{
  "$id": "https://oaslananka.github.io/a2amesh/schemas/artifact.schema.json",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "additionalProperties": false,
  "description": "Agent2Agent artifact payloads returned on tasks.",
  "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"],
  "title": "A2A Mesh Artifact",
  "type": "object",
  "x-a2a-source": {
    "schemaSymbol": "ExtensibleArtifactSchema",
    "sourceFile": "packages/runtime/src/types/task.ts",
    "typeSymbol": "ExtensibleArtifact"
  }
}