[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/rag.json

@@ -0,0 +1,25 @@
+{
+  "project_id": "solution_erp",
+  "display_name": "SOLUTION_ERP — Quản lý HĐ NCC",
+  "corpus_paths": [
+    "docs/**/*.md",
+    ".claude/agent-memory/**/MEMORY.md",
+    ".claude/skills/**/SKILL.md"
+  ],
+  "exclude_paths": [
+    "docs/_archive/**",
+    "node_modules/**",
+    "bin/**",
+    "obj/**",
+    ".git/**"
+  ],
+  "extra_corpus": [
+    "C:\\Users\\pqhuy\\.claude\\projects\\D--Dropbox-CONG-VIEC-SOLUTION\\memory\\*.md"
+  ],
+  "share_to_global": true,
+  "search_scope_default": ["self", "shared_global"],
+  "auto_reindex": true,
+  "chunk_size": 1500,
+  "chunk_overlap": 200,
+  "contextual_retrieval": true
+}