# WBV2-P16-002: paint_attributes_engine_receipt

- task: WBV2-P16-002
- parent: WBV2-P16-001
- status: in_progress
- gap: capability:SCULPT.PAINT_ATTRIBUTES
- ownerFamily: SCULPT
- targetImplementationClass: LOCAL_EXACT

## 目标

Bind vertex colors and weights, undo/redo, malformed rejection, and exact save/reopen to compiled WASM Main in Chromium.

## 输入与范围

- Focused source: `tests/golden/WBV2-P16-001/paint-selection-report.json`
- Production test: `web/tests/e2e/wbv2-paint-attributes-production.spec.ts`
- Production entrypoint: `npm --prefix web run test:e2e -- --workers=1 tests/e2e/wbv2-paint-attributes-production.spec.ts`

## 验收

- vertex colors and weights match bounded expectations
- undo/redo revisions are sequential
- malformed input fails closed without Main mutation
- save/reopen is exact and deterministic
- Chromium is the only browser
- `node tools/web/check-task-context.mjs --task WBV2-P16-002 --write`

## 交付与回滚

- Reports: `tests/golden/WBV2-P16-002/`
- Status: `docs/status/WBV2-P16-002.md`
- Manifest: `tests/golden/WBV2-P16-002/manifest.json`
- Rollback: restore P16-001 as queue parent.