Unity Timeline Agent Skill

Timeline Skills

Create and modify Unity Timeline assets — add typed tracks, drop clips on tracks, bind objects, set duration / wrap mode, and play/pause/stop the editor preview through the PlayableDirector.

Operating Mode

• Approval：查询类 skill（timeline_list_tracks，源码标 SkillMode.SemiAuto）直接执行；其余变更/播放类（timeline_create / add_*_track / timeline_add_clip / timeline_set_duration / timeline_play / timeline_set_binding，标 SkillMode.FullAuto）需用户 grant，grant 后服务端一步执行返结果。
• Auto / Bypass：未被禁列表拦截的 skill 直接执行。
• 本模块含 Delete 类 skill：timeline_remove_track 标记为 SkillOperation.Delete，被 IsForbiddenInSemi 静态拦截 —— 仅 Bypass 模式或加入 Allowlist 才能调用。
• timeline_play 仅驱动 Editor 预览（PlayableDirector.Evaluate / Play 在编辑器上下文），不会进入 Play mode。

DO NOT (common hallucinations):

• timeline_create_animation / timeline_add_track do not exist → use the typed track skills: timeline_add_animation_track, timeline_add_audio_track, timeline_add_activation_track, timeline_add_control_track, timeline_add_signal_track
• timeline_add_keyframe does not exist → Timeline uses clips, not direct keyframes; use timeline_add_clip
• timeline_set_duration sets the Timeline asset duration, not individual clip duration

Routing:

• For Animator parameters/states → use animator module
• For runtime animation playback → use editor_play or write C# via script module

Skills

timeline_create

Create a new Timeline asset and Director instance.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| name | string | Yes | - | Name of the timeline/object |

| folder | string | No | "Assets/Timelines" | Folder to save asset |

Returns: { success, assetPath, gameObjectName, directorInstanceId }

timeline_add_audio_track

Add an Audio track to a Timeline.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| name | string | No | - | GameObject name with PlayableDirector |

| instanceId | int | No | 0 | GameObject instance ID |

| path | string | No | - | GameObject hierarchy path |

| trackName | string | No | "Audio Track" | Name of the new track |

Returns: { success, trackName }

timeline_add_animation_track

Add an Animation track to a Timeline, optionally binding an object.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| name | string | No | - | GameObject name with PlayableDirector |

| instanceId | int | No | 0 | GameObject instance ID |

| path | string | No | - | GameObject hierarchy path |

| trackName | string | No | "Animation Track" | Name of the new track |

| bindingObjectName | string | No | - | Name of the GameObject to bind (animator) |

Returns: { success, trackName, boundObject }

timeline_add_activation_track

Add an Activation track to control object visibility.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| name | string | No | - | GameObject name with PlayableDirector |

| instanceId | int | No | 0 | GameObject instance ID |

| path | string | No | - | GameObject hierarchy path |

| trackName | string | No | "Activation Track" | Name of the new track |

Returns: { success, trackName }

timeline_add_control_track

Add a Control track for nested Timelines or prefab spawning.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| name | string | No | - | GameObject name with PlayableDirector |

| instanceId | int | No | 0 | GameObject instance ID |

| path | string | No | - | GameObject hierarchy path |

| trackName | string | No | "Control Track" | Name of the new track |

Returns: { success, trackName }

timeline_add_signal_track

Add a Signal track for event markers.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| name | string | No | - | GameObject name with PlayableDirector |

| instanceId | int | No | 0 | GameObject instance ID |

| path | string | No | - | GameObject hierarchy path |

| trackName | string | No | "Signal Track" | Name of the new track |

Returns: { success, trackName }

timeline_remove_track

Remove a track by name from a Timeline.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| name | string | No | - | GameObject name with PlayableDirector |

| instanceId | int | No | 0 | GameObject instance ID |

| path | string | No | - | GameObject hierarchy path |

| trackName | string | No | - | Name of the track to remove |

Returns: { success, removed }

timeline_list_tracks

List all tracks in a Timeline.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| name | string | No | - | GameObject name with PlayableDirector |

| instanceId | int | No | 0 | GameObject instance ID |

| path | string | No | - | GameObject hierarchy path |

Returns: { count, tracks: [{ name, type, muted, clipCount }] }

timeline_add_clip

Add a clip to a track by track name.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| name | string | No | - | GameObject name with PlayableDirector |

| instanceId | int | No | 0 | GameObject instance ID |

| path | string | No | - | GameObject hierarchy path |

| trackName | string | No | - | Name of the target track |

| start | double | No | 0 | Clip start time in seconds |

| duration | double | No | 1 | Clip duration in seconds |

Returns: { success, trackName, clipStart, clipDuration }

timeline_set_duration

Set Timeline duration and wrap mode.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| name | string | No | - | GameObject name with PlayableDirector |

| instanceId | int | No | 0 | GameObject instance ID |

| path | string | No | - | GameObject hierarchy path |

| duration | double | No | 0 | Fixed duration in seconds |

| wrapMode | string | No | - | Wrap mode: Hold/Loop/None |

Returns: { success, duration, wrapMode }

timeline_play

Play, pause, or stop a Timeline (Editor preview).

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| name | string | No | - | GameObject name with PlayableDirector |

| instanceId | int | No | 0 | GameObject instance ID |

| path | string | No | - | GameObject hierarchy path |

| action | string | No | "play" | Action: play/pause/stop |

Returns: { success, action, time }

timeline_set_binding

Set the binding object for a track.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| name | string | No | - | GameObject name with PlayableDirector |

| instanceId | int | No | 0 | GameObject instance ID |

| path | string | No | - | GameObject hierarchy path |

| trackName | string | No | - | Name of the track |

| bindingObjectName | string | No | - | Name of the object to bind |

Returns: { success, trackName, boundTo }

Exact Signatures

Exact names, parameters, defaults, and returns are defined by GET /skills/schema or unity_skills.get_skill_schema(), not by this file.