fix(auth): rebuild nuxthub postgres adapters per request

[onmax]

Closes #294

Summary

Hyperdrive-backed NuxtHub PostgreSQL auth requests were reusing state across Worker requests in two places: the module-level Better Auth singleton and the generated Drizzle client for the NuxtHub PostgreSQL adapter. Direct @nuxthub/db access still worked, but Better Auth session or user reads could intermittently fail on deployed Workers.

This patch keeps the existing cache for non-database setups, but rebuilds database-backed auth instances per request and generates a fresh Hyperdrive postgres-js client with prepare: false for the NuxtHub PostgreSQL path.

StackBlitz

	Link	Expected
Bug	nuxt-better-auth-294	✅ Builds; deployed Hyperdrive auth reads can fail
Fix	nuxt-better-auth-294-fix	✅ Builds; deployed Hyperdrive auth reads stay stable

CLI Reproduction

git clone --depth 1 --filter=blob:none --sparse https://github.com/onmax/repros.git
cd repros && git sparse-checkout set nuxt-better-auth-294
cd nuxt-better-auth-294 && pnpm i && pnpm build

The runtime bug requires a real Cloudflare Hyperdrive binding. After deploy, verify the bug repro by hitting /api/db-check, signing up, and then repeating authenticated /api/auth-check requests.

Verify fix

git sparse-checkout add nuxt-better-auth-294-fix
cd ../nuxt-better-auth-294-fix && pnpm i && pnpm build

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Project	Deployment	Actions	Updated (UTC)
nuxt-better-auth-docs	Ready	Preview, Comment	Mar 27, 2026 7:27am

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@onmax/nuxt-better-auth@295

commit: 5ea1fdd

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Workers

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Status	Name	Latest Commit	Updated (UTC)
❌ Deployment failed View logs	better-auth	5ea1fdd	Mar 27 2026, 07:27 AM

[jd-solanki]

Hey @onmax

Here's few issues I found:

1. queries are still failing when using database hooks (which means it may happen without this hooks but this errors are occasional I believe this is related to point 2 I mentioned below):
   From repro:

   POST https://nuxthub-better-auth-repro.jdsolanki0001.workers.dev/api/auth/sign-in/email - Ok @ 3/25/2026, 12:52:43 PM
     (error) [request error] [unhandled] [POST] https://nuxthub-better-auth-repro.jdsolanki0001.workers.dev/api/auth/sign-in/email
    {
     message: 'Failed query: select "id", "expires_at", "token", "created_at", "updated_at", "ip_address", "user_agent", "user_id" from "session" limit $1\n' +
       'params: 1',
     statusCode: 500
   }

   Screenshot

   

2. It seems our code is not optimised enough because we're getting Error: Worker exceeded CPU time limit error. Try login multiple times and you will receive 503 error in network tab and you may get full page error as attached below

   page screenshot

   

   From my actual app:

   POST https://nuxtstart.jdsolanki0001.workers.dev/api/auth/sign-in/email - Ok @ 25/3/2026, 12:23:18 pm
     (error) [request error] [unhandled] [POST] https://nuxtstart.jdsolanki0001.workers.dev/api/auth/sign-in/email
    {
     message: 'Failed query: update "user" set "updated_at" = $1, "last_sign_in_at" = $2 where "user"."id" = $3\n' +
       'params: 2026-03-25T06:53:20.965Z,2026-03-25T06:53:20.965Z,NaRranaO7OEatauhsvvvN8ZLKXXfNqHa',
     statusCode: 500
   }

3. Tried pnpm i https://pkg.pr.new/@onmax/nuxt-better-auth@295 in my other repo which uses nuxt layers but it seems pkg pr is outdated because it isn't able to identify auth config I have in one of my layers.

   ERROR  [nuxt-better-auth] Missing server/auth.config.ts - create with defineServerAuth()

Hence using github:nuxt-modules/better-auth#pull/295/head for now

---

related: cloudflare/workers-sdk#6179

[onmax]

@jd-solanki Please try again when you have a moment. I’ve pushed a fix for the issue on our side.

[jd-solanki]

Hey @onmax

sorry I was not able to test it yesterday.

I tried latest commit and now we have initial installation issue where we first install the packages:

---

---

Even after this error when I run dev command we get error in browser:

Cannot find package 'nitropack' imported from /private/tmp/nuxthub-better-auth/.nuxt/better-auth/database.mjs

screenshot

---

I also check installed modules just to be sure:

NOTE: I pushed latest commit of this PR to my repro if you want to try it locally: https://github.com/jd-solanki/nuxthub-better-auth-repro?rgh-link-date=2026-03-24T18%3A52%3A51.000Z

[onmax]

@jd-solanki I pushed another fix and the fresh pkg.pr.new is ready: https://pkg.pr.new/@onmax/nuxt-better-auth@295

I tested it against your repro locally and I could no longer reproduce the nitropack import error. Could you try again and let me know if pnpm install or pnpm dev still fails, ideally with the exact new error output?

[jd-solanki]

Hey @onmax

I tried latest commit but still facing following:

• ni hung up
• If I kill (ctrl + c) the ni hung up and run nr dev then end up with Cannot find package 'nitropack' imported from /private/tmp/nuxthub-better-auth-repro/.nuxt/better-auth/database.mjs
• Same SQL query failures

I updated package lock to exact commit this time so now if you pull latest changes and run ni you might face the same error.

BTW it's surpring to me that your ni didn't froze 🤔

I request you to also validate when you have in your node_modules dir because for me pkg.pr was not installing latest changes you make in this PR.

For example, with pkg.pr command ni https://pkg.pr.new/@onmax/nuxt-better-auth@29, node_modules/@onmax/nuxt-better-auth/dist/runtime/server/utils/auth.js path don't have:

import { useRuntimeConfig } from "nitropack/runtime";

instead of

import { useRuntimeConfig } from "#imports";

[onmax]

I retried this from a fresh /tmp repro and I could not reproduce the nitropack error on my side when using pkg.pr.new.

Please avoid the github:... install for this check. With pnpm 10, git-hosted packages can fail because they need a prepare step.

Could you try again with a clean reset and the pkg.pr.new package first?

rm -rf node_modules .nuxt
pnpm install https://pkg.pr.new/@onmax/nuxt-better-auth@295
pnpm dev

If it still fails, please paste:

• the exact install command you used
• the full new error output