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

1. P0Define and measure the target performance contract

   The full, budgeted, minimum tiers have no accepted frame target. Record named device/browser/GPU, viewport, DPR, sustained CPU/GPU/presentation p50 and p95, deadline misses, memory, and settled quality. Submission time is not GPU timing.

   tiers[].frameTargetMs
2. P0Native Webgpu capability proof

   Controller must await WebGPURenderer.init() and reject a backend where isWebGPUBackend is not true; no fallback is activated.

   capabilityRequirements.native-webgpu
3. P0Single Scene Render capability proof

   Frame execution must report exactly one scene render and no duplicate diagnostic or presentation render.

   capabilityRequirements.single-scene-render
4. P0No Post Processing capability proof

   Runtime graph and frame record must report zero post-processing passes.

   capabilityRequirements.no-post-processing
5. P0Mobile Resource Accounting capability proof

   Named-device sustained evidence must report CPU/GPU/presentation timing, render items, submissions, shadow casters, materials/pipelines, and peak live bytes.

   capabilityRequirements.mobile-resource-accounting
6. P0Renderer Init runtime proof

   Await controller readiness after WebGPURenderer.init().

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

   Capture controller metrics with nativeWebGPU true.

   runtimeProof.backend-is-webgpu
8. P0Physical Routes runtime proof

   Load all 15 scenario/mechanism/tier/camera physical routes and prove each locks exactly one route dimension.

   runtimeProof.physical-routes
9. P0Mechanism Reachable runtime proof

   Load every final, blockout, hierarchy, materials, and action-ready mechanism route and bind the observed controller mode to the physical route record.

   runtimeProof.mechanism-reachable
10. P0Target Contracts runtime proof

    Capture protected node, socket, ColliderConstructionInput, destruction-group, mode, tier, and exact-reset inventories for all three targets.

    runtimeProof.target-contracts
11. P0Render Ownership runtime proof

    Capture one renderer owner, one scene render, one tone-map owner, one output-transform owner, and zero post-processing passes.

    runtimeProof.render-ownership
12. P0Aligned Readback runtime proof

    Capture the actual integer WebGPU row stride, 256-byte alignment, compact width, height, and normalized render-target pixels for every required PNG.

    runtimeProof.aligned-readback
13. P0Visual Contracts runtime proof

    Inspect final and diagnostic PNGs for each target and record AI-vision authored-contract scores; no reference-image similarity claim is permitted.

    runtimeProof.visual-contracts
14. P0Sustained Performance runtime proof

    Record named-device sustained CPU/GPU/presentation evidence and mobile resource accounting without inventing a universal frame target.

    runtimeProof.sustained-performance
15. P2Close tier-specific acceptance

    Validate and promote full, budgeted, minimum as independent visual and performance contracts without crossing their protected invariants.

    tiers[].acceptanceStatus