{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:orbiplex:schema:inquirium-adapter-invoke:v1",
  "title": "Inquirium Adapter Invoke v1",
  "description": "Neutral text-generation invocation payload accepted by middleware-hosted Inquirium adapters.",
  "type": "object",
  "additionalProperties": true,
  "required": ["schema", "operation", "model", "input"],
  "properties": {
    "schema": { "const": "inquirium.adapter.invoke.v1" },
    "operation": {
      "type": "string",
      "enum": ["text.generate", "text.respond", "chat.completion"]
    },
    "model": { "type": "string", "minLength": 1 },
    "input": {
      "type": "object",
      "additionalProperties": true,
      "required": ["messages"],
      "properties": {
        "messages": {
          "type": "array",
          "minItems": 1,
          "items": { "$ref": "#/$defs/message" }
        }
      }
    },
    "parameters": {
      "type": "object",
      "additionalProperties": true,
      "properties": {
        "max_tokens": { "type": "integer", "minimum": 1 },
        "temperature": { "type": "number" },
        "top_p": { "type": "number" },
        "stop": {
          "oneOf": [
            { "type": "string" },
            { "type": "array", "items": { "type": "string" } },
            { "type": "null" }
          ]
        },
        "metadata": { "type": "object", "additionalProperties": true },
        "service_tier": { "type": "string" }
      }
    },
    "metadata": { "type": "object", "additionalProperties": true }
  },
  "$defs": {
    "message": {
      "type": "object",
      "additionalProperties": true,
      "required": ["role", "content"],
      "properties": {
        "role": {
          "type": "string",
          "enum": ["system", "developer", "user", "assistant"]
        },
        "content": {
          "oneOf": [
            { "type": "string" },
            {
              "type": "array",
              "items": { "$ref": "#/$defs/textBlock" }
            }
          ]
        }
      }
    },
    "textBlock": {
      "type": "object",
      "additionalProperties": false,
      "required": ["type", "text"],
      "properties": {
        "type": { "const": "text" },
        "text": { "type": "string" }
      }
    }
  }
}