{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://dina.ai/protocol/schemas/capability-advertisement.json",
  "title": "Dina Capability Advertisement",
  "description": "Static advertisement of protocol versions, profiles, capabilities, and limits supported by a Dina-compatible implementation.",
  "type": "object",
  "required": [
    "schema_version",
    "advertisement_id",
    "protocol_versions",
    "profiles",
    "capabilities"
  ],
  "properties": {
    "schema_version": {
      "const": "1"
    },
    "advertisement_id": {
      "type": "string",
      "minLength": 1
    },
    "did": {
      "$ref": "#/$defs/did"
    },
    "implementation": {
      "type": "object",
      "properties": {
        "name": {
          "type": "string",
          "minLength": 1
        },
        "version": {
          "type": "string"
        },
        "home_url": {
          "type": "string",
          "format": "uri"
        }
      },
      "required": ["name"],
      "additionalProperties": true
    },
    "protocol_versions": {
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1
      },
      "minItems": 1,
      "uniqueItems": true
    },
    "profiles": {
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1
      },
      "minItems": 1,
      "uniqueItems": true
    },
    "capabilities": {
      "type": "object",
      "required": ["auth", "d2d", "interaction", "trust"],
      "properties": {
        "auth": {
          "type": "object",
          "properties": {
            "methods": {
              "type": "array",
              "items": {
                "type": "string",
                "minLength": 1
              },
              "minItems": 1,
              "uniqueItems": true
            },
            "pairing_methods": {
              "type": "array",
              "items": {
                "type": "string",
                "minLength": 1
              },
              "uniqueItems": true
            }
          },
          "required": ["methods"],
          "additionalProperties": true
        },
        "d2d": {
          "type": "object",
          "properties": {
            "message_families": {
              "type": "array",
              "items": {
                "type": "string",
                "minLength": 1
              },
              "uniqueItems": true
            },
            "request_modes": {
              "type": "array",
              "items": {
                "type": "string",
                "minLength": 1
              },
              "uniqueItems": true
            },
            "lifecycle_states": {
              "type": "array",
              "items": {
                "type": "string",
                "minLength": 1
              },
              "uniqueItems": true
            },
            "supports_mailbox_relay": {
              "type": "boolean"
            },
            "supports_federated_execution": {
              "type": "boolean"
            }
          },
          "additionalProperties": true
        },
        "interaction": {
          "type": "object",
          "properties": {
            "operations": {
              "type": "array",
              "items": {
                "type": "string",
                "minLength": 1
              },
              "uniqueItems": true
            },
            "response_envelope_versions": {
              "type": "array",
              "items": {
                "type": "string",
                "minLength": 1
              },
              "uniqueItems": true
            },
            "response_kinds": {
              "type": "array",
              "items": {
                "type": "string",
                "minLength": 1
              },
              "uniqueItems": true
            },
            "response_extensions": {
              "type": "array",
              "items": {
                "type": "string",
                "minLength": 1
              },
              "uniqueItems": true
            },
            "supports_proactive_delivery": {
              "type": "boolean"
            }
          },
          "additionalProperties": true
        },
        "trust": {
          "type": "object",
          "properties": {
            "collections": {
              "type": "array",
              "items": {
                "type": "string",
                "minLength": 1
              },
              "uniqueItems": true
            },
            "supports_publish": {
              "type": "boolean"
            },
            "supports_query": {
              "type": "boolean"
            }
          },
          "additionalProperties": true
        },
        "storage": {
          "type": "object",
          "properties": {
            "supports_logical_export_import": {
              "type": "boolean"
            },
            "encrypted_vault_profiles": {
              "type": "array",
              "items": {
                "type": "string",
                "minLength": 1
              },
              "uniqueItems": true
            }
          },
          "additionalProperties": true
        },
        "delivery": {
          "type": "object",
          "properties": {
            "modes": {
              "type": "array",
              "items": {
                "type": "string",
                "minLength": 1
              },
              "uniqueItems": true
            }
          },
          "additionalProperties": true
        }
      },
      "additionalProperties": true
    },
    "limits": {
      "type": "object",
      "properties": {
        "max_payload_bytes": {
          "type": "integer",
          "minimum": 0
        },
        "max_attachment_bytes": {
          "type": "integer",
          "minimum": 0
        },
        "max_timeout_seconds": {
          "type": "integer",
          "minimum": 0
        }
      },
      "additionalProperties": true
    },
    "extensions": {
      "$ref": "#/$defs/extensions"
    }
  },
  "additionalProperties": false,
  "$defs": {
    "did": {
      "type": "string",
      "pattern": "^did:[a-z0-9]+:.+$"
    },
    "extensions": {
      "type": "object",
      "propertyNames": {
        "pattern": "^[A-Za-z0-9._:-]+$"
      },
      "additionalProperties": true
    }
  }
}