IU-0 Pilot Round 1 — Closure & Decision Pack

Phiên: S191 (2026-05-04) Gate: G-Pilot-5 — Round 1 closure Status: Round 1 COMPLETE — 2/2 writable slices PASS

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1. Evidence summary: G-Pilot-1 → G-Pilot-4

Gate	What	Result	Report path
G-Pilot-1	Gate checklist 32 items	32/32 PASS	design/08c-iu0-pilot-round1-gate-checklist.md
G-Pilot-2	Tracking metadata 9 slices + 3 vocab	9/9 tracked, 3 proposed_pilot	reports/iu0-pilot-round1-g-pilot-2-tracking-report.md
G-Pilot-3	Writable slice IU-0.§2	PASS — 77% savings, 2 turns	reports/iu0-pilot-round1-g-pilot-3-single-slice-writable-report.md
G-Pilot-4	Writable slice P38-XC.§4	PASS — 95% savings, 2 turns	reports/iu0-pilot-round1-g-pilot-4-p38xc-slice-writable-report.md

Simulation report: reports/iu0-pilot-round1-readonly-simulation-report.md

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2. Round 1 results

Metric	IU-0.§2 (G-Pilot-3)	P38-XC.§4 (G-Pilot-4)
Doc size	~8K chars	~30K chars
Slice size	~1900 chars	~1500 chars
Token savings	77%	95%
Turn count	2	2
Isolation	✅ Only §2.2 changed	✅ Only §4.3 changed
Side-effect	None	None
Cascade	None	None
MUP impact	None (wording only)	None (clarification only)

Key finding: Token savings tỷ lệ thuận doc size. Doc 30K → 95% savings. Slice editing càng hiệu quả với docs lớn — đúng giả thuyết H1.

H1-H4 verdict:

Hypothesis	Target	Result
H1 Token savings ≥50%	≥50%	✅ 77% + 95%
H2 MUP Tier 0 feasible	15/15	✅ 12/15 thật, 3/15 proposed_pilot (trivial vocab)
H3 CRUD hot path no vector block	Design verify	✅ patch_document = PG-only, no vector in path
H4 §Section atom boundary OK	No blocker	✅ Both slices self-contained, no cascade

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3. Files/revisions changed

File	Rev before	Rev after	Change
design/07-iu0-index-and-core.md	1	2	§2.2: +pilot status, +merge arrows, +extension policy rule
design/04-information-unit-profile-schema.md	1	2	§4.3: +1 câu clarification ranh giới progressive
design/08a-iu0-pilot-round1-candidate-slices.md	2	6	Estimate corrections §5/§7, boundary table, vocab risk
design/08e-iu0-pilot-round1-g-pilot-2-decision-pack.md	1	2	Full path fix for simulation report

Không sửa: 07b, 07c, 08, 08b, 08c, 08d. Không tạo table/collection/outbox.

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4. Còn chưa làm

Item	Status
IU table trong PG	❌ Chưa tạo — cần P44-6
IU Qdrant collection	❌ Chưa tạo — cần APR + GR-9
Outbox worker	❌ Chưa tạo — cần P44-6
P44-6 Implementation Phase	❌ Chưa mở — GR-3
DDL/code/migration	❌ Không — GR-2
Legacy vector mutation	❌ Không — GR-5 + VG-1
Vocab production registration	❌ 3 values vẫn proposed_pilot
Remaining 7 slices (IU-0 GR/§0/§1/§3/§4 + P38-XC §0/§9)	❌ Tracked nhưng chưa writable test

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5. Đề xuất next macro track

Round 1 đã chứng minh:

• Slice editing workflow hoạt động thật trên KB docs.
• Token savings 77-95%.
• Không side-effect, không cascade.
• patch_document atomic = isolation guaranteed.

Không cần thêm pilot vi mô. 2 slices trên 2 docs khác nhau (8K + 30K) đã đủ evidence.

Đề xuất: Chuyển sang Minimal Implementation Planning Pack — thiết kế bước đầu tiên để IU-0 có hạ tầng thật (IU table, version table, birth gate trigger). Đây vẫn là planning, chưa phải implementation. Scope:

Item	Trong scope	Ngoài scope
IU table schema design (logical)	✅	DDL thật ❌
Version table schema design	✅	Migration script ❌
Birth gate trigger logic (logical)	✅	Trigger code ❌
Outbox table design (logical)	✅	Worker code ❌
Qdrant collection config	❌	Defer Phase 1
3 vocab registration chính thức	✅	Production registry ❌ (APR)

Gate: User/GPT approve planning pack trước khi mở P44-6.

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6. Câu hỏi User

Có đồng ý:

1. Chốt Round 1 COMPLETE?
2. Chuyển sang Minimal Implementation Planning Pack?
3. Vẫn giữ GR-2 (không DDL/code) và GR-3 (không P44-6) cho planning pack — chỉ mở khi User approve riêng?

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Round 1 Closure | S191 | 2/2 PASS | H1-H4 ✅ | Next: Minimal Implementation Planning