set_leds:
  name: Set LEDs
  description: Push segment data to an api_input color strip source
  fields:
    source_id:
      name: Source ID
      description: The api_input CSS source ID (e.g., css_abc12345)
      required: true
      selector:
        text:
    segments:
      name: Segments
      description: >
        List of segment objects. Each segment has: start (int), length (int),
        mode ("solid"/"per_pixel"/"gradient"), color ([R,G,B] for solid),
        colors ([[R,G,B],...] for per_pixel/gradient)
      required: true
      selector:
        object: