Is JSON ResponseSchema worked for GeminiPromptExecutionSettings ?

[VladyslavLishchyna]

Hi community! I try to get response from Gemini as JSON object and use like this

GeminiPromptExecutionSettings executionSettings = new()
{
    FunctionChoiceBehavior = FunctionChoiceBehavior.None(),
    ResponseMimeType = "application/json",
    ResponseSchema = ChatResponseFormat.ForJsonSchema(jsonSchema)
};

And have 400 status code

Exception while start application - Microsoft.SemanticKernel.HttpOperationException: Response status code does not indicate success: 400 (Bad Request).
 ---> System.Net.Http.HttpRequestException: Response status code does not indicate success: 400 (Bad Request).
   at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode()

Schema looks like:

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "title": "Response",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "FirstProperty": {
      "type": "integer",
      "format": "int32"
    },
    "Summary": {
      "type": "string"
    }
  }
}

If I run without ResponseSchema parameter I receive response successfully

[VladyslavLishchyna]

Now I do like this and its working, but this is looks strange

  var settings = new SystemTextJsonSchemaGeneratorSettings { SchemaType = SchemaType.OpenApi3 };
  var schema = JsonSchema.FromType<MyResponse>(settings);
  var schemaAsString = schema.ToJson().Replace("\"$schema\": \"http://json-schema.org/draft-04/schema#\",","");

  GeminiPromptExecutionSettings executionSettings = new()
  {
	FunctionChoiceBehavior = FunctionChoiceBehavior.None(),
	ResponseMimeType = "application/json",
	ResponseSchema = JsonDocument.Parse(schemaAsString).RootElement,
	Temperature = 0.4,
	TopP = 0.95,
  };

[rogerbarreto]

@VladyslavLishchyna , thanks for the added context here.

[markwallace-microsoft]

@rogerbarreto have you seen this before?

[rogerbarreto]

@markwallace-microsoft No, I will investigate this, probably is related to the JsonElement vs JsonDocument path.

[rogerbarreto]

Closing this as I'm tracking the issue here:

• .Net: ResponseSchema not working with ForJsonSchema in GeminiPromptExecutionSettings #12313