02 — PLATFORM BRAIN

Context pack cho Travel OS · Engineering · Metadata registries · Graph · Plugin. Snapshot + trỏ canonical. Trạng thái: OMS 02.

Travel OS (sản phẩm/kiến trúc — design Phase 3)

• 17 bounded context · 40 event · Spine + Shared Kernel + Module + Vertical + Intelligence. Booking = Module #1. Canonical: travel-os/00, 02-ARCHITECTURE, 03-DOMAIN-MAP.
• Roadmap sản phẩm Phase 3→4→5: travel-os/10.

Engineering OS (cách làm việc)

• Gates · release train · RFC/ADR · ownership · tech radar · metrics. Canonical: engineering/00. Ownership context→team: engineering/09.

Metadata registries (packages/platform-core) — đã build

• Module Registry (17) — layer/owner/status/capability + dependency graph (DAG, sync/event). [M1]
• Event Registry (40) — producer/consumer/payload/category + sink classification (gateway/audit/billing/compliance/limits/any = non-module endpoint). [M2A/M2A.1]
• Entity Registry (18 + 17 relationship) — privacy/retention/source-of-truth, Account≠Customer guard. [M2B]
• Unified Metadata Graph (114 node / 307 edge, 5 node type / 10 edge type) — hợp nhất 3 registry; sync-cycle detect, event-cycle không fatal. [M2C]
• Code: packages/platform-core/src/{module,event,entity,metadata}/. Test: npm run test:core (66).

Emit / Schema / Check (artifact)

• npm run platform:metadata → docs/generated/platform-metadata/*.json (tất định) + schema/*.schema.json. [M3A/M3B]
• npm run platform:metadata:check → validate shape/counts/schemaVersion/no-secret/not-stale. Artifact README: generated/platform-metadata.

Graph → Founder Portal

• Projection toPlatform*Model → artifact → viewer /founder/travel-os. Xem 04-FOUNDER.

Plugin (design-only)

• Extension points / sandbox / marketplace — mới thiết kế. travel-os/08-PLUGIN-SDK.

Vocabulary canonical

• Bounded context / event / entity: knowledge-index + travel-os/03. Đừng tạo tên mới ngoài docs.

Current state · risks · next

• State: registries done (M1-M3B), viewer M4A. OMS 02.
• Risks: entity registry chưa đủ (Review/Payout…) · sink chưa mô hình hoá thành context/service · lifecycle edge chưa dùng. OMS 05.
• Next: 08-ROADMAP.

Nguyên tắc khi sửa metadata

Sửa **catalog trong platform-core/src/* (bám docs/travel-os) → npm run platform:metadata regenerate → platform:metadata:check. Không hardcode** artifact.