{
  "$id": "https://oaslananka.github.io/a2amesh/schemas/task.schema.json",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "additionalProperties": false,
  "description": "Agent2Agent task payloads returned by A2A Mesh.",
  "properties": {
    "artifacts": {
      "items": {
        "additionalProperties": false,
        "properties": {
          "artifactId": { "type": "string" },
          "description": { "type": "string" },
          "extensions": { "items": { "type": "string" }, "type": "array" },
          "index": { "maximum": 9007199254740991, "minimum": 0, "type": "integer" },
          "lastChunk": { "type": "boolean" },
          "metadata": {
            "additionalProperties": {},
            "propertyNames": { "type": "string" },
            "type": "object"
          },
          "name": { "type": "string" },
          "parts": {
            "items": {
              "oneOf": [
                {
                  "additionalProperties": false,
                  "properties": {
                    "text": { "type": "string" },
                    "type": { "const": "text", "type": "string" }
                  },
                  "required": ["type", "text"],
                  "type": "object"
                },
                {
                  "additionalProperties": false,
                  "properties": {
                    "file": {
                      "additionalProperties": false,
                      "properties": {
                        "bytes": { "type": "string" },
                        "mimeType": { "type": "string" },
                        "name": { "type": "string" },
                        "uri": { "type": "string" }
                      },
                      "required": ["mimeType"],
                      "type": "object"
                    },
                    "type": { "const": "file", "type": "string" }
                  },
                  "required": ["type", "file"],
                  "type": "object"
                },
                {
                  "additionalProperties": false,
                  "properties": {
                    "data": {
                      "additionalProperties": {},
                      "propertyNames": { "type": "string" },
                      "type": "object"
                    },
                    "type": { "const": "data", "type": "string" }
                  },
                  "required": ["type", "data"],
                  "type": "object"
                }
              ]
            },
            "type": "array"
          },
          "principalId": { "type": "string" },
          "tenantId": { "type": "string" }
        },
        "required": ["artifactId", "parts", "index"],
        "type": "object"
      },
      "type": "array"
    },
    "contextId": { "type": "string" },
    "extensions": { "items": { "type": "string" }, "type": "array" },
    "history": {
      "items": {
        "additionalProperties": false,
        "properties": {
          "contextId": { "type": "string" },
          "kind": { "const": "message", "type": "string" },
          "messageId": { "type": "string" },
          "parts": {
            "items": {
              "oneOf": [
                {
                  "additionalProperties": false,
                  "properties": {
                    "text": { "type": "string" },
                    "type": { "const": "text", "type": "string" }
                  },
                  "required": ["type", "text"],
                  "type": "object"
                },
                {
                  "additionalProperties": false,
                  "properties": {
                    "file": {
                      "additionalProperties": false,
                      "properties": {
                        "bytes": { "type": "string" },
                        "mimeType": { "type": "string" },
                        "name": { "type": "string" },
                        "uri": { "type": "string" }
                      },
                      "required": ["mimeType"],
                      "type": "object"
                    },
                    "type": { "const": "file", "type": "string" }
                  },
                  "required": ["type", "file"],
                  "type": "object"
                },
                {
                  "additionalProperties": false,
                  "properties": {
                    "data": {
                      "additionalProperties": {},
                      "propertyNames": { "type": "string" },
                      "type": "object"
                    },
                    "type": { "const": "data", "type": "string" }
                  },
                  "required": ["type", "data"],
                  "type": "object"
                }
              ]
            },
            "type": "array"
          },
          "role": { "enum": ["ROLE_USER", "ROLE_AGENT"], "type": "string" },
          "timestamp": {
            "format": "date-time",
            "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z|([+-](?:[01]\\d|2[0-3]):[0-5]\\d)))$",
            "type": "string"
          }
        },
        "required": ["role", "parts", "messageId", "timestamp"],
        "type": "object"
      },
      "type": "array"
    },
    "id": { "type": "string" },
    "kind": { "const": "task", "type": "string" },
    "metadata": {
      "additionalProperties": {},
      "propertyNames": { "type": "string" },
      "type": "object"
    },
    "principalId": { "type": "string" },
    "sessionId": { "type": "string" },
    "status": {
      "additionalProperties": false,
      "properties": {
        "message": { "type": "string" },
        "state": {
          "enum": [
            "SUBMITTED",
            "QUEUED",
            "WORKING",
            "INPUT_REQUIRED",
            "AUTH_REQUIRED",
            "WAITING_ON_EXTERNAL",
            "COMPLETED",
            "FAILED",
            "CANCELED",
            "REJECTED"
          ],
          "type": "string"
        },
        "timestamp": {
          "format": "date-time",
          "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z|([+-](?:[01]\\d|2[0-3]):[0-5]\\d)))$",
          "type": "string"
        }
      },
      "required": ["state", "timestamp"],
      "type": "object"
    },
    "tenantId": { "type": "string" }
  },
  "required": ["id", "status", "history"],
  "title": "A2A Mesh Task",
  "type": "object",
  "x-a2a-source": {
    "schemaSymbol": "TaskSchema",
    "sourceFile": "packages/runtime/src/types/task.ts",
    "typeSymbol": "Task"
  }
}