docs(M01): mark coordinate contract handoff ready

Work-Package: M01-FND-COORDS-001
Agent: sindo-main-codex
Tests: coordination and documentation gates passed
Fidelity: handoff records five build 12340 golden coordinate points

coordination/claims/M01-FND-COORDS-001.md

@@ -1,6 +1,7 @@
 # M01-FND-COORDS-001 — Canonical coordinate contracts
 
 <!-- OPENWC_CLAIM:M01-FND-COORDS-001:sindo-main-codex:2026-07-15 -->
+<!-- OPENWC_HANDOFF:READY:M01-FND-COORDS-001:f45695c -->
 
 ## Ownership
 
@@ -78,8 +79,33 @@ ADT tile/chunk/local and Godot world coordinate spaces, plus the single pure
 
 ## Status
 
-- State: active
-- Done: repository/reference audit and contract scope
-- Next: ADR, fixtures, value objects and mapper implementation
+- State: ready-for-review
+- Done: repository/reference audit, ADR, immutable value objects, pure mapper,
+  build 12340/boundary/yaw fixtures, module specification and repository gates
+- Next: integrator review and merge before renderer/native consumer migration
 - Blocked by:
 
+## Handoff
+
+- Commit: `f45695c`
+- Branch: `work/sindo-main-codex/m01-coordinate-mapper`
+- Outcome: additive contract for canonical/server/ADT/Godot positions, ADT
+  tile/chunk/local ownership and world-facing yaw; no existing consumer changed
+- Public contracts: contract version 1 documented in
+  `docs/modules/coordinate-mapping.md`; no persisted schema or cache change
+- Verification: coordinate mapper PASS (5 golden points, 8 tile boundaries,
+  5 yaw cases); M00 coordinate calibration PASS (5 points, maximum error
+  `0.000015`); renderer manifest, coordination, documentation, dependency and
+  whitespace checks passed; headless project load completed with expected
+  missing proprietary-data diagnostics in the isolated worktree
+- Fidelity: observed build 12340 positions match within `0.002` yard; formulas
+  cross-checked against TrinityCore, OpenRealm and WoWee; visual parity is not claimed
+- Migration/rebuild: none for this additive package; consumers migrate only
+  after merge and must preserve renderer checkpoints
+- Remaining risks: native loaders and renderer still use manual conversions;
+  MDDF/MODF Euler mapping is intentionally unresolved; server-spawn integration
+  and finite-value adapter validation remain later M01 packages
+- Recommended merge order: this contract first, coordinate fixtures/server-spawn
+  audit second, renderer/native consumers third, manual-conversion search gate last
+- Documentation: ADR 0001; coordinate-mapping module spec with data-flow and
+  dependency diagrams; inline API documentation on all public symbols