docs(M01): claim domain identity contracts

Work-Package: M01-FND-DOMAIN-IDENTITIES-001 Agent: sindo-main-codex
2026-07-13 16:05:55 +04:00
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+# M01-FND-DOMAIN-IDENTITIES-001 — Stable domain identity namespaces
+
+<!-- OPENWC_CLAIM:M01-FND-DOMAIN-IDENTITIES-001:sindo-main-codex:2026-07-15 -->
+
+## Ownership
+
+- Target: M01
+- Program: FND
+- Owner/Agent ID: sindo-main-codex
+- Branch: `work/sindo-main-codex/m01-domain-identities`
+- Lease expires UTC: 2026-07-15
+- Integrator: M01 milestone integrator
+
+## Outcome
+
+Add scene-free, immutable identity values for stable authored content,
+session-local entities, opaque WoW wire GUIDs and namespaced server entries so
+callers cannot silently interchange their numeric/string representations.
+
+## Non-goals
+
+- Allocating Content IDs, Entity IDs or server entries.
+- Decoding WoW GUID high types before the build-12340 protocol package.
+- Defining map/spell/item/quest/display/sound IDs in this package.
+- Migrating gameplay, network or Content Project consumers that do not exist yet.
+
+## Paths
+
+- Exclusive: `src/domain/identity/`, `src/tools/verify_domain_identities.gd`,
+  `docs/modules/domain-identities.md`, `docs/adr/0002-domain-identity-namespaces.md`
+- Shared/hotspots: `docs/ARCHITECTURE.md`, this claim
+- Generated/ignored: Godot import metadata
+
+## Contracts and data
+
+- `ContentId`: canonical lowercase UUID text persisted with schema-owned content
+- `EntityId`: positive session-local integer, never a persisted content/server identity
+- `WowGuid`: opaque high/low unsigned 32-bit words preserving wire bits
+- `ServerEntryId`: positive integer plus non-empty adapter/table namespace
+- Migration: additive types only; no existing persisted data changes
+
+## Dependencies
+
+- Requires: M01 coordinate/focus seams through `77cd17a`
+- Blocks: Content Project schemas, server adapters, network entity mapping and gameplay registry
+- External state: no dependency or proprietary input
+
+## Verification
+
+- Commands: identity contract/boundary verifier, dependency search,
+  coordination/documentation gates and headless project load
+- Fixtures: valid/invalid UUIDs, session IDs, full unsigned GUID words and
+  duplicate numeric server entries in different namespaces
+- Fidelity evidence: GUID words remain opaque and lossless until build-12340
+  packet fixtures establish semantic decomposition
+- Performance budget: constant-time scalar/string validation outside frame loops
+
+## Documentation deliverables
+
+- Inline public API docs: every value and validation/equality method
+- Module specification: persistence, ownership, namespace mapping and recovery
+- Data-flow diagram: authored/runtime/wire/server identities into adapters
+- State/sequence diagrams: lifecycle diagram for content/session/wire/server identity
+- ADR: namespace separation and UUID persistence decision
+
+## Simplicity and naming
+
+- Important names introduced: `ContentId`, `EntityId`, `WowGuid`, `ServerEntryId`
+- Simplest considered solution: four independent values with explicit fields
+- Rejected complexity/abstractions: generic ID base class, registry service,
+  UUID generator and speculative GUID high-type enum
+- Unavoidable complexity and justification: server entry namespace and split GUID
+  words prevent collisions and signed 64-bit loss
+- Measured optimization evidence: not applicable
+
+## Status
+
+- State: active
+- Done: identity semantics and package boundary selected
+- Next: implement values, verifier, ADR and module specification
+- Blocked by: