{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/ards-project/ard-spec/main/spec/schemas/ai-catalog.schema.json",
  "title": "AICatalogManifest",
  "description": "JSON Schema for the ai-catalog.json capability manifest, defining how AI artifacts are advertised.",
  "type": "object",
  "required": ["specVersion", "entries"],
  "properties": {
    "specVersion": {
      "type": "string",
      "description": "Version of the ai-catalog specification used in this manifest.",
      "enum": ["1.0"]
    },
    "host": {
      "type": "object",
      "description": "Information about the catalog publisher or hosting entity.",
      "required": ["displayName"],
      "properties": {
        "displayName": {
          "type": "string",
          "description": "Human-readable name of the host."
        },
        "identifier": {
          "type": "string",
          "description": "Cryptographic or verifiable identifier of the host (e.g. did:web:domain.com)."
        },
        "documentationUrl": {
          "type": "string",
          "format": "uri",
          "description": "URL to publisher documentation."
        },
        "logoUrl": {
          "type": "string",
          "format": "uri",
          "description": "URL to the publisher's logo image."
        },
        "trustManifest": {
          "$ref": "#/$defs/trustManifest"
        }
      },
      "additionalProperties": false
    },
    "entries": {
      "type": "array",
      "description": "List of AI agent or capability catalog entries.",
      "items": {
        "$ref": "#/$defs/catalogEntry"
      }
    }
  },
  "additionalProperties": false,
  "$defs": {
    "catalogEntry": {
      "type": "object",
      "description": "A single AI capability entry within the catalog.",
      "required": ["identifier", "displayName", "type"],
      "oneOf": [
        {
          "required": ["url"],
          "not": { "required": ["data"] }
        },
        {
          "required": ["data"],
          "not": { "required": ["url"] }
        }
      ],
      "properties": {
        "identifier": {
          "type": "string",
          "pattern": "^urn:air:[a-zA-Z0-9.-]+(:[a-zA-Z0-9._-]+)+$",
          "description": "RFC 8141-compliant unique logical URN formatted as: urn:air:<publisher>:<namespace>:<agent-name>"
        },
        "displayName": {
          "type": "string",
          "description": "Human-friendly display name."
        },
        "type": {
          "type": "string",
          "description": "IANA Media Type indicating the specific protocol wrapper or payload structure (e.g. application/mcp-server-card+json)."
        },
        "url": {
          "type": "string",
          "format": "uri",
          "description": "HTTP URL reference to retrieve the full artifact document."
        },
        "data": {
          "type": "object",
          "description": "Embedded JSON object containing the complete artifact specification inline."
        },
        "description": {
          "type": "string",
          "description": "Brief natural-language description of the capability."
        },
        "tags": {
          "type": "array",
          "items": { "type": "string" },
          "description": "Tags or keywords for basic categorizing and filtering."
        },
        "capabilities": {
          "type": "array",
          "items": { "type": "string" },
          "description": "Explicit high-performance indexing tags representing skills, tools, or functions (e.g. ['WeatherTool', 'ForecastTool'])."
        },
        "representativeQueries": {
          "type": "array",
          "minItems": 2,
          "maxItems": 5,
          "items": { "type": "string" },
          "description": "Representative natural-language search queries used for indexing and vector embedding generation."
        },
        "version": {
          "type": "string",
          "description": "Semantic version of the capability."
        },
        "updatedAt": {
          "type": "string",
          "format": "date-time",
          "description": "ISO 8601 timestamp of the last modification."
        },
        "metadata": {
          "type": "object",
          "description": "Arbitrary key-value pairs for custom extensions.",
          "additionalProperties": {
            "type": ["string", "number", "boolean", "null"]
          }
        },
        "trustManifest": {
          "$ref": "#/$defs/trustManifest"
        }
      }
    },
    "trustManifest": {
      "type": "object",
      "description": "Zero-trust security, identity, and compliance envelope metadata.",
      "required": ["identity"],
      "properties": {
        "identity": {
          "type": "string",
          "description": "Globally unique cryptographic workload identifier principal (e.g. SPIFFE ID or DID URI)."
        },
        "identityType": {
          "type": "string",
          "enum": ["spiffe", "did", "https", "other"],
          "description": "Hint representing the cryptographic format of the identity."
        },
        "trustSchema": {
          "$ref": "#/$defs/trustSchema"
        },
        "attestations": {
          "type": "array",
          "description": "List of verifiable claims (SOC 2 audits, compliance statements, HIPAA checks).",
          "items": {
            "type": "object",
            "required": ["type", "uri", "mediaType"],
            "properties": {
              "type": {
                "type": "string",
                "description": "Attestation standard type (e.g., SOC2-Type2, HIPAA)."
              },
              "uri": {
                "type": "string",
                "format": "uri",
                "description": "Location of the attestation certificate or document."
              },
              "mediaType": {
                "type": "string",
                "description": "Format of the attestation document (e.g. application/pdf, text/html)."
              },
              "digest": {
                "type": "string",
                "description": "Cryptographic sha256 digest for document integrity verification."
              }
            },
            "additionalProperties": false
          }
        },
        "provenance": {
          "type": "array",
          "description": "Cryptographic lineage trail of the artifact.",
          "items": {
            "type": "object",
            "required": ["relation", "sourceId"],
            "properties": {
              "relation": {
                "type": "string",
                "enum": ["derivedFrom", "publishedFrom", "copiedFrom"],
                "description": "Lineage relation."
              },
              "sourceId": {
                "type": "string",
                "description": "Identifier of the source artifact."
              },
              "sourceDigest": {
                "type": "string",
                "description": "Optional sha256 digest for safety."
              }
            },
            "additionalProperties": false
          }
        },
        "signature": {
          "type": "string",
          "description": "Detached JWS signature generated over the fields of the trustManifest."
        }
      },
      "additionalProperties": false
    },
    "trustSchema": {
      "type": "object",
      "description": "Describes the trust framework applied to the artifact.",
      "required": ["identifier", "version"],
      "properties": {
        "identifier": {
          "type": "string",
          "description": "Unique identifier of the trust schema/framework (e.g. URN)."
        },
        "version": {
          "type": "string",
          "description": "Version of the trust schema/framework."
        },
        "governanceUri": {
          "type": "string",
          "format": "uri",
          "description": "URI pointing to the governance policy document."
        },
        "verificationMethods": {
          "type": "array",
          "items": { "type": "string" },
          "description": "Verification methods supported by the schema (e.g., ['did', 'x509', 'dns-01'])."
        }
      },
      "additionalProperties": false
    }
  }
}