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+# M01-FND-COORDS-001 — Canonical coordinate contracts
+
+<!-- OPENWC_CLAIM:M01-FND-COORDS-001:sindo-main-codex:2026-07-15 -->
+
+## Ownership
+
+- Target: M01
+- Program: FND
+- Owner/Agent ID: sindo-main-codex
+- Branch: `work/sindo-main-codex/m01-coordinate-mapper`
+- Lease expires UTC: 2026-07-15
+- Integrator: M01 milestone integrator
+
+## Outcome
+
+Introduce scene-free value objects for canonical WoW, server, ADT placement,
+ADT tile/chunk/local and Godot world coordinate spaces, plus the single pure
+`CoordinateMapper` contract for position and world-yaw conversions.
+
+## Non-goals
+
+- Migrating `StreamingWorldLoader`, native parsers, sky, player or renderer code.
+- Defining model-specific MDDF/MODF Euler rotation corrections.
+- Introducing `StreamingFocus`, typed IDs or a test framework dependency.
+- Claiming visual parity from arithmetic round trips.
+
+## Paths
+
+- Exclusive: `src/domain/coordinates/**`, `src/tools/verify_coordinate_mapper.gd`,
+  `docs/modules/coordinate-mapping.md`, `docs/adr/0001-canonical-world-coordinates.md`
+- Shared/hotspots: `docs/modules/README.md`, this claim
+- Generated/ignored: Godot import metadata and local test output
+
+## Contracts and data
+
+- Public API/events: immutable coordinate value objects and pure mapper methods
+- Schema/format version: no persisted format; contract version 1 in module docs
+- Migration/compatibility: additive contract; existing renderer conversions remain
+  unchanged until a later consumer migration package
+- Consumers: future renderer, network, gameplay and server-data adapters
+- Rollout order: contract and fixtures first, then native/parser and renderer consumers
+
+## Dependencies
+
+- Requires: merged M00 build 12340 coordinate calibration evidence
+- Blocks: M01 renderer coordinate migration and `StreamingFocus`
+- External state: no proprietary inputs; reference formulas are source-only evidence
+
+## Verification
+
+- Commands: headless coordinate contract probe, headless project load,
+  coordination and documentation gates
+- Fixtures: five build 12340 camera points, ADT map center/edge/boundary points,
+  server/ADT/Godot round trips and yaw normalization cases
+- Fidelity evidence: M00 observed build 12340 positions plus independent
+  OpenRealm/WoWee and TrinityCore grid formulas
+- Performance budget: constant-time scalar arithmetic with no allocation beyond result values
+
+## Documentation deliverables
+
+- Inline public API docs: every public value object and mapper method
+- Module specification: purpose, public API, inputs/outputs, ownership, errors and source map
+- Data-flow diagram: server/ADT/canonical/Godot mappings
+- Dependency diagram: canonical contract consumers and forbidden scene dependency
+- Sequence/state diagrams: not applicable; mapper is synchronous and stateless
+- ADR: coordinate axes, units, tile indexing and compatibility rollout
+
+## Simplicity and naming
+
+- Important names introduced: `CanonicalWowWorldPosition`, `ServerWorldPosition`,
+  `AdtPlacementPosition`, `AdtTileCoordinate`, `AdtChunkCoordinate`,
+  `AdtTileLocalPosition`, `GodotWorldPosition`, `WorldYaw`, `CoordinateMapper`
+- Simplest considered solution: scalar immutable value objects and one pure mapper
+- Rejected complexity/abstractions: generic vector-space framework, matrices,
+  dependency injection and a third-party test framework
+- Unavoidable complexity and justification: distinct source spaces prevent silent axis swaps
+- Measured optimization evidence: not applicable
+
+## Status
+
+- State: active
+- Done: repository/reference audit and contract scope
+- Next: ADR, fixtures, value objects and mapper implementation
+- Blocked by:
+