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name: unity-timeline description: Edit Unity Timeline assets and tracks

Before calling any skill in this module: if you are about to call a skill with parameters guessed from its name or description, STOP — read this file (or fetch its schema via GET /skills/recommend?includeSchema=true) first. If you already have the parameter definitions from recommend/schema, you may proceed straight to dryRun.

Triggers

• Building cutscenes or sequences
• Creating Timeline assets
• Adding tracks and clips
• 制作过场或序列、创建 Timeline 资产、添加轨道与片段

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	Yes	-	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	Yes	-	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	Yes	-	Name of the track
bindingObjectName	string	Yes	-	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.