{
  "title": "Lakera Guard Request Structure",
  "description": "Documents the structural composition of a Lakera Guard /v2/guard request body.",
  "type": "object",
  "structure": {
    "messages": {
      "kind": "array",
      "of": "Message",
      "description": "Ordered list of chat messages following the OpenAI chat completions format."
    },
    "Message": {
      "kind": "object",
      "fields": {
        "role": "enum<system|user|assistant|tool>",
        "content": "string"
      }
    },
    "project_id": {
      "kind": "string",
      "optional": true,
      "description": "Project identifier whose assigned policy governs screening."
    },
    "policy_id": {
      "kind": "string",
      "optional": true,
      "description": "Explicit policy override."
    },
    "breakdown": {
      "kind": "boolean",
      "optional": true,
      "default": false
    },
    "payload": {
      "kind": "boolean",
      "optional": true,
      "default": false
    },
    "dev_info": {
      "kind": "object",
      "optional": true
    }
  },
  "notes": [
    "Guard screens the LAST interaction in the messages array against the resolved policy.",
    "Setting breakdown=true returns per-detector results; setting payload=true returns match locations for masking.",
    "If neither project_id nor policy_id is supplied, the organization's default policy applies."
  ]
}