v0 apps, public env vars, and Supabase auth in Vercel
highUpdated Oct 14, 2026
Set credentials as Secret environment variables. Vercel's docs say you cannot convert a Secret to Config in place.
Fix for Vercel
Set credentials as Secret environment variables. Vercel's docs say you cannot convert a Secret to Config in place. Delete and recreate it if you stored a secret as Config by mistake, and rotate the key that was readable.
The five-minute check, the other platforms, and the agent prompt are on the full guide. More Vercel fixes are on the Vercel page.