rnd(M02): extract third-person camera rig

Work-Package: M02-RND-CAMERA-001

coordination/claims/M02-RND-CAMERA-001.md

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+# M02-RND-CAMERA-001 — Third-person camera rig boundary
+
+<!-- OPENWC_CLAIM:M02-RND-CAMERA-001:sindo-main-codex:2026-07-16 -->
+
+## Ownership
+
+- Target: M02
+- Program: RND/GMP
+- Owner/Agent ID: sindo-main-codex
+- Branch: `work/sindo-main-codex/m02-camera-rig`
+- Lease expires UTC: 2026-07-16
+- Integrator: M02 milestone integrator
+
+## Outcome
+
+Move mouse capture, orbit yaw/pitch, zoom state and Camera3D transforms from
+`ThirdPersonWowController` into a reusable `ThirdPersonCameraRig`, with an
+explicit replaceable camera-collision policy that preserves the current
+no-collision sandbox baseline.
+
+## Non-goals
+
+- Enable a new collision/raycast behavior before build-12340 comparison.
+- Change initial yaw/pitch, zoom limits, sensitivity, FOV, far plane or camera path.
+- Implement first-person, follow lag, shoulder offsets or cinematic cameras.
+- Change movement, terrain query, character presentation or renderer streaming focus.
+- Mark M02 complete or edit its checklist/Evidence.
+
+## Paths
+
+- Exclusive: `src/scenes/player/third_person_camera_rig.gd`,
+  `src/scenes/player/camera_collision_policy.gd`,
+  `src/scenes/player/no_camera_collision_policy.gd`,
+  `src/tools/verify_third_person_camera_rig.gd`,
+  `docs/modules/third-person-camera.md`, this claim
+- Shared/hotspots: `src/scenes/player/third_person_wow_controller.gd`,
+  runtime streaming scenes, player regression scene,
+  `src/tools/verify_player_input.gd`, `docs/modules/player-input.md`,
+  `docs/modules/local-player-movement.md`, `docs/modules/README.md`
+- Generated/ignored: local `.godot`, native DLL, generated resources and renderer corpus
+
+## Contracts and data
+
+- Public API: `ThirdPersonCameraRig.initialize_for_character`,
+  `handle_camera_input`, `godot_world_flight_movement_basis`, state getters and
+  `set_collision_policy`
+- Policy: `CameraCollisionPolicy.resolve_camera_distance`; default
+  `NoCameraCollisionPolicy` returns requested distance unchanged
+- Scene paths and renderer camera path remain unchanged
+- Schema/cache/coordinate contracts: unchanged
+- Consumers: player composition, sandbox flight movement and renderer viewport
+
+## Dependencies
+
+- Requires: merged TerrainQuery package on master `f5bb64e`
+- Blocks: character appearance/animation extraction from remaining player hotspot
+- External state: none; tests use asset-free camera/player scene
+
+## Verification
+
+- Commands: dedicated orbit/zoom/clamp/policy verifier, input/movement/terrain
+  regressions, asset-free scene, coordinate/StreamingFocus gates, renderer dry-run
+  and repository gates
+- Fixtures: initial state, remappable action events, mouse deltas and fixed-distance policy
+- Fidelity evidence: preserve current `-18°` pitch, `8` distance, `1` zoom step,
+  `2..18` clamp, `0.003` sensitivity and no-collision output
+- Performance budget: constant-time state/transform update; no raycast in baseline policy
+
+## Documentation deliverables
+
+- Inline API/export documentation for rig and collision policies
+- Camera module spec with inputs/outputs, data-flow, state and sequence diagrams
+- Updated input/movement consumer diagrams/source maps and module registry
+
+## Simplicity and naming
+
+- Important names: `ThirdPersonCameraRig`, `CameraCollisionPolicy`,
+  `NoCameraCollisionPolicy`
+- Simplest approach: one Node3D rig on existing CameraPivot and one explicit identity policy
+- Rejected complexity: generic camera framework, spring arm migration and hidden physics raycast
+- Unavoidable complexity: rig mutates Camera3D/character Node transforms on main thread
+- Measured optimization evidence: not applicable
+
+## Status
+
+- State: active
+- Done: claim and isolated worktree from updated master
+- Next: implement rig/policy, migrate scenes/player, test and document
+- Blocked by:
+