# WBV2-P25-003: implement_mesh_authoring_surface

- task: WBV2-P25-003
- parent: WBV2-P25-002
- status: in_progress
- gap: MESH.AUTHORING
- ownerFamily: MESH
- targetImplementationClass: SOURCE_BACKED

## 目标

Wire mesh authoring, UV, materials, vertex color and weight commands through the existing source-backed path.

## 输入与范围

- Focused source: `blender-5.2.0/source/blender/web_engine/web_engine_api.cpp`
- Focused source: `web/protocol/web-engine.ts`
- Implementation entrypoint: `node tools/web/generate-wbv2-implementation-slice.mjs --task WBV2-P25-003 --write`

## 验收

- real source or WebEngine Main implementation is present and connected
- worker/client/frontend route uses the typed protocol without a duplicate shim
- malformed or unsupported input fails closed without claiming parity
- implementation smoke is reproducible; detailed Chromium receipt, undo/redo, save/reopen and deterministic verification remain deferred
- `node tools/web/check-task-context.mjs --task WBV2-P25-003 --write`

## 交付与回滚

- Reports: `tests/golden/WBV2-P25-003/`
- Status: `docs/status/WBV2-P25-003.md`
- Manifest: `tests/golden/WBV2-P25-003/manifest.json`
- Rollback: restore WBV2-P25-002 as queue parent and leave the implementation slice in_progress.