{
  "name": "singleplayer",
  "description": "客户端自己开单人世界（内置服务端）再退出：验证 /world/singleplayer 与 /world/leave，以及客户端 /status 的 inWorld/dimension。整条场景只打客户端探针，不需要专用服（实例 side=client）。",
  "steps": [
    {
      "id": "world-create",
      "target": "client",
      "method": "POST",
      "path": "/world/singleplayer?mode=flat&name=mcdev-sp&reuse=true&backup=skip",
      "expect": {
        "status": 200,
        "contains": { "data.mode": "flat" },
        "json": { "data.renamed": false }
      }
    },
    {
      "id": "world-ready",
      "target": "client",
      "method": "GET",
      "path": "/status",
      "retry": { "times": 60, "intervalMs": 500 },
      "expect": { "status": 200, "json": { "data.inWorld": true } }
    },
    {
      "id": "world-dimension",
      "target": "client",
      "method": "GET",
      "path": "/status",
      "expect": {
        "status": 200,
        "json": { "data.dimension": "minecraft:overworld", "data.linked": true }
      }
    },
    {
      "id": "world-leave",
      "target": "client",
      "method": "POST",
      "path": "/world/leave",
      "expect": { "status": 200, "json": { "data.left": true } }
    },
    {
      "id": "world-left",
      "target": "client",
      "method": "GET",
      "path": "/status",
      "retry": { "times": 40, "intervalMs": 500 },
      "expect": { "status": 200, "json": { "data.inWorld": false } }
    }
  ]
}