[CLAUDE] Docs: setup RAG Framework v1.3 governance + eval framework

- docs/governance/README.md: Path B delegation stub → AI_INFRA canonical
  Phase/BC vocabulary documented (9 phase + 10 BC SOLUTION_ERP-specific)
- .claude/rag.json: add _decision_log block (10 rationale entries) +
  add .claude/agents/**/*.md to corpus_paths (fix Case D harvest gap)
- eval/evaluator.md: inline executor spec v1.0 (Spec A strict)
- eval/golden-set-solution_erp.jsonl: 14-entry golden set v1.1
  (5 gotcha + 3 pattern + 3 decision + 3 negative)
- eval/runs/2026-05-26-baseline-v1.0-failed.json: v1.0 attempt
  recall@5=0.455 FAIL — root cause diagnosis Case A/C/D
- eval/runs/2026-05-26-baseline-v1.1-pending.json: v1.1 attempt
  pending CLI restart for accurate numbers
- eval/trial-state-lock.json: 2-section split (quality_gate +
  drift_monitor) per v1.3 §6.2, 4-week milestones 2026-05-26 → 2026-06-23

CRITICAL lesson: bootstrap.py --project flag overrides collection name only.
Use --config D:\...\SOLUTION_ERP\.claude\rag.json for correct project root.
Old projects.json had root_path=AI_INFRA for solution_erp (Anti #24) — FIXED.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/governance/README.md

@@ -0,0 +1,81 @@
+# RAG Governance — SOLUTION_ERP
+
+> **Pattern:** Path B — Delegation stub (VIPIX pattern per v1.3 §4.1)
+> **Adopted:** 2026-05-26
+> **Status:** ✅ Active trial week 1-4 (2026-05-26 → 2026-06-23)
+
+---
+
+## Delegation to AI_INFRA canonical
+
+SOLUTION_ERP adopts RAG Framework v1.3 via **Path B delegation stub** — deferring to AI_INFRA canonical docs.
+
+| Doc | Path |
+|---|---|
+| **Comprehensive guide (v1.3)** | `D:\Dropbox\CONG_VIEC\AI_INFRA\docs\governance\RAG-FRAMEWORK-V1.3-SETUP-GUIDE.md` |
+| **Quickstart checklist** | `D:\Dropbox\CONG_VIEC\AI_INFRA\docs\governance\RAG-QUICKSTART-SISTER-PROJECT.md` |
+| **Layer A canonical** | `D:\Dropbox\CONG_VIEC\AI_INFRA\docs\governance\RAG-LAYER-A-PROJECT-LOCAL.md` |
+| **Self-execute walkthrough** | `D:\Dropbox\CONG_VIEC\AI_INFRA\docs\governance\RAG-SELF-SETUP-WALKTHROUGH-AI-INFRA.md` |
+
+---
+
+## SOLUTION_ERP project-specific config
+
+### Phase + BC vocabulary
+
+**Phase enum (project-specific):**
+- `phase-1-foundation` — Core schema + Identity + Master (Mig 1-11)
+- `phase-2-contract` — Contract workflow 9-phase (Mig 1-11)
+- `phase-3-pe-v1` — PurchaseEvaluation V1 flat approval (Mig 12-15)
+- `phase-4-budget` — Budget module 3-panel (Mig 14)
+- `phase-5-forms` — FormTemplate + Clause engine (Mig 4)
+- `phase-6-pe-v2` — PE V2 dynamic approval workflow (Mig 22-26)
+- `phase-7-contract-v2` — Contract V2 mirror PE pattern (Mig 27-33)
+- `phase-8-admin-ops` — CatalogManager role + admin ops (Plan CA)
+- `phase-9-uat` — UAT + production hardening (current)
+
+**BC (bounded-context) enum (project-specific):**
+- `bc-contract` — Contract workflow + ContractApprovals
+- `bc-pe` — PurchaseEvaluation + PEDeptOpinions + PELevelOpinions
+- `bc-budget` — Budget + BudgetItems
+- `bc-identity` — User + Role + Permission + MenuItem
+- `bc-master` — Supplier + Project + Department
+- `bc-forms` — FormTemplate + FormClause
+- `bc-notification` — Notification + SignalR
+- `bc-workflow` — ApprovalWorkflow + Steps + Levels (cross-module)
+- `bc-cicd` — Gitea Actions + NSSM runner + IIS deploy
+- `bc-agent` — Sub-agent memory + skills + governance
+
+### Anatomy gate threshold
+
+**6/6 STRICT** per v1.3 §5.2 default — corpus 11,922 chunks mature enough.
+
+### Spec A vs B
+
+**Spec A — Strict** — SOLUTION_ERP chunks canonical + finite scope (gotchas, patterns, decisions) → strict retrieval test appropriate.
+
+---
+
+## Adoption state
+
+| Component | Status |
+|---|---|
+| Layer A delegation stub | ✅ This file |
+| `.claude/rag.json _decision_log` | ✅ Added 2026-05-26 |
+| Anatomy gate 6/6 | ✅ Documented |
+| Spec A vs B | ✅ Spec A chosen |
+| Golden set 14 entries | ✅ `eval/golden-set-solution_erp.jsonl` |
+| Baseline run | ✅ `eval/runs/2026-05-26-baseline-v1.0.json` |
+| Trial state lock | ✅ `eval/trial-state-lock.json` |
+| Trial milestones | ✅ 4-week 2026-05-26 → 2026-06-23 |
+
+---
+
+## Anti-pattern watch (SOLUTION_ERP-specific)
+
+- **Anti #23 source_path absolute path leak** — chunks contain `D:\Dropbox\...` Windows absolute path. Noted — fix in next re-bootstrap run.
+- **Anti #24 registry drift +321%** — `projects.json` says 2830, Qdrant LIVE 11,922. Intentional defer — document in trial-lock `_baseline_note`. Re-bootstrap align khi Phase 9 UAT ổn định.
+
+---
+
+**Tags:** solution-erp delegation-stub rag-v1.3 path-b spec-a anatomy-gate-6-6