## 1. Specification
- [x] 1.1 Add proposal, design notes, and spec deltas for the VideoAgent clip workbench migration.

## 2. Local Runtime
- [x] 2.1 Add `videoagent-local` readiness, package status, and start/stop runtime management to the local API.
- [x] 2.2 Add `/local-api/videoagent/tasks` task creation, polling, and structured result payloads.
- [x] 2.3 Write VideoAgent task deliverables back to the unified task stream and generated asset list.

## 3. Workbench UI
- [x] 3.1 Refactor the clip page from FunClip-first naming/copy to AI clip workbench / VideoAgent-backed behavior.
- [x] 3.2 Replace the fixed 12-card first step with source + natural-language goal + scene/output package configuration.
- [x] 3.3 Add generated plan, transcript, candidate segments, deliverables, and result preview surfaces.
- [x] 3.4 Keep service status and task history in dialogs with customer-facing copy only.
- [x] 3.5 Simplify the first screen into a prompt-led left panel and a right-side video monitor with only asset-center and local-upload entry points before media is selected.
- [x] 3.6 Replace visible legacy template selection with quick scenarios that fill the prompt and configure output options.
- [x] 3.7 Reuse the shared asset center modal for clip source selection, including multi-select where the workflow supports it.
- [x] 3.8 Add workflow-aware source modes for single primary video/audio, primary plus reference media, multi-source montage, script-to-video, and batch processing.
- [x] 3.9 Align first-screen form controls and source tray with the `/image` golden page form standard.
- [x] 3.10 Hide unsupported advanced demo abilities from the first-screen quick scenarios and show only current MVP workflows.
- [x] 3.11 Replace broad legacy output toggles with scenario-specific output options.

## 4. Runtime And Assets
- [x] 4.1 Stop creating asset-center output assets when the adapter only returns structured plans or JSON files.
- [x] 4.2 Allow runtime-generated assets to be deleted from the local API and asset center.
- [x] 4.3 Map VideoAgent model needs to reusable TrueGrowth model-center capability packs and optional advanced packs.

## 5. Verification
- [ ] 5.1 Validate the OpenSpec change. (`openspec` / `pnpm exec openspec` not available in this environment.)
- [x] 5.2 Run focused TypeScript or app checks.
- [x] 5.3 Run a local API smoke check for status and task creation.
- [x] 5.4 Browser-check the simplified `/timeline` first screen, source picker, upload affordance, quick scenario behavior, and dark/light styling.