[CLAUDE] Docs: Session 26 chốt cuối — 6 Plan AG series PE tree view + Plan AI RAG global MCP setup

Update:
- docs/STATUS.md: Last updated S26 cumulative wrap
- docs/HANDOFF.md: TL;DR S26 chốt cuối với 3 pattern reusable NEW
- docs/changelog/sessions/2026-05-21-s26-pe-tree-view-rag-setup.md: NEW session log đầy đủ
- docs/guides/multi-agent-setup-guide.md: NEW ~750 lines onboarding 4 dự án future
- .claude/agent-memory/*/MEMORY.md: 4 agent flush S26 entries
- .claude/rag.json: NEW project config cho RAG bootstrap

Plans done S26:
- Plan AG/AG2/AG3/AG4/AG5/AG6 — 6 commits 0bf6c7e..d99069a PE List tree view UI iteration
- Plan AI Phase 0-4 — RAG global MCP setup (Voyage-4-large + Qdrant Windows native binary v1.18.0 NO Docker + FastMCP 3.3.1 stdio + SQLite FTS5 BM25 + RRF k=60 + Anthropic Contextual Retrieval prepend)
- SOLUTION_ERP bootstrap: 126 files → 2,392 chunks indexed 60.9s (~484K Voyage tokens = 0.24% free tier 200M/month)

Multi-agent ROI S26: 5 spawn (Inv 2 audit 5Q + RAG distribution research 4 study cases + Imp 1 Case 2 + Rev 1 pre-commit + CICD 1 Run #222) ~123K + em main solo Plan AG2-AG6 polish + Plan AI Phase 0-4 ~280K = ~28% solo equivalent.

3 patterns reusable cross-project NEW S26:
1. Pattern 19 Implementer — HTML native <details>/<summary> + Tailwind named groups (group/proj+year+sup) + localStorage Set<string> cho hierarchical 3-level tree UI when no Accordion lib
2. RAG User-level Global MCP — 1 server localhost serve N project + per-project .claude/rag.json (Approach A — 1 dev solo scenario, không phải team VPS)
3. Qdrant Windows native binary deployment — no Docker overhead, qdrant-x86_64-pc-windows-msvc.zip 28.3MB chính thức GitHub release

Pending S27+:
- Memory CURATE 4 agent (cicd-monitor 74KB OVER 50KB hard threshold URGENT)
- Plan AI Phase 5 bootstrap 4 project còn lại (NamGroup/DH Y Dược/Ashico/Vipix)
- Plan AI Phase 6 file watcher + Windows Task Scheduler

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.claude/agent-memory/cicd-monitor/MEMORY.md

@@ -139,6 +139,8 @@ Flag commit nếu thấy `<PackageReference Include="MediatR" Version="14...` ho
 
 ## 📅 Recent runs (FIFO last 20)
 
+- **2026-05-21 (S26 Run #222 PASS Plan AG + 5 subsequent runs em main solo verify):** Run #222 sha=`0bf6c7e` Plan AG Phase 1 PE List tree view 2-level — Stage 4d bundle hash 2/2 ROTATED ✓ (admin `C8TvDy7r → CWHIdoFo`, user `BvcWrq2z → Bg2FNeIz`), Stage 4a admin token 468 + nv.test token 477, Stage 4b smoke 5/5 endpoints 200, Stage 4c PE List API shape preserved (all 9 fields present: maPhieu/tenGoiThau/type/phase/projectId/projectName/selectedSupplierName/contractId/createdAt). Test gate 111 unchanged. Mig 31 prod unchanged. Token ~12k. **Subsequent Plan AG2-AG6 (5 commits `c5429c0..d99069a`) em main solo verify** — CICD KHÔNG spawn per UAT iteration mode `feedback_uat_skip_verify` + cost ~150K spawn × 5 = ~750K wasteful for trivial UI polish. Em main verify mỗi push: git push success + Gitea auto-trigger build → wait ~3-4min deploy → bundle hash visual check (KHÔNG full smoke). Plan AG4 BE+FE cross-stack (DTO + 3 projection JOIN Users+Departments + FE PE card render): dotnet test 111/111 PASS local verify trước push. **Pattern saved: CICD Monitor spawn 1 lần đầu tiên Phase wire (Plan AG initial) — verify bundle rotate baseline + endpoint shape. Subsequent polish chunks (CSS/UX/copy)** trong cùng Plan: em main self-verify bundle visual + smoke 1 endpoint, KHÔNG re-spawn. ROI tốt cho 1 dev solo iteration scenario. **Cumulative S26 6 runs** #222 (AG) + #223 (AG2) + #224 (AG3) + #225 (AG4) + #226 (AG5) + #227 (AG6) verified PASS by em main bundle check + visual confirm bro UAT. 0 prod regression. **Memory size BEFORE update ~72KB, AFTER ~74KB — CRITICAL CURATE next session priority MAX URGENT** (archive Run #186-#221 verbose entries to `archive/2026-05-runs.md` + keep Run #222-#227 + summary cumulative).
+
 - **2026-05-19 13:05-13:08 — Run #221 id=335 sha=`506cada` VERDICT=PASS (S25 t7 Plan AF — FE userMap fallback resolve historical entries pre-Plan AE).** Push range cumulative S25 remote = `e23f51c..506cada` (7 commits Plan AB+AC+AC2+AD+AE+AF since S24). Tip commit Plan AF: 2 FE-only files mirror `fe-user/src/components/pe/PeDetailTabs.tsx` (+74 LOC, ApprovalsTab+HistoryTab userMap useMemo + resolveActorName/resolveUserName helpers) + `fe-admin/src/components/pe/PeDetailTabs.tsx` (+70 LOC mirror §3.9 identical logic). Duration ~3m23s (~baseline). Pre-push em main local: npm build × fe-user PASS 0 TS err (9.12s), npm build × fe-admin PASS 0 TS err (8.91s), BE unchanged from 9ea62be. Status poll 5 iter (13:06→13:08) status `running → success`. **CRITICAL Stage 4c Plan AF wire VERIFY ✓:** Endpoint `GET /api/purchase-evaluations/3248f2f9-c6e9-43ff-a4ca-067ffecf9f36` returns PeDetailBundle with ALL 5 userMap data sources present: `drafterUserId=ce7eb96a` + `drafterName="Nguyễn Văn Duy"` ✓, `approvals` (6 entries) ✓, `levelOpinions` (5 entries) ✓, `departmentOpinions` (0 entries — field present, no rows OK) ✓, `approvalFlow.steps` (3 steps with nested levels.approvers) ✓. FE userMap useMemo will build composite lookup từ embedded domain data, NO extra API contract change. Stage 4a Auth admin: HTTP 200 token len 468 ✓ (password `Admin@123456`, accessToken field). Stage 4b Smoke 5/5 endpoints 200 ✓ (`/api/purchase-evaluations`, `/api/contracts`, `/api/menus`, `/api/users`, `/api/purchase-evaluations/{id}`). **Stage 4d Bundle hash 2/2 ROTATED ✓ as expected (FE touch):** admin `DR95zKWg → C8TvDy7r` ✓, user `BAj_Yaj5 → BvcWrq2z` ✓. Stage 4e Health ready 200 + Health live 200 ✓. Mig prod TOP 1 = `20260514160124_RefactorSkipToFinalToApproverLevel` (Mig 31) unchanged ✓ (Plan AF no schema change). **Discovery 1 — 503 mid-deploy expected:** During IIS publish step API returned 503 Service Unavailable ~13:08:07 (app pool recycle window ~5-15s before deploy stage complete), self-recovered post-deploy 200. Discovery 2 — Auth route NOT `/api/v1/auth/login` (404) but `/api/auth/login` (CLAUDE.md route). Token field NOT `token` but `accessToken`. **Pattern saved Plan AF — FE userMap fallback synthetic recovery for audit trail:** When historical entries with empty `userName` field exist pre-data-fix deploy (Plan AE forward-only fix BE side), apply **FE-only fallback lookup builder pattern** using embedded domain bundle data sources (drafter + approvals + workflow approvers + opinions). Build composite Map<userId, fullName> via useMemo at top of Tab component, expose resolveXxxName(entry) helper: 1) trust entry.userName if non-empty, 2) lookup userMap by entry.userId, 3) fallback "Hệ thống". Reusable cho Contract changelog audit + Budget changelog audit historical recovery without extra API contract change (avoid /api/users admin-only permission constraint for non-admin viewers). Mirror 2 FE app §3.9 identical logic. Token cost ~10k. **Memory size BEFORE update ~69KB, AFTER ~72KB — DEDICATED CURATION SESSION REQUIRED NEXT (archive Run #186-#210 + S22-S24 verbose entries to `archive/2026-05.md` priority MAX REINFORCED).**
 
 - **2026-05-19 12:33-12:36 — Run #220 id=334 sha=`9ea62be` VERDICT=PASS (S25 t6 Plan AE — Changelog UserName 9 sites populate via ICurrentUser.FullName fallback Email).** Push range cumulative S25 remote = `e23f51c..9ea62be` (6 commits Plan AB+AC+AC2+AD+AE since S24). Tip commit Plan AE: 2 BE-only files `PurchaseEvaluationFeatures.cs` (+6 LOC, 4 sites: Create×2/UpdateDraft/AdjustBudget) + `PurchaseEvaluationDetailFeatures.cs` (+7 LOC, 5 sites: 1 inside if-block 16-space indent) — uniform pattern `UserName = currentUser.FullName ?? currentUser.Email`. Duration ~3m25s (~baseline). Pre-push em main local: `dotnet test SolutionErp.slnx` PASS 111/111 (~5s). Status poll 4 iter (12:33→12:36) status `running → success`. **CRITICAL Stage 4c Plan AE wire VERIFY ✓:** Endpoint `/api/purchase-evaluations/3248f2f9-c6e9-43ff-a4ca-067ffecf9f36/changelogs` returns 20 entries len 6822 bytes. Response shape has `userName` field accessible ✓. **Pre/Post split observed live:** Recent LogTransition entries (`entityType=5`) at 02:31-02:36 have populated `userName` ("Nguyễn Văn Trường", "Bùi Lê Thủy Trà", "Phan Văn Chương") because LogTransitionAsync already sets UserName independently. **The Budget Adjust entry at 02:31:39 `entityType=1` summary="Điều chỉnh ngân sách: tên..." has `userName=""` empty** — this is the EXACT pre-fix Bug 1 evidence: entry logged by old AdjustPurchaseEvaluationBudgetCommandHandler code BEFORE Plan AE deploy (existing stale entry from Run #216 prod time pre-Plan-AE). Post-Plan AE deploy: new Budget Adjust action will populate userName correctly (FullName fallback Email). Bro test verification: trigger 1 Budget Adjust on any PE → next entry will show userName ✓. Stage 4a Auth admin: HTTP 200 token len 468 ✓. Stage 4b Smoke 5/5 endpoints 200 ✓ (`/api/purchase-evaluations`, `/api/contracts`, `/api/menus`, `/api/users`, `/api/purchase-evaluations/.../changelogs`). **Stage 4d Bundle hash 2/2 UNCHANGED ✓ as expected (BE-only commit):** admin `DR95zKWg` (= Run #219 baseline), user `BAj_Yaj5` (= Run #219 baseline). Stage 4e Health ready 200 "Healthy" + Health live 200 ✓. Mig prod TOP 1 = `20260514160124_RefactorSkipToFinalToApproverLevel` (Mig 31) unchanged ✓ (Plan AE no schema change). **Pattern saved Plan AE — Changelog audit log UserName populate batch:** When detecting systemic gap "Changelog field X not set in N similar Add() sites" (Bug ngày 19/5 bro report Budget Adjust empty user column), do **preventive batch fix across ALL Changelog.Add() sites in same domain** (PE = 9 sites: 4 Features + 5 DetailFeatures), KHÔNG chỉ fix 1 site phát hiện. Pattern reusable for Contract changelog + Budget changelog future (similar entity types with audit trail). Source pattern `UserName = currentUser.FullName ?? currentUser.Email` — assumes ICurrentUser is injected scoped DI (already standard). Side benefit: 8 preventive sites future-proof against same bug pattern. Token cost ~14k. **Memory size BEFORE update ~66KB, AFTER ~69KB — STRONG CURATE REQUIRED next session (defer dedicated curate priority MAX).**

.claude/agent-memory/investigator/MEMORY.md

@@ -153,3 +153,7 @@ Last curate: 2026-05-11 (initial seed)
 - **2026-05-19 (S25 t1 spawn audit 2 bug critical UAT — Changelog logging missing):** Em main report 2 bug UAT: (1) Budget Adjust 2×click → "Lịch sử thay đổi" KHÔNG show 2 entry. (2) Return Assignee mode F1 click → "Lịch sử thay đổi" KHÔNG show return action. Audit 5Q: Q1-DB state Prod SSH fail (auth), fallback code inspect. Q2-Budget handler: `PurchaseEvaluationFeatures.cs:379-387` **ĐÃ log changelog** EntityType=Header + Action=Update + summary diff → **code ĐÚNG, likelihood FE filter bug or UAT DB stale**. Q3-Return handler: `PurchaseEvaluationWorkflowService.cs:215-378 ApplyReturnModeAsync` **ZERO changelog log** — 4 mode branches (OneLevel/OneStep/Assignee/Drafter) mutate pointers only, return summary, caller `TransitionAsync:100 LogTransitionAsync` only logs phase transition KHÔNG log mode side-effect. Q4-Schema: `PurchaseEvaluationChangelog.cs` support EntityType=Workflow(5) enum but **ZERO code populate** — schema incomplete missing Kind/ChangeType subtype enum to disambiguate "budget adjust" vs "detail edit" vs "return mode" (all Header/Workflow entity cùng Action.Update). Q5-FE: Query handler `ListPurchaseEvaluationChangelogsQueryHandler:1050-1064` **KHÔNG filter logic** — returns ALL entities. FE query component unknown (fe-user source not easily searchable) but **likely filter EntityType == (Supplier|Detail|Quote)** omit Header+Workflow → Bug 1 Budget (Header type) hidden, Bug 2 Return (Workflow type unlogged vậy). Root cause B1: FE filter skip Header updates OR Schema gap (Header.Update collision: budget vs section 2 edit). Root cause B2: Handler **intentionally skip logging** (no companion audit table like PurchaseEvaluationApprovals for return history). Fix path B1: Option A (add Kind enum — 30 LOC schema+handlers) vs B (extend EntityType — 20 LOC) vs C (FE filter conditional show Budget — 10 LOC FE). Fix path B2: Add `db.PurchaseEvaluationChangelogs.Add()` per mode (15-25 LOC 1 file). Cross-ref pattern memory: S23 t3 lookup bug (Level.Order collision per-NV Mig 29) — schema Mig 29 OR-of-N refactor created similar subtype ambiguity. Surprise: `EntityType.Workflow=5` enum value design-only, unused 4+ mig history. Recommendation: B2 fix first (clear win, 1 file BE), then B1 design (schema + cross-module pattern audit Contracts). Token ~28k.
 - **2026-05-19 (S25 wrap — Plan AB Bug 1+2 audit + 6 follow-up plans em main solo):** Pre-Plan AB audit ~28K confirm root cause: Bug 1 Budget Adjust Handler ĐÃ log Changelog (Header+Update) nhưng FE HistoryTab filter strict TraLai-only loại. Bug 2 ApplyReturnModeAsync 4 mode KHÔNG add Changelog.Add() — chỉ caller LogTransitionAsync log phase transition. Recommended fix path: BE add log return mode + FE filter relax + Decision badge differentiation. **Subsequent em main solo follow-ups** (Plan AC..AF, KHÔNG re-spawn Investigator): AC capture pre-call Step/Level state + skipToFinal comment enrich + FE Decision badge; AC2 FE merge synthetic Reject rows từ Changelog (reversible recovery KHÔNG DB touch); AD drop misleading dual-phase badges + parse semantic next-target hint via regex `Chuyển phase X → Y` + comment keyword "Trả về"/"vượt cấp"; AE BE preventive batch UserName fix 9 Changelog.Add sites (Drafter+Detail+Quote+Adjust); AF FE userMap fallback từ embedded domain data PeDetailBundle (drafter+approvals+approvalFlow+levelOpinions+departmentOpinions) — no extra API fetch. **Patterns reusable Contract V2 audit recovery + Budget changelog UI:** (a) synthetic recovery FE merge từ existing audit table, (b) userMap fallback từ embedded domain data, (c) drop misleading badges + semantic hint via regex parsing, (d) preventive batch fix systemic gap. Cross-ref `feedback_service_hook_vs_endpoint` (audit log derived state) + new pattern user-level: FE merge synthetic + userMap fallback. **Tokens cumulative em main this session ~340K (mostly solo iterations, sub-agent leverage ~62K total).** **CICD result:** 7 commits `e23f51c..506cada` push remote, runs #215 FAIL (Plan M tests SQLite tie-break re-emerge) → #216 PASS (Chunk A2 SQLite tie-break fix) → #217-#221 PASS streak. Gotcha #48 SQLite tie-break pending docs.
 
+- **2026-05-21 (S26 spawn Plan AG 5Q audit — PE List tree view feedback Tra Sol):** Bro UAT 2026-05-21 screenshot phàn nàn UI Duyệt NCC flat list "đám rừng" + propose Outlook-style folder template. Em main spawn Investigator audit 5Q: Q1 prod data scale (SSH auth fail, fallback code inspect — ~50-200 projects × 5-15 PE typical). Q2 Project entity `Master/Project.cs:5-14` extends AuditableEntity với Code+Name+dates+Budget+PM+Note, **MISSING MaxLength + navigation tới PE** → ready for Phase 2 ProjectPackage table mở rộng. Q3 PE List structure `PurchaseEvaluationsListPage.tsx:133` 3-panel grid `lg:grid-cols-[340px_1fr_360px]` flat `<ul><li>` line 199-252 + pageSize 50 + filter type/phase/awId/search. Q4 shadcn fe-user component GAP **THIẾU Accordion/Collapsible/Tree/Card/Badge** (chỉ Button/Dialog/Input/Label/Select/Textarea) → Phase 1 fallback HTML `<details>/<summary>` native + inline badge `<div>` (verified S24 Plan AA pattern). Q5 Mig 32 prep naming `AddProjectPackageTable` follow cumulative pattern. **Recommend Approach C Hybrid: Phase 1 FE-only group view ~160 LOC × 2 app (1-2 ngày) + Phase 2 ProjectPackage schema (3-5 ngày defer post-UAT). Implementer Case 2 cookie-cutter mirror 2 app ACCEPT.** Token ~30k.
+
+- **2026-05-21 (S26 spawn Plan AI RAG distribution research — 4 study cases industry-validated):** Bro plan setup RAG cho 5 dự án cùng máy localhost share infrastructure. Investigator deep research 7Q: Anthropic patterns + community tools + multi-tenant architecture + distribution mechanism + auth + cost + sync. **Findings 4 study cases:** (1) **Cursor** — Merkle tree + Turbopuffer + 92% similarity reuse pattern, secret key derived Git commit hash, per-team index sharing cut indexing hours→seconds. (2) **Cline Memory Bank** — markdown + JIT retrieval + git-native sync. (3) **Continue.dev Hub** — slug-based YAML config sharing centralized. (4) **Sourcegraph Cody** — interesting anti-pattern, BỎ embeddings sang Search API + graph IR scale 100K+ repos enterprise (alternative if good search infra sẵn). **Multi-tenant 3 patterns:** Single index (pool, cheap), Per-tenant isolated (silo, expensive), Hybrid base+delta (Cursor pattern). **Distribution combo winner cho 5-dev team:** FastMCP HTTP server VPS Hetzner $15/tháng + git-sync embeddings snapshots committed to private repo. Auth JWT RS256 + role scopes + document-level ACL. Cost reality 5 dev ~$20/month vs cloud Qdrant $50/month. Sync git-based weekly cron (real-time chỉ cần khi team > 10 dev). **Surprise:** Voyage AI **200M tokens/month free tier cover 5 devs** comfortably — coi như chỉ tốn $15 VPS. **Anthropic standards 9/9 matched** + community best practices 6/7 matched (Sourcegraph alternative N/A cho memory-heavy). Plan AI architecture chốt với em main: User-level Global MCP (Pattern C — 1 server localhost serve 5 project) thay vì team VPS pattern (anh single dev 5 dự án). Token ~40k.
+

.claude/agent-memory/reviewer/MEMORY.md

@@ -144,6 +144,8 @@ Flag commit nếu thấy `<PackageReference Include="MediatR" Version="14...` ho
 
 ## 📅 Recent activity (last 10 FIFO)
 
+- **2026-05-21 (S26 Plan AG pre-commit + 5 follow-up plans AG2-AG6 em main solo self-review):** Plan AG Chunk A+B+C pre-commit verify spawn 1× ~25K with 5-category checklist + 12 adversarial deep checks (A-L) PASS 0 critical/major/minor. Commit `0bf6c7e` 2 file +346/-116 LOC mirror IDENTICAL hash `21001E90...`. Wire claim verify: 3 chunk delivered (useMemo group nested + `<details>/<summary>` 2-level + localStorage Set persist). Schema 0 mig, 0 BE, 0 entity. Security: localStorage non-sensitive (projectId GUID + normalizedGoiThau text), XSS safe React auto-escape, no new [Authorize] needed (read-only view). Code quality: npm build × 2 PASS 0 TS err, anti-fiddle 0% drift, Mirror §3.9 byte-identical 21,521 bytes. Test coverage: Phase 9 UAT exception accept. Adversarial 12/12 PASS — edge case empty tenGoiThau/projectName/localStorage corrupt/Tailwind named groups/HTML details accessibility/degenerate cases/vi locale sort/filter-then-group order/bundle size delta. **Minor noted defer:** Selected PE inside collapsed tree không auto-expand path → recommend Plan AG2 useEffect watch selectedId. Recommendation: PASS proceed push. **Subsequent Plan AG2-AG6 em main solo self-review** (5 plan UI polish iteration UAT feedback bro Tra Sol — Panel 1 widen 400px, drop tầng gói thầu 1-level, drop single-PE flat consistent, add Drafter+Department BE+FE, 3-level Project>Năm>NCC>PE, compact card 3-row). Em main verify mỗi commit: SHA256 hash 2 file IDENTICAL + npm build × 2 app + dotnet test 111/111 PASS (Plan AG4 BE+FE cross-stack — dotnet build clean + 3 projection update LIST/INBOX/APPROVED). KHÔNG re-spawn Reviewer mỗi plan (mirror S24 Plan AA pattern: ROI thấp khi UI polish ~50-100 LOC per chunk + cost spawn ~25K × 5 = ~125K vô lý vs em main self-verify build pass + bro visual confirm). **Pattern reinforced**: Reviewer spawn 1 lần cho heavy cross-stack initial Chunk A+B+C (~370 LOC + 4 sub-agent collab), em main solo cho polish iteration. Cumulative S26 6 commits `0bf6c7e..d99069a` push remote: AG (`0bf6c7e`) + AG2 (`c5429c0`) + AG3 (`fbad4a9`) + AG4 (`2bf0118`) + AG5 (`083b601`) + AG6 (`d99069a`). 0 prod regression observed, test baseline 111 preserved. Smart Friend guard still active for next session feature spawn.
+
 - **2026-05-19 (S25 wrap — Plan AB pre-commit verify + 6 follow-up plans em main solo self-review + 1 lesson catched by CICD):** Plan AB Chunk A pre-commit verify spawn 1× ~22K with 5-category checklist + 8 adversarial deep checks PASS 0 blocker (1 minor V1 legacy fallback acceptable). Recommended PROCEED push cdfd542. **MISSED gotcha #48**: Multi-Changelog.Add() trong same SaveChangesAsync transaction → SQLite test frozen clock CreatedAt tie-break non-deterministic → Plan M existing tests `.OrderByDescending(CreatedAt).FirstAsync()` picked wrong entry → CI Run #215 FAIL. **Lesson reinforced**: UAT mode `feedback_uat_skip_verify` skip `dotnet test` per chunk risk recurring khi BE refactor > 100 LOC + signature change. Em main resumed local `dotnet test` post Plan AB Chunk A2 fix — caught by CICD test gate (no prod impact). **Em main solo self-review** Plan AC-AF (5 plans em main solo, Reviewer KHÔNG re-spawn — em main verify build+test+npm × 2 app mỗi chunk + CICD post-deploy verify thay vai pre-commit). Cumulative S25: 0 prod regression, 6 commits PASS CICD. **Pattern caught: SQLite frozen clock multi-row tie-break** — tests querying audit table cần discriminator beyond timestamp (EntityType + Summary keyword). Cross-ref future Contract V2 test setup. **Smart Friend guard still active** for future spawn — Reviewer should ADD test filter discriminator check vào Category 5 checklist post-S25.
 - **2026-05-19 (S25 Plan AB Chunk A pre-push verify, spawn):** Adversarial verify commit `cdfd542` Plan AB Chunk A — fix Changelog visibility 2 bug PE ID `3248f2f9` (Budget Adjust không hiện history + Trả lại Người chỉ định không log). Diff scope: 3 files +146/-95 LOC (BE PurchaseEvaluationWorkflowService.cs Service-only refactor + 2 FE PeDetailTabs.tsx mirror §3.9). **Verdict: PASS — 0 critical / 0 major / 1 minor observation — proceed push OK.** Wire BE: line 226-236 V1 legacy fallback return early UNCHANGED (giữ S17 behavior, KHÔNG log new Changelog — V1 phiếu read-only history per Mig 22-24 spec, acceptable). V2 ApplyReturnModeAsync refactor Drafter early return → if/else common path: Drafter mode line 285-292 set Phase=TraLai + clear pointer + SLA=null SEMANTIC IDENTICAL pre-refactor (only difference: removed `return` so fallthrough log block). OneLevel/OneStep/Assignee unchanged logic line 302-378 + SLA=AddDays(7) reset line 381. New `db.PurchaseEvaluationChangelogs.Add()` line 403-412 EntityType=Workflow(5) + Action=Update(2) + PhaseAtChange=evaluation.Phase (TraLai cho Drafter, ChoDuyet cho 3 mode khác) + UserId=actorUserId + UserName resolved via userManager.FindByIdAsync (mirror LogTransitionAsync line 700-704 pattern) + Summary `"Trả lại ({modeName}): {summary}"`. KHÔNG SaveChangesAsync mới — TransitionAsync caller line 101 downstream save persists. Wire FE 2 file `HistoryTab` filter extend 3 rule: ADD `summary.includes('Trả lại')` Workflow entity + ADD `entityType === Header(1) && summary.toLowerCase().includes('ngân sách')` cover Budget Adjust + empty placeholder text update Vietnamese chuẩn "Chưa có lịch sử trả lại / điều chỉnh ngân sách / gửi duyệt lại." Schema integrity: 0 migration mới (verify `git diff --name-only | grep Migrations/` empty); reuse PurchaseEvaluationChangelog Mig 12 + S21 t4 Mig 28 schema; PurchaseEvaluationEntityType enum line 25-33 + ChangelogAction enum ContractChangelog.cs:38-44 match BE values FE constant. Security: actorUserId param đã có từ caller TransitionAsync — non-admin user log đúng UserId không escalate permission; EF Core parameterized SQL default; FE substring filter trên BE-trusted Summary string không XSS risk. Code quality: dotnet build PASS 0 err 2 warn (DocxRenderer pre-existing); npm build fe-user PASS 394ms 0 TS err; npm build fe-admin PASS 421ms 0 TS err; anti-fiddle scope drift 0%; mirror 2 FE app §3.9 verify exact identical 17 lines (admin line 2033-2049 mirror user 2027-2043, chỉ shift 6 LOC do prior component lines khác). Test coverage: Phase 9 UAT exception ACCEPT per memory `feedback_uat_skip_verify` — test-after bundle defer (Bug fix Service refactor ideally test-before nhưng UAT mode skip OK). Cumulative state unchanged: 111 test baseline preserve. Adversarial deep checks all PASS: (1) **Drafter mode refactor regression** — line 285-292 set Phase=TraLai + clear pointer + SLA=null PRESERVED (S17 backward compat). V1 legacy 226-236 fallback return early no semantic change. (2) **Drafter summary redundancy** — `$"Trả lại (Người soạn thảo): Trả về Người soạn thảo"` redundancy acceptable (audit clarity > terseness; consistent format 4 mode). (3) **actorName resolve N+1** — single `userManager.FindByIdAsync` per ApplyReturnModeAsync invocation, mirror exact LogTransitionAsync line 700-704 pattern; KHÔNG N+1 (single call per transition). (4) **FE filter substring case** — `.includes('Trả lại')` exact match BE format `$"Trả lại ({modeName}): ..."` — case-sensitive Vietnamese diacritics lowercase 'l' match. (5) **FE placeholder Vietnamese** — "Chưa có lịch sử trả lại / điều chỉnh ngân sách / gửi duyệt lại." chuẩn Vietnamese diacritics. (6) **Comment update 5 bullet rule** — clear narrative, KHÔNG noise, Plan AB S25 marker rõ. (7) **Gotcha #45 regression** — Plan AB Service-only refactor KHÔNG đụng PE button TraLai click logic (gotcha #45 đã fix S21 t3 BE guard `decision != Reject throw line 64-72` defense), no regression. (8) **Anti-fiddle scope** — 3 file đúng spec, KHÔNG out-of-scope (no agent-memory commit, no docs/changelog touch). **Minor observation (non-block, design choice):** V1 legacy phiếu (line 226-236 fallback) return early TRƯỚC khi reach new Changelog.Add() block → V1 phiếu KHÔNG có new detailed "Trả lại (X): ..." log. FE filter `phaseAtChange === TraLai(98)` line 2042 vẫn catch V1 generic LogTransitionAsync log (V1 fallback set Phase=TraLai) → V1 history vẫn hiện (1 generic row "Chuyển phase X → TraLai" thay vì detailed mode breakdown). Acceptable per Mig 22-24 spec V1 = read-only history, không cần backfill audit detail. Recommendation: PASS proceed push remote. Smart Friend guard active.
 - **2026-05-15 (S24 Plan AA post-wrap cumulative finalize, no re-spawn):** Post-Chunk C learning append — em main iterate **4 polish chunks back-to-back** (`da218f1` px-2 hotfix + `4d60598` redesign v1 panel-per-NV color + `fbbd361` redesign v2 table layout rowSpan + `ee0902a` wrap fix sidebar label) UAT visual feedback bro, cumulative ~1.5h, KHÔNG Reviewer spawn. **Anti-pattern observed S24 polish chunks**: UI/UX iteration thuần CSS/layout KHÔNG cần Reviewer spawn mỗi chunk — cost overhead too high (~25K spawn × 4 = ~100K cumulative). Pattern reusable: chỉ self-verify build pass + bro visual confirm post-deploy là đủ. **Smart Friend guard validation S24**: Plan AA cumulative ~620 LOC qua 7 commits (`a1a910f..ee0902a`) — Reviewer spawn 1 lần (Chunk C cumulative A+B BE+FE wire) cost ~25K = ROI tốt. Multi-spawn polish chunks 4× sẽ ~100K = ROI thấp. **Pattern saved: BUNDLE cumulative verify cho heavy chunk (wire BE / migration / cross-stack), SKIP cho < 30 min polish (CSS / layout / color)**. **Discovery #3 anomaly re-tested S24**: Plan AA Run #210 sha=ac2c859 push range mixed BE+FE+docs → CICD trigger normal 4/4 wire end-to-end + bundle hash 2 app rotate. KHÔNG reinforce docs-only anomaly hypothesis (S22 #47 gap pending separate). Defer Investigator follow-up. **Low note S24**: BE filter `IsUserSelectable=false` non-admin leak workflow chưa ghim — defer follow-up (severity Low, workflow data non-sensitive, NOTE only — Smart Friend guard didn't escalate to block commit). CICD Monitor Run #210 sha=ac2c859 PASS verify 4/4 wire end-to-end + bundle hash 2 app rotate. Cumulative state unchanged S24: 31 mig, 111 test, 47 gotcha.