feat: add better-auth support

[HimanshuKumarDutt094]

✅ Checklist

• I have followed every step in the contributing guide (updated 2022-10-06).
• The PR title follows the convention we established conventional-commit
• I performed a functional test on my final commit

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Changelog

I have added support for better-auth support following #2008 and #2116.
what works:

• postgres with drizzle/prisma
• mysql with drizzle/prisma
• sqlite with drizzle/prisma

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Screenshots

[Screenshots]

I am new to this so any feedback and changes welcomed.

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🦋 Changeset detected

Latest commit: 8b11944

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
create-t3-app	Minor

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Project	Deployment	Preview	Comments	Updated (UTC)
create-t3-app	Error			Sep 13, 2025 2:30pm

[HimanshuKumarDutt094]

anyone know why 15.5 fails for pages router I'm stump here, I didn't touch the pages code.

[HimanshuKumarDutt094]

need a way to fix the 512 e2e matrix combo

[kitety]

awesome work!

[HimanshuKumarDutt094]

holy finally passed all test now

[HimanshuKumarDutt094]

@juliusmarminge @nexxeln @c-ehrlich
please take a look at this pr if you folks get a chance

[raulcanodev]

Please! I need this PR to be merged, Better auth with t3 is a great improvement

[HimanshuKumarDutt094]

Please! I need this PR to be merged, Better auth with t3 is a great improvement

Until merged you can copy over the schema + config. Or clone my fork + build locally and npm / pnpm / bun link.
The og next auth uses discord auth but I added GitHub one (only provider change is needed).

[HimanshuKumarDutt094]

note: currently there are no docs for this. because docs themselves need overhaul and there are a lot of discussion and feature request going on regarding them.