@Matthieu GARCIA
Hello! I understand you're looking to streamline the process of uploading files and associating them with an assistant ID. While I can't directly change the API's functionality, I can certainly pass on your feedback to our development team for consideration in future updates.
In the meantime, you can continue to use the current process, which involves uploading each file and then associating them with the assistant using the PATCH Update Assistant endpoint. If you need assistance with this process or have any other questions, please let me know!