{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://a2ui.org/specification/v0_9/client_data_model.json",
  "title": "A2UI Client Data Model Schema",
  "description": "Schema for attaching the client data model to A2A message metadata. This object should be placed in the `a2uiClientDataModel` field of the metadata.",
  "type": "object",
  "properties": {
    "version": {
      "const": "v0.9"
    },
    "surfaces": {
      "type": "object",
      "description": "A map of surface IDs to their current data models.",
      "additionalProperties": {
        "type": "object",
        "description": "The current data model for the surface, as a standard JSON object."
      }
    }
  },
  "required": ["version", "surfaces"],
  "additionalProperties": false
}