Wiring Prisma 7 into TanStack Start on Bun

TanStack Start, Prisma 7, and Bun fit together cleanly, but there are a handful of small decisions you want to get right before the code lands in production. This post is the list I'd want written down before starting. Highlights: Prisma 7 moved the runtime datasource into prisma.config.ts (the url = env(...) form in schema.prisma no longer works); @prisma/adapter-pg is the shortest path on Bun and turns connection behaviour into plain pg knowledge; the stash-on- globalThis singleton is non-nego