vercel/ai with Expo

[younes200]

Hi
I'm try to use vercel/ai with @expo the issue is @expo use @remix-run/node as part of the server api runtime which rely on @remix-run/web-stream and cause ReadableStream incompatibility :

ai/packages/provider-utils/src/response-handler.ts

Line 98 in 4d458df

value: response.body

The error being raised is:

TypeError: First parameter has member 'readable' that is not a ReadableStream.
    at assertReadableStream (/Users/x/test-ai/node_modules/web-streams-polyfill/src/lib/validators/readable-stream.ts:5:11)
    at convertReadableWritablePair (/Users/x/test-ai/node_modules/web-streams-polyfill/src/lib/validators/readable-writable-pair.ts:15:3)
    at ReadableStream.pipeThrough (/Users/x//test-ai/node_modules/web-streams-polyfill/src/lib/readable-stream.ts:223:23)

Is there a way for solve the issue ?

[lgrammel]

Not sure if this helps, but the AI SDK uses the Node standard fetch.

Have you tried setting the following in vite.config.js?

installGlobals({ nativeFetch: true })

More info: https://remix.run/docs/en/main/guides/single-fetch

[younes200]

rhank you, @lgrammel. It's certainly due to the configuration of Remix.