@tanstack/ai packages cannot be resolved by Metro bundler due to ESM-only exports

[GoestaHuppenbauer]

TanStack AI version

0.5.1

Framework/Library version

Expo SDK 52, Metro bundler, React Native

Describe the bug and the steps to reproduce it

All @tanstack/ai packages use ESM-only exports (only import condition in exports map). Metro bundler in React Native/Expo cannot resolve them, including subpath exports like ./adapters. This affects both client-side bundling and API route bundling even with unstable_enablePackageExports: true and unstable_conditionNames configured.

Cannot resolve @tanstack/ai/adapters

Workaround: Manually add default condition to all exports in node_modules/@tanstack/ai/package.json:

json"./adapters": {
  "types": "./dist/esm/activities/index.d.ts",
  "default": "./dist/esm/activities/index.js",
  "import": "./dist/esm/activities/index.js"
}

Fix required: Add require or default condition to all package exports.

Your Minimal, Reproducible Example - (Sandbox Highly Recommended)

Snack

Screenshots or Videos (Optional)

No response

Do you intend to try to help solve this bug with your own PR?

Yes, I think I know how to fix it and will discuss it in the comments of this issue

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• I understand that if my bug cannot be reliable reproduced in a debuggable environment, it will probably not be fixed and this issue may even be closed.