[CLAUDE] Docs: S131-S132 session-end — 3-gap báo hub + E-011/AS-15 nghi-thức-chạy-tắt + dồn H1/H2 S127→S131 (GAPS→CLOSED) + seed 2 diary H24 + ghi bù timeline S127-S129

- S131: 2 email hub stamped (3-gap e46863c8 + closure-cadence 641bf8ca ĐANG BÀN) + adap-report H24 §6 + tick 6→7; chết session-limit giữa §L.b → S132 /tiep nối verify-5/5
- E-011 + AS-15 error-ledger: 3 closeout S128-S130 chạy tắt (kẽ thiết-kế H22 pause/tiep ⟂ §L.b); guard episodic verified-S132; wire-tick-/tiep CHỜ ANH GẬT
- H2 dồn: 0-orphan/31 run.md · seed lead-{view,omission}-auditor MEMORY (retro S124 8379B/9967B) · rmdir stray S119 · S130 solo không nợ
- H1 dồn: rag-onboarding-guide:118/:134 contextual_retrieval true→false + gỡ "+15% recall" chưa-đo (owner-final f5ce2778); roster 14/14 khớp 4-nguồn; reviewer-gate verified-pending → spawn-probe carry
- STATUS +2 block (S131+S132 + ghi-bù S127→S129) · HANDOFF segment mới RE-STAMP 8 carry · session-log kèm marker Sàn-5 wf-run-id S127-S128
- (j) counter=7 · light 4/6 · deep 4/15 · OVERDUE none · (i) spot-check 3/3 · (h) n-a · curate reviewer 20.3→16.8KB seal-verified (S128, gộp từ wal-flush)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/guides/rag-onboarding-guide.md

@@ -115,7 +115,7 @@ Template generic:
   "auto_reindex": true,
   "chunk_size": 1500,
   "chunk_overlap": 200,
-  "contextual_retrieval": true
+  "contextual_retrieval": false
 }
 ```
 
@@ -131,7 +131,7 @@ Template generic:
 | `share_to_global` | **CRITICAL DECISION:** `true` = chunks promote-able to shared_global collection (cross-project search visible). `false` = client confidential, chỉ self-project access. **Em main project decide based on data sensitivity** (vd DH Y Dược client → `false`, NamGroup internal HRM → `true`). |
 | `search_scope_default` | Default `["self", "shared_global"]` - cân bằng project-specific + cross-project pattern reuse |
 | `chunk_size` / `chunk_overlap` | Default 1500/200 chars - đã tune cho MD docs Vietnamese. KHÔNG đổi unless project có docs structure khác hẳn. |
-| `contextual_retrieval` | `true` - Anthropic Contextual Retrieval prepend "From <doc> > <heading>:" - +15% recall |
+| `contextual_retrieval` | `false` — **OWNER-FINAL fleet-wide 2026-07-16** (broadcast `f5ce2778`; default khung `projects.py:39` cũng `False`). Flag chỉ gate structural title-prepend "From <doc> > <heading>:" ở chunking (0 API-call); recall-delta CHƯA đo (hub khai) — claim "+15%" cũ là số Anthropic-paper, không phải đo fleet. Dự-án mới: GIỮ `false`. |
 
 ### Step 2: Run bootstrap