`animate`

Tweens or steps a property on something already on stage. Not the same as show/hide Transitions.

{
  "type": "animate",
  "target": "char:left",
  "property": "position_x",
  "to": 40,
  "duration": 0.4,
  "relative": true
}

Usually you need

Field	Type	Default	Effect
`target`	string	—	`bg`, `char:slot`, `sprite:id`, `obj:id`, `panel`, …
`property`	string	—	`opacity`, `position_x` / `y`, `scale`, `modulate`, `shader:u`, …
`to`	any	—	End value
`duration`	≥ 0	`0.5` (tween)	Seconds
`preset`	string	—	`shake` / `pulse` / `flash` / `bob` or author preset

Field	Type	Default	Effect
`id`	string	auto	For `stop_animate`
`preset`	string	—	Built-in or `animations/presets.json`
`mode`	`"tween"` \| `"keyframes"` \| `"frames"`	inferred	Mode
`target`	string	—	Target grammar
`layer`	string	—	Optional layer hint for some targets
`property`	string	—	Property path
`from` / `to`	any	from = current	Ends
`duration`	≥ 0	`0.5`	Seconds
`ease`	`in` \| `out` \| `in_out` \| `out_in`	`"in_out"`	Ease
`trans`	linear \| sine \| …	`"linear"`	Curve
`loop`	bool \| `"ping_pong"`	`false`	Loop
`count`	≥ 0	`0` (= ∞ when looping)	Iterations
`relative`	bool	`false`	Offsets
`keyframes` / `frames` / `fps` / `start_frame`	…	fps min 0.001	Advanced
`intensity` / `decay` / `scale_from` / `scale_to` / `distance` / `color` / `opacity`	preset extras	shake 5 / true; pulse 0.95–1.05; bob 10	Preset knobs
`when`	expression	—	Skip when falsy

Preset duration defaults: shake 0.4, pulse 0.6, flash 0.3, bob 2.0.

Do not animate opacity while a fade transition runs on the same node. Animations · presets · stop_animate.