{
  "$comment": "编辑器命令黄金文件（Runbook M2.1 / 方案 §7.1）：命令序列 → 期望状态快照。修改命令语义必须同步更新此夹具，防止 reducer 漂移。",
  "base": {
    "version": 2,
    "tracks": [
      { "id": "video-1", "kind": "video", "label": "视频 1", "order": 0 },
      { "id": "audio-1", "kind": "audio", "label": "音频 1", "order": 1 },
      { "id": "subtitle-1", "kind": "subtitle", "label": "字幕 1", "order": 2 },
      { "id": "video-2", "kind": "video", "label": "视频 2", "order": 3 }
    ],
    "clips": [
      { "id": "clip-a", "kind": "video", "nodeId": "node-a", "trackId": "video-1", "startMs": 0, "durationMs": 5000, "sourceStartMs": 0, "sourceDurationMs": 10000, "volume": 1, "fadeInMs": 0, "fadeOutMs": 0 },
      { "id": "clip-b", "kind": "video", "nodeId": "node-b", "trackId": "video-1", "startMs": 5000, "durationMs": 3000, "sourceStartMs": 2000, "sourceDurationMs": 8000 },
      { "id": "clip-c", "kind": "audio", "nodeId": "node-audio", "trackId": "audio-1", "startMs": 1000, "durationMs": 4000, "sourceStartMs": 0, "sourceDurationMs": 4000, "volume": 0.8 },
      { "id": "sub-1", "kind": "subtitle", "nodeId": "node-a", "trackId": "subtitle-1", "startMs": 500, "durationMs": 2000, "subtitleEntryIndex": 0, "text": "你好，影策" }
    ],
    "durationMs": 8000
  },
  "cases": [
    {
      "name": "add-clip-appends-and-recomputes-duration",
      "commands": [
        { "op": "addClip", "payload": { "clip": { "id": "clip-d", "kind": "video", "nodeId": "node-d", "trackId": "video-1", "startMs": 8000, "durationMs": 2000, "sourceStartMs": 0, "sourceDurationMs": 2000 } } }
      ],
      "expected": {
        "version": 2,
        "tracks": [
          { "id": "video-1", "kind": "video", "label": "视频 1", "order": 0 },
          { "id": "audio-1", "kind": "audio", "label": "音频 1", "order": 1 },
          { "id": "subtitle-1", "kind": "subtitle", "label": "字幕 1", "order": 2 },
          { "id": "video-2", "kind": "video", "label": "视频 2", "order": 3 }
        ],
        "clips": [
          { "id": "clip-a", "kind": "video", "nodeId": "node-a", "trackId": "video-1", "startMs": 0, "durationMs": 5000, "sourceStartMs": 0, "sourceDurationMs": 10000, "volume": 1, "fadeInMs": 0, "fadeOutMs": 0 },
          { "id": "clip-b", "kind": "video", "nodeId": "node-b", "trackId": "video-1", "startMs": 5000, "durationMs": 3000, "sourceStartMs": 2000, "sourceDurationMs": 8000 },
          { "id": "clip-c", "kind": "audio", "nodeId": "node-audio", "trackId": "audio-1", "startMs": 1000, "durationMs": 4000, "sourceStartMs": 0, "sourceDurationMs": 4000, "volume": 0.8 },
          { "id": "sub-1", "kind": "subtitle", "nodeId": "node-a", "trackId": "subtitle-1", "startMs": 500, "durationMs": 2000, "subtitleEntryIndex": 0, "text": "你好，影策" },
          { "id": "clip-d", "kind": "video", "nodeId": "node-d", "trackId": "video-1", "startMs": 8000, "durationMs": 2000, "sourceStartMs": 0, "sourceDurationMs": 2000 }
        ],
        "durationMs": 10000
      }
    },
    {
      "name": "move-clip-keeps-duration",
      "commands": [
        { "op": "moveClip", "payload": { "id": "clip-a", "startMs": 2000 } }
      ],
      "expected": {
        "version": 2,
        "tracks": [
          { "id": "video-1", "kind": "video", "label": "视频 1", "order": 0 },
          { "id": "audio-1", "kind": "audio", "label": "音频 1", "order": 1 },
          { "id": "subtitle-1", "kind": "subtitle", "label": "字幕 1", "order": 2 },
          { "id": "video-2", "kind": "video", "label": "视频 2", "order": 3 }
        ],
        "clips": [
          { "id": "clip-a", "kind": "video", "nodeId": "node-a", "trackId": "video-1", "startMs": 2000, "durationMs": 5000, "sourceStartMs": 0, "sourceDurationMs": 10000, "volume": 1, "fadeInMs": 0, "fadeOutMs": 0 },
          { "id": "clip-b", "kind": "video", "nodeId": "node-b", "trackId": "video-1", "startMs": 5000, "durationMs": 3000, "sourceStartMs": 2000, "sourceDurationMs": 8000 },
          { "id": "clip-c", "kind": "audio", "nodeId": "node-audio", "trackId": "audio-1", "startMs": 1000, "durationMs": 4000, "sourceStartMs": 0, "sourceDurationMs": 4000, "volume": 0.8 },
          { "id": "sub-1", "kind": "subtitle", "nodeId": "node-a", "trackId": "subtitle-1", "startMs": 500, "durationMs": 2000, "subtitleEntryIndex": 0, "text": "你好，影策" }
        ],
        "durationMs": 8000
      }
    },
    {
      "name": "move-clip-across-tracks",
      "commands": [
        { "op": "moveClip", "payload": { "id": "clip-b", "startMs": 3000, "trackId": "video-2" } }
      ],
      "expected": {
        "version": 2,
        "tracks": [
          { "id": "video-1", "kind": "video", "label": "视频 1", "order": 0 },
          { "id": "audio-1", "kind": "audio", "label": "音频 1", "order": 1 },
          { "id": "subtitle-1", "kind": "subtitle", "label": "字幕 1", "order": 2 },
          { "id": "video-2", "kind": "video", "label": "视频 2", "order": 3 }
        ],
        "clips": [
          { "id": "clip-a", "kind": "video", "nodeId": "node-a", "trackId": "video-1", "startMs": 0, "durationMs": 5000, "sourceStartMs": 0, "sourceDurationMs": 10000, "volume": 1, "fadeInMs": 0, "fadeOutMs": 0 },
          { "id": "clip-b", "kind": "video", "nodeId": "node-b", "trackId": "video-2", "startMs": 3000, "durationMs": 3000, "sourceStartMs": 2000, "sourceDurationMs": 8000 },
          { "id": "clip-c", "kind": "audio", "nodeId": "node-audio", "trackId": "audio-1", "startMs": 1000, "durationMs": 4000, "sourceStartMs": 0, "sourceDurationMs": 4000, "volume": 0.8 },
          { "id": "sub-1", "kind": "subtitle", "nodeId": "node-a", "trackId": "subtitle-1", "startMs": 500, "durationMs": 2000, "subtitleEntryIndex": 0, "text": "你好，影策" }
        ],
        "durationMs": 6000
      }
    },
    {
      "name": "trim-clip-duration-within-source",
      "commands": [
        { "op": "trimClip", "payload": { "id": "clip-b", "durationMs": 2000 } }
      ],
      "expected": {
        "version": 2,
        "tracks": [
          { "id": "video-1", "kind": "video", "label": "视频 1", "order": 0 },
          { "id": "audio-1", "kind": "audio", "label": "音频 1", "order": 1 },
          { "id": "subtitle-1", "kind": "subtitle", "label": "字幕 1", "order": 2 },
          { "id": "video-2", "kind": "video", "label": "视频 2", "order": 3 }
        ],
        "clips": [
          { "id": "clip-a", "kind": "video", "nodeId": "node-a", "trackId": "video-1", "startMs": 0, "durationMs": 5000, "sourceStartMs": 0, "sourceDurationMs": 10000, "volume": 1, "fadeInMs": 0, "fadeOutMs": 0 },
          { "id": "clip-b", "kind": "video", "nodeId": "node-b", "trackId": "video-1", "startMs": 5000, "durationMs": 2000, "sourceStartMs": 2000, "sourceDurationMs": 8000 },
          { "id": "clip-c", "kind": "audio", "nodeId": "node-audio", "trackId": "audio-1", "startMs": 1000, "durationMs": 4000, "sourceStartMs": 0, "sourceDurationMs": 4000, "volume": 0.8 },
          { "id": "sub-1", "kind": "subtitle", "nodeId": "node-a", "trackId": "subtitle-1", "startMs": 500, "durationMs": 2000, "subtitleEntryIndex": 0, "text": "你好，影策" }
        ],
        "durationMs": 7000
      }
    },
    {
      "name": "trim-clip-start-and-source",
      "commands": [
        { "op": "trimClip", "payload": { "id": "clip-b", "startMs": 5500, "durationMs": 2000, "sourceStartMs": 3000 } }
      ],
      "expected": {
        "version": 2,
        "tracks": [
          { "id": "video-1", "kind": "video", "label": "视频 1", "order": 0 },
          { "id": "audio-1", "kind": "audio", "label": "音频 1", "order": 1 },
          { "id": "subtitle-1", "kind": "subtitle", "label": "字幕 1", "order": 2 },
          { "id": "video-2", "kind": "video", "label": "视频 2", "order": 3 }
        ],
        "clips": [
          { "id": "clip-a", "kind": "video", "nodeId": "node-a", "trackId": "video-1", "startMs": 0, "durationMs": 5000, "sourceStartMs": 0, "sourceDurationMs": 10000, "volume": 1, "fadeInMs": 0, "fadeOutMs": 0 },
          { "id": "clip-b", "kind": "video", "nodeId": "node-b", "trackId": "video-1", "startMs": 5500, "durationMs": 2000, "sourceStartMs": 3000, "sourceDurationMs": 8000 },
          { "id": "clip-c", "kind": "audio", "nodeId": "node-audio", "trackId": "audio-1", "startMs": 1000, "durationMs": 4000, "sourceStartMs": 0, "sourceDurationMs": 4000, "volume": 0.8 },
          { "id": "sub-1", "kind": "subtitle", "nodeId": "node-a", "trackId": "subtitle-1", "startMs": 500, "durationMs": 2000, "subtitleEntryIndex": 0, "text": "你好，影策" }
        ],
        "durationMs": 7500
      }
    },
    {
      "name": "split-clip-in-two-deterministic-ids",
      "commands": [
        { "op": "splitClip", "payload": { "id": "clip-a", "splitAtMs": 3000 } }
      ],
      "expected": {
        "version": 2,
        "tracks": [
          { "id": "video-1", "kind": "video", "label": "视频 1", "order": 0 },
          { "id": "audio-1", "kind": "audio", "label": "音频 1", "order": 1 },
          { "id": "subtitle-1", "kind": "subtitle", "label": "字幕 1", "order": 2 },
          { "id": "video-2", "kind": "video", "label": "视频 2", "order": 3 }
        ],
        "clips": [
          { "id": "clip-a", "kind": "video", "nodeId": "node-a", "trackId": "video-1", "startMs": 0, "durationMs": 3000, "sourceStartMs": 0, "sourceDurationMs": 10000, "volume": 1, "fadeInMs": 0, "fadeOutMs": 0 },
          { "id": "clip-a:split:3000", "kind": "video", "nodeId": "node-a", "trackId": "video-1", "startMs": 3000, "durationMs": 2000, "sourceStartMs": 3000, "sourceDurationMs": 10000, "volume": 1, "fadeInMs": 0, "fadeOutMs": 0 },
          { "id": "clip-b", "kind": "video", "nodeId": "node-b", "trackId": "video-1", "startMs": 5000, "durationMs": 3000, "sourceStartMs": 2000, "sourceDurationMs": 8000 },
          { "id": "clip-c", "kind": "audio", "nodeId": "node-audio", "trackId": "audio-1", "startMs": 1000, "durationMs": 4000, "sourceStartMs": 0, "sourceDurationMs": 4000, "volume": 0.8 },
          { "id": "sub-1", "kind": "subtitle", "nodeId": "node-a", "trackId": "subtitle-1", "startMs": 500, "durationMs": 2000, "subtitleEntryIndex": 0, "text": "你好，影策" }
        ],
        "durationMs": 8000
      }
    },
    {
      "name": "remove-clip-recomputes-duration",
      "commands": [
        { "op": "removeClip", "payload": { "id": "clip-c" } }
      ],
      "expected": {
        "version": 2,
        "tracks": [
          { "id": "video-1", "kind": "video", "label": "视频 1", "order": 0 },
          { "id": "audio-1", "kind": "audio", "label": "音频 1", "order": 1 },
          { "id": "subtitle-1", "kind": "subtitle", "label": "字幕 1", "order": 2 },
          { "id": "video-2", "kind": "video", "label": "视频 2", "order": 3 }
        ],
        "clips": [
          { "id": "clip-a", "kind": "video", "nodeId": "node-a", "trackId": "video-1", "startMs": 0, "durationMs": 5000, "sourceStartMs": 0, "sourceDurationMs": 10000, "volume": 1, "fadeInMs": 0, "fadeOutMs": 0 },
          { "id": "clip-b", "kind": "video", "nodeId": "node-b", "trackId": "video-1", "startMs": 5000, "durationMs": 3000, "sourceStartMs": 2000, "sourceDurationMs": 8000 },
          { "id": "sub-1", "kind": "subtitle", "nodeId": "node-a", "trackId": "subtitle-1", "startMs": 500, "durationMs": 2000, "subtitleEntryIndex": 0, "text": "你好，影策" }
        ],
        "durationMs": 8000
      }
    },
    {
      "name": "set-clip-property-whitelist-fields",
      "commands": [
        { "op": "setClipProperty", "payload": { "id": "clip-a", "patch": { "volume": 0.5, "fadeInMs": 200, "fadeOutMs": 400 } } }
      ],
      "expected": {
        "version": 2,
        "tracks": [
          { "id": "video-1", "kind": "video", "label": "视频 1", "order": 0 },
          { "id": "audio-1", "kind": "audio", "label": "音频 1", "order": 1 },
          { "id": "subtitle-1", "kind": "subtitle", "label": "字幕 1", "order": 2 },
          { "id": "video-2", "kind": "video", "label": "视频 2", "order": 3 }
        ],
        "clips": [
          { "id": "clip-a", "kind": "video", "nodeId": "node-a", "trackId": "video-1", "startMs": 0, "durationMs": 5000, "sourceStartMs": 0, "sourceDurationMs": 10000, "volume": 0.5, "fadeInMs": 200, "fadeOutMs": 400 },
          { "id": "clip-b", "kind": "video", "nodeId": "node-b", "trackId": "video-1", "startMs": 5000, "durationMs": 3000, "sourceStartMs": 2000, "sourceDurationMs": 8000 },
          { "id": "clip-c", "kind": "audio", "nodeId": "node-audio", "trackId": "audio-1", "startMs": 1000, "durationMs": 4000, "sourceStartMs": 0, "sourceDurationMs": 4000, "volume": 0.8 },
          { "id": "sub-1", "kind": "subtitle", "nodeId": "node-a", "trackId": "subtitle-1", "startMs": 500, "durationMs": 2000, "subtitleEntryIndex": 0, "text": "你好，影策" }
        ],
        "durationMs": 8000
      }
    },
    {
      "name": "add-subtitle-clip",
      "commands": [
        { "op": "addSubtitle", "payload": { "clip": { "id": "sub-2", "kind": "subtitle", "nodeId": "node-b", "trackId": "subtitle-1", "startMs": 5200, "durationMs": 1800, "subtitleEntryIndex": 1, "text": "副标题字幕" } } }
      ],
      "expected": {
        "version": 2,
        "tracks": [
          { "id": "video-1", "kind": "video", "label": "视频 1", "order": 0 },
          { "id": "audio-1", "kind": "audio", "label": "音频 1", "order": 1 },
          { "id": "subtitle-1", "kind": "subtitle", "label": "字幕 1", "order": 2 },
          { "id": "video-2", "kind": "video", "label": "视频 2", "order": 3 }
        ],
        "clips": [
          { "id": "clip-a", "kind": "video", "nodeId": "node-a", "trackId": "video-1", "startMs": 0, "durationMs": 5000, "sourceStartMs": 0, "sourceDurationMs": 10000, "volume": 1, "fadeInMs": 0, "fadeOutMs": 0 },
          { "id": "clip-b", "kind": "video", "nodeId": "node-b", "trackId": "video-1", "startMs": 5000, "durationMs": 3000, "sourceStartMs": 2000, "sourceDurationMs": 8000 },
          { "id": "clip-c", "kind": "audio", "nodeId": "node-audio", "trackId": "audio-1", "startMs": 1000, "durationMs": 4000, "sourceStartMs": 0, "sourceDurationMs": 4000, "volume": 0.8 },
          { "id": "sub-1", "kind": "subtitle", "nodeId": "node-a", "trackId": "subtitle-1", "startMs": 500, "durationMs": 2000, "subtitleEntryIndex": 0, "text": "你好，影策" },
          { "id": "sub-2", "kind": "subtitle", "nodeId": "node-b", "trackId": "subtitle-1", "startMs": 5200, "durationMs": 1800, "subtitleEntryIndex": 1, "text": "副标题字幕" }
        ],
        "durationMs": 8000
      }
    },
    {
      "name": "remove-subtitle-clip",
      "commands": [
        { "op": "removeSubtitle", "payload": { "id": "sub-1" } }
      ],
      "expected": {
        "version": 2,
        "tracks": [
          { "id": "video-1", "kind": "video", "label": "视频 1", "order": 0 },
          { "id": "audio-1", "kind": "audio", "label": "音频 1", "order": 1 },
          { "id": "subtitle-1", "kind": "subtitle", "label": "字幕 1", "order": 2 },
          { "id": "video-2", "kind": "video", "label": "视频 2", "order": 3 }
        ],
        "clips": [
          { "id": "clip-a", "kind": "video", "nodeId": "node-a", "trackId": "video-1", "startMs": 0, "durationMs": 5000, "sourceStartMs": 0, "sourceDurationMs": 10000, "volume": 1, "fadeInMs": 0, "fadeOutMs": 0 },
          { "id": "clip-b", "kind": "video", "nodeId": "node-b", "trackId": "video-1", "startMs": 5000, "durationMs": 3000, "sourceStartMs": 2000, "sourceDurationMs": 8000 },
          { "id": "clip-c", "kind": "audio", "nodeId": "node-audio", "trackId": "audio-1", "startMs": 1000, "durationMs": 4000, "sourceStartMs": 0, "sourceDurationMs": 4000, "volume": 0.8 }
        ],
        "durationMs": 8000
      }
    },
    {
      "name": "rebuild-subtitle-clips-replaces-stale-snapshots",
      "commands": [
        { "op": "rebuildSubtitleClips", "payload": { "nodeId": "node-a", "entries": [ { "index": 0, "startMs": 500, "endMs": 2500, "text": "你好，影策" }, { "index": 1, "startMs": 3000, "endMs": 4200, "text": "第二句字幕" } ] } }
      ],
      "expected": {
        "version": 2,
        "tracks": [
          {"id": "video-1","kind": "video","label": "视频 1","order": 0},
          {"id": "audio-1","kind": "audio","label": "音频 1","order": 1},
          {"id": "subtitle-1","kind": "subtitle","label": "字幕 1","order": 2},
          {"id": "video-2","kind": "video","label": "视频 2","order": 3}
        ],
        "clips": [
          {"id": "clip-a","kind": "video","nodeId": "node-a","trackId": "video-1","startMs": 0,"durationMs": 5000,"sourceStartMs": 0,"sourceDurationMs": 10000,"volume": 1,"fadeInMs": 0,"fadeOutMs": 0},
          {"id": "clip-b","kind": "video","nodeId": "node-b","trackId": "video-1","startMs": 5000,"durationMs": 3000,"sourceStartMs": 2000,"sourceDurationMs": 8000},
          {"id": "clip-c","kind": "audio","nodeId": "node-audio","trackId": "audio-1","startMs": 1000,"durationMs": 4000,"sourceStartMs": 0,"sourceDurationMs": 4000,"volume": 0.8},
          {"id": "node-a:subtitle:0","kind": "subtitle","nodeId": "node-a","trackId": "subtitle-1","startMs": 500,"durationMs": 2000,"subtitleEntryIndex": 0,"text": "你好，影策"},
          {"id": "node-a:subtitle:1","kind": "subtitle","nodeId": "node-a","trackId": "subtitle-1","startMs": 3000,"durationMs": 1200,"subtitleEntryIndex": 1,"text": "第二句字幕"}
        ],
        "durationMs": 8000
      }
    }

  ]
}