Native WebGPU Cached Clipmap Shadow Lab

Declared evidence work remains. Overall implementation status does not establish individual runtime or performance claims.

1. P0Native Webgpu capability proof

   Capture current-source evidence for the declared native webgpu gate.

   capabilityRequirements.native-webgpu
2. P0Comparison Depth Textures capability proof

   Capture current-source evidence for the declared comparison depth textures gate.

   capabilityRequirements.comparison-depth-textures
3. P0Renderer Init runtime proof

   Capture current-source evidence for the declared renderer init gate.

   runtimeProof.renderer-init
4. P0Backend Is Webgpu runtime proof

   Capture current-source evidence for the declared backend is webgpu gate.

   runtimeProof.backend-is-webgpu
5. P0Mechanism Reachable runtime proof

   Capture current-source evidence for the declared mechanism reachable gate.

   runtimeProof.mechanism-reachable
6. P0Aligned Readback runtime proof

   Capture current-source evidence for the declared aligned readback gate.

   runtimeProof.aligned-readback
7. P0Receiver Consumes Committed Levels runtime proof

   Capture current-source evidence for the declared receiver consumes committed levels gate.

   runtimeProof.receiver-consumes-committed-levels
8. P0Actual Depth Resource Readback runtime proof

   Capture current-source evidence for the declared actual depth resource readback gate.

   runtimeProof.actual-depth-resource-readback
9. P0Sequential Child Shadow Submissions runtime proof

   Capture current-source evidence for the declared sequential child shadow submissions gate.

   runtimeProof.sequential-child-shadow-submissions
10. P0Scheduler Fairness runtime proof

    Capture current-source evidence for the declared scheduler fairness gate.

    runtimeProof.scheduler-fairness
11. P0Caster Visible Shadow Parity runtime proof

    Capture current-source evidence for the declared caster visible shadow parity gate.

    runtimeProof.caster-visible-shadow-parity
12. P1Capture a current-source evidence bundle

    Publish source-hash-bound renderer/backend facts, required diagnostic images, aligned readbacks, resource inventory, timing method, and limitations; directly inspect the important artifacts before promotion.

    evidenceBundle
13. P2Close tier-specific acceptance

    Validate and promote high, ultra, reduced as independent visual and performance contracts without crossing their protected invariants.

    tiers[].acceptanceStatus