Hey, I'll do my best to answer your questions!

.1. Railway doesn't inherit and cannot recover env vars from other platforms. You'll need to redefine the env vars on Railway though the service variables tab.

2/3. Regarding the services, you can keep them on Manus or migrate, I'd recommend migration to Railway in order to avoid egress fees and to reduce latency. You can spin up services on Railway like Supabase or MySQL as you need them.

.4. VITE_* variables are build time variables so yes it is required to exist during build time

.5. That's up to you and how your app works, I'm not sure

Adding specifically to question 5: I would keep the Express/tRPC backend and migrate its authentication contract in staging before removing auth.me. Changing only the frontend adapter risks leaving the frontend and backend using different identities.

My suggested sequence:

1. Back up the databases and identify every caller of auth.me, the Manus OAuth callback, and every protected tRPC procedure. Check whether existing records use Manus user IDs or Supabase user IDs; do not assume these are interchangeable.

2. Make the backend accept and verify the Supabase access token, then derive the authenticated user from verified claims—not a user ID supplied by the browser. tRPC supports placing this identity in request context and checking it in protected procedures. See tRPC authorization and Supabase token verification.

3. Keep auth.me temporarily as a compatibility endpoint, returning the existing response shape from the verified Supabase identity and your application profile. Preserve role and ownership checks. Migrate its callers incrementally, then retire the endpoint if nothing needs it.

4. For browser-to-Supabase data access, review Row Level Security policies and test that user A cannot read or modify user B’s records. Never put service-role or secret keys in browser configuration. See Supabase RLS.

5. Test login, refresh, logout, protected API calls, role restrictions, and existing-record ownership before removing the Manus callback and related configuration.

Creating a new MySQL database alone will not replace Manus OAuth or migrate existing data. Given your existing Supabase integration, consolidating authentication there is a reasonable option, but the remaining database dependencies need a separate inventory.

Also, Vite’s VITE_* values are bundled at build time and exposed to the browser. Rebuild after changing them; keep database credentials and server secrets out of that prefix. See Vite environment variables.

This is an architecture recommendation based on your description; confirming the exact implementation requires inspecting the auth context and database mappings.

Thanks, this is very helpful. I agree that changing only the frontend auth adapter could create identity mismatch issues.

I’ll first inventory all auth.me callers, protected tRPC procedures, and whether existing records use Manus IDs or Supabase user IDs before changing the auth flow.

In my case, the core app data and lifecycle features already use Supabase direct repositories for profiles, jobs, applications, and status updates. The missing environment variables seem to come mainly from the legacy Manus OAuth / MySQL / tRPC path.

So I’m trying to decide whether the safer path is:

1. keep Manus hosting and use a custom domain for now, or
2. migrate the backend auth contract to Supabase Auth and then redeploy to Railway.

I’ll avoid creating a new MySQL database until I finish the auth and database dependency inventory.