test(M00): add renderer coordinate calibration

Work-Package: M00-QAR-COORD-CALIBRATION-001
Agent: sindo-main-codex
Tests: coordinate probe, M00 dry-run, coordination and documentation gates
Fidelity: five build 12340 camera points round-trip within 0.000015 units

coordination/claims/M00-QAR-COORD-CALIBRATION-001.md

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+# M00-QAR-COORD-CALIBRATION-001 — Renderer coordinate calibration
+
+<!-- OPENWC_CLAIM:M00-QAR-COORD-CALIBRATION-001:sindo-main-codex:2026-07-13 -->
+
+## Ownership
+
+- Target: M00
+- Program: QAR
+- Owner/Agent ID: sindo-main-codex
+- Branch: `work/sindo-main-codex/m00-coordinate-calibration`
+- Lease expires UTC: 2026-07-13
+- Integrator: milestone integrator
+
+## Outcome
+
+Record the five observed build 12340 camera positions as non-proprietary golden coordinates and determine whether the existing WoW/Godot position formula round-trips them.
+
+## Non-goals
+
+- Introducing the M01 production `CoordinateMapper` contract.
+- Changing terrain, placement, WMO, liquid, or streaming behavior.
+- Claiming camera composition parity from coordinate round-trip alone.
+
+## Paths
+
+- Exclusive: `src/tools/verify_render_coordinate_calibration.gd`
+- Shared/hotspots: `src/tools/render_baseline_manifest.json`, renderer baseline documentation
+- Generated/ignored: original-client screenshots and local reports
+
+## Contracts and data
+
+- Public API/events: none; headless diagnostic only
+- Schema/format version: additive checkpoint calibration metadata, manifest schema remains 1
+- Migration/compatibility: existing capture consumers ignore additive fields
+- Consumers: M00 fidelity workflow and future M01 golden fixtures
+
+## Dependencies
+
+- Requires: five accepted original-client build 12340 viewpoints
+- Blocks: diagnosis of paired camera/placement mismatch
+- External state: screenshots remain outside Git
+
+## Verification
+
+- Commands: coordinate calibration probe, baseline manifest, coordination and documentation gates
+- Fixtures: five `reference_wow_camera` values in renderer manifest
+- Fidelity evidence: positions were observed in build 12340 during the paired session
+- Performance budget: negligible headless arithmetic
+
+## Documentation deliverables
+
+- Inline public API docs: diagnostic script header
+- Module specification: renderer verification/source map update
+- Data-flow diagram: baseline calibration flow update
+- Sequence/state/dependency diagrams: not applicable; stateless synchronous probe
+- Source map/status updates: renderer module and baseline document
+
+## Simplicity and naming
+
+- Important names introduced: `reference_wow_camera`, `maximum_round_trip_error`
+- Simplest considered solution: direct formula probe over manifest fixtures
+- Rejected complexity/abstractions: production domain mapper before M01
+- Unavoidable complexity and justification: none
+- Measured optimization evidence: not applicable
+
+## Status
+
+- State: ready
+- Done: five golden camera points, headless round-trip probe, runner integration and documentation
+- Next: integrator review; diagnose terrain height/placement/composition separately
+- Blocked by:
+
+## Handoff
+
+- Commit: branch HEAD
+- Results: five points passed with maximum mapping/round-trip error 0.000015
+- Remaining risks: correct position arithmetic does not prove terrain height, placement or camera direction parity
+- Documentation updated: `docs/RENDER_BASELINE.md`, `docs/modules/world-renderer.md`