u/Top-Kitchen-6635

Hey r/bun. Author here. I've been building a full application framework on Bun and wanted to share it with the people who'll actually know what I'm talking about.

OneBun is what I wished existed when I moved from NestJS/Node to Bun: DI container, module system, decorators — the architecture patterns that make large codebases manageable — but native on Bun, not ported from Node.

Highlights:

• Full DI with constructor injection, module system, guards, exception filters
• ArkType validation → runtime checks + auto-generated OpenAPI 3.1 (no DTO classes needed)
• Prometheus metrics (@Timed, @Counted) + OpenTelemetry tracing (@Span) built in
• Drizzle ORM, Redis cache, NATS queues — first-party packages
• Zero build step, runs TS directly
• Uses native Bun APIs: WebSocket, SQLite, Redis, router, file I/O — no Node.js compatibility shims
• ~2x faster than NestJS+Fastify on Node in CI benchmarks
• 2500+ tests, ~90% coverage, full suite in ~14s

It's opinionated by design — one ORM, one queue, one validation library. Less choice, more integration.

v0.3.x, pre-1.0, just me building it. Looking for early adopters.

Specifically curious what r/bun thinks about:

• Which native Bun APIs would you want deeper integration with? (I already use Bun.serve, WebSocket, SQLite, Redis, file I/O — what's missing?)
• Thoughts on the Effect.ts trade-off — I use it internally for DI/resource management but keep it out of user-facing API. Good call or should it be exposed?

https://github.com/RemRyahirev/onebun | https://onebun.dev