Invalid mcp_call Event Type

[ghdcksgml1]

Confirm this is a Node library issue and not an underlying OpenAI API issue

• This is an issue with the Node library

Describe the bug

Looking at the OpenAI API reference, the event type for mcp_call arguments is documented as response.mcp_call.arguments.delta. However, openai-node represents this event as response.mcp_call.arguments_delta.

I tried changing the event type to match the API reference documentation using ts-ignore, but it still didn't work. When I checked what was actually being sent, I was shocked to find that it's coming through as response.mcp_call_arguments.delta...

Please fix this bug!

Interestingly, the openai-agent project is using response.mcp_call_arguments.delta lol

To Reproduce

check my link

Code snippets

OS

macOS

Node version

Node 22

Library version

openai latest