (specific files) · 4. ❌ Touch outside spec scope · 5. ❌ Push remote autonomous (em main pushes) · 6. ❌ Modify SolutionErp.slnx autonomous · 7. ❌ Lower bar match em main (Smart Friend) · 8. ❌ Proceed khi ambiguity >20% → REFUSE

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🧠 SOLUTION_ERP BE conventions (S40)

• BE .NET 10: PascalCase entities + DTO records + command names. CQRS+MediatR+FluentValidation+AutoMapper. Repository qua IApplicationDbContext. GlobalExceptionMiddleware → ProblemDetails (NO try-catch controllers).
• State S40: 40 mig (last AddAttendances) · 84 SQL tables · ~211 endpoints · 130 test baseline (test-specialist owns). Phase 9 UAT skip per chunk (feedback_uat_skip_verify).
• Build: dotnet build SolutionErp.slnx clean 0 err. Commit [CLAUDE] <scope>: <msg> + Co-Authored-By Claude Opus 4.8 (1M context).
• Pin (KHÔNG */latest): MediatR 12.4.1 (14 fail DI) · Swashbuckle 6.9.0 · Node CI 20.x · LibreOffice 25.8.6 · @microsoft/signalr 8.0.7.

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📅 Recent activity (FIFO — older → archive/git)

• S35 G-H2 BE CRUD 4 catalog (HrmConfigFeatures.cs 372 LOC + Controller 134 LOC, 16 endpoint): Pattern 12-bis 3rd application catalog-mega. 4 sub-resource × 4 verb. KEY: HRM no HasQueryFilter → .Where(!IsDeleted) manual; Validator MaxLength = EF source-of-truth (Code=50 not spec 20). 130 test baseline preserve. ACCEPT clean spec 95%. Tag [s35, be-crud, hrm, 12-bis-3x].
• S29 Plan B Chunk C Contract V2 mirror (Mig 33 ContractLevelOpinions): Pattern 12-bis 1st — 8 file +4265 LOC (Designer autogen 95%, handcraft ~232 LOC). Em main spec deterministic 100% → ACCEPT. Tag [s29, plan-b, 12-bis].
• Archived FE/test + older BE entries → archive/2026-05-q4.md + git d2f52ba (S40 curate): S35 FE inline forms 5 satellite (→ frontend domain) · S34 test bundle +10 [Fact] 130 PASS (→ test-specialist domain) · S33 Task 5 EmployeesListPage · S32 wrap/startup. KEY absorbed in Patterns above + split pointers.

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🔄 Curate trigger

• 25KB → archive recent → archive/<period>.md. Stale >3mo → remove.

• Last curate: 2026-05-29 S40 em main proxy (30.9→~18KB): dedup split — removed FE patterns (5/6/13/14/15/16-bis → implementer-frontend) + test patterns (10/11/12 → test-specialist), condensed Pattern 12-bis/12-ter, refreshed stale (104/111→130 test, Opus 4.7→4.8 model). BE patterns 1-4/7-9/12-bis/12-ter foundation preserved. Prev: S34 q3 · S32 q2 · S22 q1.