{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "aps://shared/viewport_command",
  "title": "ViewportCommand",
  "description": "视口命令：驱动右侧可视化的结构化指令（plan.md §6.3）。'说'与'点'两个通道产出同构命令。",
  "type": "object",
  "required": ["cmd", "issuedBy"],
  "properties": {
    "cmd": {
      "description": "命令名：viewport.* 为纯视口状态；world.refresh 通知前端重拉世界数据",
      "type": "string",
      "enum": [
        "viewport.mode",
        "viewport.filter",
        "viewport.focus",
        "viewport.highlight",
        "viewport.timescale",
        "viewport.reset",
        "world.refresh"
      ]
    },
    "target": { "description": "目标对象 ID（如聚焦的产线 ID）", "type": ["string", "null"] },
    "params": { "description": "命令参数（按 cmd 而异）", "type": "object" },
    "issuedBy": { "description": "发起方：LLM 解析 / 用户手点", "type": "string", "enum": ["LLM", "USER", "SYSTEM"] }
  }
}