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- Add @opennextjs/cloudflare and wrangler config (Smart Placement, Hyperdrive binding, observability). - Replace the global `db` with `getDb()`: one Hyperdrive-backed client per request on Workers (sockets can't cross requests), the DATABASE_URL client everywhere else. next-auth now builds its config per request. - Set `trustHost` so Auth.js accepts the Worker's hostname. - Pin Next to 16.3.x: the adapter 500s on 16.4 until opennextjs/opennextjs-cloudflare#1356 ships; Dependabot ignores 16.4+. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LcV53ESAdFnYAbNewkMuUD
`wrangler types` inlined ~16k lines of runtime types and, once the Worker had been built, referenced `.open-next/worker` (absent in CI). The only binding we add is HYPERDRIVE, so declare it by hand on top of the published types. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LcV53ESAdFnYAbNewkMuUD
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- getDb() checks for the Workers runtime explicitly: Hyperdrive per request there (errors now surface instead of silently falling back), DATABASE_URL everywhere else, including `next dev`. - Drop initOpenNextCloudflareForDev: nothing reads bindings under `next dev` any more, which also removes its startup race. - Local Hyperdrive reads CLOUDFLARE_HYPERDRIVE_LOCAL_CONNECTION_STRING_HYPERDRIVE from .env rather than a hard-coded connection string. - postgres.js: fetch_types: false (skip a round trip per request client). - Typed global for the dev client instead of an `as` cast; fetch the client once in getStravaAccessToken. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LcV53ESAdFnYAbNewkMuUD
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Sets the app up to run on Cloudflare Workers, with Postgres (Neon, for PostGIS later) behind Hyperdrive.
Why OpenNext and not vinext
npx vinext checkreports next-auth as incompatible (it relies on Next API route internals). Moving to better-auth is its own project, so this uses the@opennextjs/cloudflareadapter, which supports next-auth.Changes
wrangler.jsonc/open-next.config.ts: OpenNext Worker, Hyperdrive binding (HYPERDRIVE), Smart Placement (pages make several queries, so run near the DB), observability on.npm run preview/npm run deploy.getDb()replaces the globaldb: Workers can't reuse a socket from another request, so on Cloudflare each request gets its own client (keyed on itsExecutionContext). Tests, scripts and plainnext devkeep a singleDATABASE_URLclient.DATABASE_URLis now optional, since production uses the Hyperdrive binding.NextAuth(createAuthConfig)), so the Drizzle adapter uses the request's client.trustHost: true, because Auth.js otherwise rejects any non-Vercel host.~16.3.8: on 16.4, every dynamic route 500s withUnexpected loadManifest(/.next/server/preview-props.json)([BUG] UnexpectedloadManifest(/.next/server/preview-props.json)call on Next.js 16.4 canary opennextjs/opennextjs-cloudflare#1355, fix in #1356). Dependabot ignoresnext >= 16.4until then.@cloudflare/workers-types; the one binding we add (HYPERDRIVE) is declared insrc/types/cloudflare-env.d.ts. Update it ifwrangler.jsoncgains bindings.Not done yet (needs accounts)
wrangler hyperdrive create, replacing the placeholder id inwrangler.jsoncAUTH_SECRET,STRAVA_CLIENT_ID,STRAVA_CLIENT_SECRETTest plan
next buildopennextjs-cloudflare build, thenwrangler devagainst local Postgres:/,/recentmap,/api/auth/providers,/api/auth/sessionreturn 200; tRPC returns 401 without a session🤖 Generated with Claude Code
https://claude.ai/code/session_01LcV53ESAdFnYAbNewkMuUD