Compatibility

Every ✅ row has an integration test in packages/platform/test that boots a real Nest app on the adapter.

NestJS features

Feature	Status
Routing, params, wildcards, @All, HEAD → GET fallback	✅
@Body / @Query / @Param / @Headers / @Ip / @Req / @Res / @Next	✅
JSON + urlencoded parsing, rawBody, bodyParser: false, useBodyParser('text' | 'raw'), 413 limits	✅
Exception filters, 404 / 500 shapes identical to Express	✅
Nest middleware (MiddlewareConsumer, forRoutes, exclude, method-scoped), app.use(), next(err)	✅
Global prefix with exclude; URI / header / media-type / custom versioning	✅
CORS (app.enableCors)	✅
@Redirect, @Header, @HttpCode, res.cookie() / clearCookie(), setCookie	✅
Server-Sent Events with disconnect detection	✅
StreamableFile, manual res.write() streaming	✅
Static assets with ETag / Last-Modified / 304	✅
View engines: ejs, hbs, pug, custom render()	✅
httpsOptions, forceCloseConnections, return503OnClosing, graceful shutdown	✅
Unix socket listen	✅
Security hooks (useSecurityHeaders, enableCsrfProtection)	✅ via AbstractHttpAdapter
WebSocket gateways	⏳ planned as @nestbun/ws
Multipart / @UploadedFile()	⏳ planned

Ecosystem packages

Package	Status
@nestjs/testing	✅ createNestApplication(new BunAdapter())
@nestjs/swagger	✅ UI, JSON, YAML and assets
cors	✅ used internally
@nestjs/serve-static	⚠️ untested; use useStaticAssets
@nestjs/platform-socket.io, @nestjs/platform-ws	❌ attach to a Node server; wait for @nestbun/ws
supertest	❌ use adapter.fetch()
multer / @nestjs/platform-express interceptors	❌ Express-only
Arbitrary Express middleware	⚠️ see Differences from Express

Found something missing? Open an issue with a minimal controller.