# WBV2-P12-004: viewport and non-mesh engine receipt

- task: WBV2-P12-004
- parent: WBV2-P12-003
- status: in_progress
- gap: workflow:viewport_nonmesh_engine_receipt
- ownerFamily: VIEWPORT
- targetImplementationClass: LOCAL_BOUNDED

## 目标

Bind viewport SceneIR and bounded non-mesh read/edit paths to the compiled WebEngine runtime with explicit unsupported boundaries.

## 输入与范围

- Viewport report: `tests/golden/WBV2-P2-004/viewport-report.json`
- Non-mesh report: `tests/golden/WBV2-P4-003/sculpt-report.json`
- WebEngine client: `web/app/src/engine-client/WebEngineClient.ts`

## 验收

- `npm --prefix web run test:e2e -- --workers=1 tests/e2e/wbv2-viewport-nonmesh-production.spec.ts`
- `node tools/web/generate-wbv2-viewport-nonmesh-receipt.mjs --write`
- `node tools/web/check-task-context.mjs --task WBV2-P12-004 --write`

Unsupported data, malformed geometry, budget overflow, device loss, non-Chromium, or non-exact save/reopen cases must keep in_progress and must not advance nextTask.

## 交付与回滚

- Reports: `tests/golden/WBV2-P12-004/`
- Status: `docs/status/WBV2-P12-004.md`
- Manifest: `tests/golden/WBV2-P12-004/manifest.json`
- Rollback: restore P12-003 as queue parent.