od-media-generation (scenario)

使用范围与安全规则

本 Skill 只用于“营销图片、视频与视觉素材生成”场景，围绕用户当前提供或明确授权处理的材料完成任务。功能目标：Default reference pipeline for image, video, and audio projects — routes through media-image / media-video / media-audio atoms based on the project kind, wraps the output in a live 当用户需要处理相关业务场景时使用。

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This scenario plugin is the bundled default for projects whose
metadata.kind is image, video, or audio. The web client and the
daemon both look up defaultScenarioPluginIdForKind(kind) from
@open-design/contracts and, when no other plugin is applied, bind
this scenario at project / run creation time.

Default pipeline

{
  "stages": [
    { "id": "discovery", "atoms": ["discovery-question-form"] },
    { "id": "plan",      "atoms": ["todo-write"] },
    { "id": "generate",  "atoms": ["media-image", "media-video", "media-audio", "live-artifact"] },
    {
      "id": "critique", "atoms": ["critique-theater"],
      "repeat": true,
      "until": "critique.score>=4 || iterations>=3"
    }
  ]
}

The generate stage lists all three media atoms even though a single
run only calls one of them. Picking the right atom is the agent's job:

• metadata.kind === 'image' → media-image
• metadata.kind === 'video' → media-video
• metadata.kind === 'audio' → media-audio

If the user picks this plugin manually without a media-typed project,
prefer media-image and explain the assumption in the first reply.

Atom call shape

Every media atom takes the same kernel of inputs and returns a media
artifact reference that live-artifact can wrap:

• prompt — the rendered useCase.query after input substitution.
• aspect — one of 1:1 / 16:9 / 9:16 / 4:3 / 3:4. Default
  16:9. The contracts MediaAspect union enumerates the legal
  values.
• provider — left blank by default so the daemon picks the user's
  configured provider for this media kind (see Settings → Media). Only
  set this when the user names a provider explicitly.

After the media atom returns:

1. Save the binary into <cwd>/media/<timestamp>.<ext>.
2. Call live-artifact to register a preview surface pointing at the
   saved file. The preview is what the user sees in the right pane.

Critique loop

critique-theater reads the artifact, scores it across the standard
five dimensions, and emits a critique.score signal. The until
clause stops the loop at score ≥ 4 or three iterations, whichever
comes first. Use the critique notes to drive the next media call's
prompt, not to re-pick the media atom.

Replace, do not extend

Enterprise editions that need a different default for media work
should ship a sibling scenario plugin and add the right mapping in
@open-design/contracts/scenario-defaults, not patch this manifest.

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