{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://openbook-data-standards.github.io/openbook/schema/discovery.schema.json",
  "title": "OpenBook discovery document",
  "description": "One URL lists a publisher's feeds and additional surfaces (Q49, Q56). GBFS-shaped field names, not a GBFS data wrapper (Q90). Not a list of other publishers (Q94). The publisher object stays identity, not the catalog.",
  "type": "object",
  "required": [
    "lastUpdated",
    "ttl",
    "feeds"
  ],
  "properties": {
    "lastUpdated": {
      "$ref": "common.schema.json#/$defs/dateTime"
    },
    "ttl": {
      "type": "integer",
      "minimum": 0,
      "description": "Cache lifetime in seconds (Q48)."
    },
    "feeds": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "required": [
          "name",
          "url"
        ],
        "additionalProperties": false,
        "patternProperties": {
          "^x_": {}
        },
        "properties": {
          "name": {
            "type": "string",
            "description": "Human label for this entry (snapshot, stream, docs, or a plugin name)."
          },
          "url": {
            "type": "string",
            "format": "uri",
            "description": "For snapshot/stream/docs: the OpenBook surface. For mcp/plugin: that surface's own manifest URL, not an OpenBook document (Q56)."
          },
          "kind": {
            "$ref": "common.schema.json#/$defs/feedKind"
          },
          "id": {
            "$ref": "common.schema.json#/$defs/ownId",
            "description": "Publisher-own id when listing more than one mcp or plugin entry."
          },
          "schemaUrl": {
            "type": "string",
            "format": "uri",
            "description": "URI of the schema that governs the document at url. Required in practice for mcp and plugin; omitted for snapshot/stream (those are OpenBook)."
          }
        }
      }
    }
  },
  "patternProperties": {
    "^x_": {}
  },
  "additionalProperties": false
}