fix(auth): preserve nuxthub db package imports in prerender builds

[onmax]

Before

Consumer build in node_modules/.cache/nuxt/.nuxt/prerender/index.mjs:

import '../../../../../../../../@nuxthub/db/db.mjs';

Nitro rebases the bare @nuxthub/db specifier to a relative path that escapes the build dir, crashing prerender. Only reproduces when .nuxt/ lives inside node_modules/.cache/nuxt/ (real consumer builds). Reported against pkg.pr.new 9a4ad00, repro: jd-solanki/nuxthub-better-auth-repro@049505f.

Expected

Prerender keeps @nuxthub/db as a bare specifier — NuxtHub writes the physical node_modules/@nuxthub/db/db.mjs and resolves it at runtime.

Change

Mark @nuxthub/db external in Nitro config when hasHubDb, so Rollup stops trying to resolve the bare import during prerender bundling.

nuxt.hook('nitro:config', (nitroConfig) => {
  nitroConfig.externals ||= {}
  nitroConfig.externals.external ||= []
  if (!nitroConfig.externals.external.includes('@nuxthub/db'))
    nitroConfig.externals.external.push('@nuxthub/db')
})

• regression test (test/nuxthub-prerender-db-import.test.ts) that builds a postgresql fixture and asserts no ../../../../@nuxthub/db escaping path in prerender output.

Validation

• pnpm test test/nuxthub-prerender-db-import.test.ts
• pnpm lint, pnpm typecheck, pnpm exec nuxt-module-build build
• Against jd-solanki/nuxthub-better-auth-repro@049505f: prerender clears (build still fails later at the dummy-postgres migration — expected, unrelated)

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
nuxt-better-auth-docs	Ready	Preview, Comment	Apr 17, 2026 7:51am

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@onmax/nuxt-better-auth@305

commit: b434757

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Workers

The latest updates on your project. Learn more about integrating Git with Workers.

Status	Name	Latest Commit	Updated (UTC)
❌ Deployment failed View logs	better-auth	b434757	Apr 17 2026, 07:52 AM