Reorganize Blender Web execution around capabilities

docs/tasks/WBV2-P0-001.md

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+# WBV2-P0-001: reconcile scope and checkpoints
+
+- task: WBV2-P0-001
+- parent: WBV2-BASELINE
+- status: in_progress
+- gap: workflow:execution-control-plane
+- ownerFamily: PROGRAM
+- targetImplementationClass: LOCAL_BOUNDED
+
+## 目标
+
+冻结 V1 与 Blender 5.2 full-parity 的业务边界，建立 capability production lane
+和 legacy coverage lane，并证明 V2 指针、legacy checkpoint 与 corrective handoff
+没有互相覆盖。
+
+## 输入与范围
+
+- `docs/BLENDER_WEB_PARITY_EXECUTION_PLAN_V2.md`
+- `docs/BLENDER_WEB_PARITY_TASK_PLAN_V2.json`
+- `docs/BLENDER_WEB_EXECUTION_CONTROL_PLANE.md`
+- `docs/EXECUTION_QUEUE.md`
+- `tests/golden/corrective/C6-003/handoff.json`
+- `docs/WEB_BLENDER_MODELER_V1_SCOPE.md`
+
+做：计划 schema、依赖图、能力分类、双 lane index、checkpoint ancestry、protected
+hash 交叉检查。保留 legacy manifest/status/corrective handoff，不重写历史证据。
+
+## 验收
+
+```bash
+node tools/web/check-web-parity-v2-plan.mjs
+node tools/web/check-corrective-plan.mjs
+node tools/web/check-context-governance.mjs
+npm --prefix web run test:execution-control-plane
+git diff --check
+```
+
+Malformed plan、重复 ready task、parent mismatch、hash drift 或缺失 task card 必须失败，
+不得推进 capability successor 或改写 legacy checkpoint。
+
+## 交付与回滚
+
+- Reports: `tests/golden/WBV2-P0-001/`
+- Status: `docs/status/WBV2-P0-001.md`
+- Manifest: `tests/golden/WBV2-P0-001/manifest.json`
+- Handoff: `node tools/web/check-task-context.mjs --task WBV2-P0-001 --write`
+- Rollback: restore `WBV2-BASELINE` as the capability queue tail; leave M16 and corrective evidence unchanged.