{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://digitalme.invoratec.cn/schemas/user-talent-instance.json",
  "title": "UserTalentInstance",
  "description": "一个分身(twin)当前选定的天赋。主天赋不重复存——它就是 twin.profession；这里只存副天赋选择与解锁时间。审核态存 twin.talentAudit。",
  "type": "object",
  "required": ["sub_talents"],
  "additionalProperties": false,
  "properties": {
    "sub_talents": {
      "type": "array",
      "items": { "type": "string" },
      "uniqueItems": true,
      "maxItems": 3,
      "description": "已选副天赋 id（必须 ∈ SUB_REGISTRY）。长度受 maxSubs(level)=min(3,1+level) 限制；服务端 validateSubs 兜底截断。"
    },
    "unlockedAt": { "type": ["string", "null"], "format": "date-time", "default": null, "description": "首次配置副天赋的时间。" }
  },
  "$comment": "关联字段（存在 twins 文档其它位置，非本对象）：twin.profession = 主天赋 id；twin.talentAudit ∈ null|'pending'|'approved'（强合规身份的资质审核态）；twin.verified = 蓝V（admin 置，audit 通过依据）。"
}