hack: to get response format to work properly

I think this might be a bug with requesty

backend/agents/create_list_agent.go

@@ -22,7 +22,7 @@ and add a good description for each one.
 You can add fields if you think they make a lot of sense.
 You can remove fields if they are not correct, but be sure before you do this.
 
-You must respond in json format
+You must respond in json format, do not add backticks to the json. ONLY valid json.
 `
 
 const listJsonSchema = `
@@ -86,7 +86,7 @@ func (agent *CreateListAgent) CreateList(log *log.Logger, userID uuid.UUID, stac
 		Model:       "policy/images",
 		Temperature: 0.3,
 		ResponseFormat: client.ResponseFormat{
-			Type:       "json_object",
+			Type:       "json_schema",
 			JsonSchema: listJsonSchema,
 		},
 		Chat: &client.Chat{
@@ -107,7 +107,9 @@ func (agent *CreateListAgent) CreateList(log *log.Logger, userID uuid.UUID, stac
 
 	ctx := context.Background()
 
-	structuredOutput := resp.Choices[0].Message.Content
+	content := resp.Choices[0].Message.Content
+
+	structuredOutput := content[len("```json") : len(content)-3]
 
 	log.Info("", "res", structuredOutput)