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topenkoff
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Hi. I noticed that unmarshaling response_format field in ChatCompletionNewParams is incorrect due to a forgotten union registration.

package main

import (
	"fmt"

	"github.com/openai/openai-go"
)

func main() {
	body := `
	{
		"model": "my_model"
		"response_format": {
			"type": "json_schema",
			"json_schema": {
				"name": "MySchema",
				"schema": {
					"type":"object",
					"properties":{
						"name":{
							"type": "string",
							"description": "The name"
						}
					},
					"additionalProperties":false,
					"required":["name"]
				}
			}
		}
	}
	`
	var params openai.ChatCompletionNewParams
	params.UnmarshalJSON([]byte(body))
	fmt.Println(params.ResponseFormat.OfText)
	raw, _ := params.MarshalJSON()
	fmt.Println(string(raw))
}
❯ go run main.go
&{json_schema {{<nil>}}}
{"model":"my_model","response_format":{"type":"json_schema"}}

@topenkoff topenkoff requested a review from a team as a code owner June 4, 2025 10:01
@khaag-apple
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@jacobzim-stl would y'all be able to take a look at this please?

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2 participants