{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://aps.local/contracts/events.schema.json",
  "title": "PlatformEvent",
  "description": "协议 v1 的全部事件类型。新增事件类型必须同时改这里、contracts/events.ts 与 docs/spec/protocol.md。",
  "$ref": "#/$defs/event",
  "$defs": {
    "envelope": {
      "allOf": [{ "$ref": "envelope.schema.json#/$defs/envelope" }]
    },
    "messageDelta": {
      "allOf": [{ "$ref": "#/$defs/envelope" }],
      "properties": {
        "type": { "const": "message.delta" },
        "data": {
          "type": "object",
          "required": ["messageId", "text"],
          "properties": {
            "messageId": { "type": "string" },
            "text": { "type": "string" }
          },
          "additionalProperties": false
        }
      }
    },
    "messageCompleted": {
      "allOf": [{ "$ref": "#/$defs/envelope" }],
      "properties": {
        "type": { "const": "message.completed" },
        "data": {
          "type": "object",
          "required": ["messageId"],
          "properties": {
            "messageId": { "type": "string" },
            "finishReason": { "type": "string", "enum": ["stop", "cancelled", "error", "length"] }
          },
          "additionalProperties": false
        }
      }
    },
    "toolCall": {
      "allOf": [{ "$ref": "#/$defs/envelope" }],
      "properties": {
        "type": { "const": "tool.call" },
        "data": {
          "type": "object",
          "required": ["callId", "capabilityId", "argsDigest"],
          "properties": {
            "callId": { "type": "string" },
            "capabilityId": { "type": "string" },
            "argsDigest": { "type": "string", "description": "参数摘要，不是参数明文" }
          },
          "additionalProperties": false
        }
      }
    },
    "toolResult": {
      "allOf": [{ "$ref": "#/$defs/envelope" }],
      "properties": {
        "type": { "const": "tool.result" },
        "data": {
          "type": "object",
          "required": ["callId", "executionId", "status"],
          "properties": {
            "callId": { "type": "string" },
            "executionId": { "type": "string" },
            "status": { "$ref": "envelope.schema.json#/$defs/status" }
          },
          "additionalProperties": false
        }
      }
    },
    "executionUpdated": {
      "allOf": [{ "$ref": "#/$defs/envelope" }],
      "properties": {
        "type": { "const": "execution.updated" },
        "data": {
          "type": "object",
          "required": ["executionId", "status"],
          "properties": {
            "executionId": { "type": "string" },
            "status": { "$ref": "envelope.schema.json#/$defs/status" },
            "errorKind": { "type": "string" }
          },
          "additionalProperties": false
        }
      }
    },
    "approvalRequested": {
      "allOf": [{ "$ref": "#/$defs/envelope" }],
      "properties": {
        "type": { "const": "approval.requested" },
        "data": {
          "type": "object",
          "required": ["approvalId", "capabilityId", "paramsDigest", "impactSummary", "revision", "expiresAt"],
          "properties": {
            "approvalId": { "type": "string" },
            "capabilityId": { "type": "string" },
            "paramsDigest": { "type": "string" },
            "impactSummary": { "type": "string", "description": "确认卡正文：影响范围与关键参数摘要" },
            "revision": { "type": "integer", "minimum": 0, "description": "目标数据版本；版本变了确认就失效" },
            "expiresAt": { "type": "integer" }
          },
          "additionalProperties": false
        }
      }
    },
    "approvalResolved": {
      "allOf": [{ "$ref": "#/$defs/envelope" }],
      "properties": {
        "type": { "const": "approval.resolved" },
        "data": {
          "type": "object",
          "required": ["approvalId", "decision"],
          "properties": {
            "approvalId": { "type": "string" },
            "decision": { "type": "string", "enum": ["approved", "rejected", "expired"] }
          },
          "additionalProperties": false
        }
      }
    },
    "runState": {
      "allOf": [{ "$ref": "#/$defs/envelope" }],
      "properties": {
        "type": { "const": "run.state" },
        "data": {
          "type": "object",
          "required": ["state"],
          "properties": {
            "state": { "type": "string", "enum": ["idle", "running", "cancelling", "cancelled"] }
          },
          "additionalProperties": false
        }
      }
    },
    "sessionUpdated": {
      "allOf": [{ "$ref": "#/$defs/envelope" }],
      "properties": {
        "type": { "const": "session.updated" },
        "data": {
          "type": "object",
          "properties": {
            "title": { "type": "string" },
            "status": { "type": "string", "enum": ["active", "archived"] }
          },
          "additionalProperties": false
        }
      }
    },
    "error": {
      "allOf": [{ "$ref": "#/$defs/envelope" }],
      "properties": {
        "type": { "const": "error" },
        "data": {
          "type": "object",
          "required": ["code", "message", "retryable"],
          "properties": {
            "code": { "type": "string" },
            "message": { "type": "string" },
            "retryable": { "type": "boolean" },
            "errorKind": { "type": "string" }
          },
          "additionalProperties": false
        }
      }
    },
    "heartbeat": {
      "allOf": [{ "$ref": "#/$defs/envelope" }],
      "properties": {
        "type": { "const": "heartbeat" },
        "data": { "type": "object", "additionalProperties": false }
      }
    },
    "event": {
      "oneOf": [
        { "$ref": "#/$defs/messageDelta" },
        { "$ref": "#/$defs/messageCompleted" },
        { "$ref": "#/$defs/toolCall" },
        { "$ref": "#/$defs/toolResult" },
        { "$ref": "#/$defs/executionUpdated" },
        { "$ref": "#/$defs/approvalRequested" },
        { "$ref": "#/$defs/approvalResolved" },
        { "$ref": "#/$defs/runState" },
        { "$ref": "#/$defs/sessionUpdated" },
        { "$ref": "#/$defs/error" },
        { "$ref": "#/$defs/heartbeat" }
      ]
    }
  }
}