docs(M02): publish terrain query handoff

Work-Package: M02-GMP-TERRAIN-QUERY-001
Agent: sindo-main-codex
Tests: coordination and documentation gates; diff check
Fidelity: documents inherited height/snap regression and remaining collision evidence gap

coordination/claims/M02-GMP-TERRAIN-QUERY-001.md

@@ -1,6 +1,7 @@
 # M02-GMP-TERRAIN-QUERY-001 — Player terrain query boundary
 
 <!-- OPENWC_CLAIM:M02-GMP-TERRAIN-QUERY-001:sindo-main-codex:2026-07-16 -->
+<!-- OPENWC_HANDOFF:READY:M02-GMP-TERRAIN-QUERY-001:a45d521 -->
 
 ## Ownership
 
@@ -78,7 +79,40 @@ changing current spawn/ground-snap behavior.
 
 ## Status
 
-- State: active
-- Done: claim and isolated worktree from updated master
-- Next: implement contract/adapter, migrate player, test and document
+- State: ready-for-review
+- Done: typed query/sample contract, cached ADT adapter, player migration,
+  synthetic interpolation/cache/failure tests, injected scene regression and documentation
+- Next: M02 integrator reviews and merges before camera-rig extraction
 - Blocked by:
+
+## Handoff
+
+- Commit: `a45d521`
+- Branch: `work/sindo-main-codex/m02-terrain-query`
+- Outcome: `ThirdPersonWowController` no longer loads ADTs, caches tile
+  dictionaries, selects chunks or interpolates height grids. It consumes a
+  replaceable typed `TerrainQuery` and retains only existing offset/snap policy.
+- Public contracts: additive immutable `TerrainGroundSample`, replaceable
+  `TerrainQuery`, cached `AdtTerrainQuery` and player `set_terrain_query`.
+  Coordinate contract version, ADT/native format and renderer caches are unchanged.
+- Verification: `TERRAIN_QUERY PASS contract=4 interpolation=1 cache=1
+  failures=2 player_injection=1`; player-input and local-movement regressions
+  passed; asset-free scene exited `0`; coordinate boundary passed with five
+  required consumers and StreamingFocus passed; renderer dry-run passed eight
+  pre-capture gates and seven checkpoint plans; coordination/documentation/diff gates passed.
+- Fidelity: synthetic fractional-grid fixture locks the inherited 145-height
+  outer-grid bilinear result within `0.002` Godot units; injected scene locks
+  spawn offset `0.05` and physics snap. This is sandbox-regression evidence,
+  not build-12340 triangle/hole/collision parity.
+- Local verification inputs: isolated worktree reused the existing ignored
+  native DLL and generated ADT resource scripts. Proprietary extracted data and
+  character GLB were absent, so renderer dry-run logged expected missing-corpus
+  diagnostics while all contract steps returned success.
+- Rebuild/migration: none; caches are transient and existing formats remain unchanged.
+- Remaining risks: first ADT parse remains synchronous as before; unavailable
+  tiles cache until query replacement; player still owns snap policy; exact
+  ADT triangle choice, holes, slopes, liquids and collision remain open.
+- Documentation: inline public APIs plus `docs/modules/terrain-query.md` with
+  inputs/outputs, data-flow, cache state and cross-boundary sequence diagrams,
+  ownership, failure/recovery, capability status and source map. Coordinate and
+  movement consumer specifications were updated.