# WBV2-P1123-000: GLB roundtrip dependency repair

- task: `WBV2-P1123-000`
- parent: `WBV2-P1122-000`
- status: `in_progress`
- gap: `workflow:module_glb_roundtrip_repair`
- ownerFamily: `MEDIA`
- targetImplementationClass: `LOCAL_EXACT`

## 目标

修复 standalone GLB checker 的 `nonmesh-export`/`nonmesh-binary` 转译依赖，并验证 mesh、non-mesh、Chromium negative/recovery roundtrip。

## 输入与范围

- Checker: `tools/web/check-glb-blender-roundtrip.mjs`, `tools/web/check-nonmesh-glb-blender-roundtrip.mjs`, `tools/web/blender-check-glb-roundtrip.py`
- Protocol: `web/protocol/glb-export.ts`, `web/protocol/glb-import.ts`, `web/protocol/nonmesh-export.ts`, `web/protocol/nonmesh-binary.ts`
- Runtime: `web/app/src/engine-client/WebEngineClient.ts`, `web/app/src/workers/web-engine.worker.ts`, `web/app/src/app/App.tsx`

## 验收

```bash
npm --prefix web run test:glb-blender-roundtrip
npm --prefix web run test:nonmesh-glb-blender-roundtrip
npm --prefix web run test:e2e -- --workers=1 tests/e2e/glb-negative-cases.spec.ts tests/e2e/glb-recovery.spec.ts tests/e2e/glb-main-persistence.spec.ts
npm --prefix web run typecheck
```

必须记录 mesh/material/skin/animation 与 non-mesh roundtrip 正例、sparse/oversized/external URI/extension 负例、cancel/Worker restart/OPFS quota recovery 和 Chromium save/reopen。历史 GLB checker hash drift 单独进入 P1124。

## 交付与回滚

- Receipt: `tests/golden/WBV2-P1123-000/module-receipt.json`
- Manifest: `tests/golden/WBV2-P1123-000/manifest.json`
- Status: `docs/status/WBV2-P1123-000.md`
- 回滚：恢复 P1122 manifest 为 queue parent。