Support Matrix

Runtime

Runtime	Versions	Status
Bun	1.4.x	Supported (CI-tested, primary)
Bun	1.3.x	Best-effort (not tested in CI)
Node.js	22.x	Lambda only (via createLambdaHandler)

Database

Database	Versions	Status
PostgreSQL	14+	Supported (primary)
SQLite	3.x	Supported (via Bun native)
MySQL	8.x	Supported (via createMySqlDatabase)
Aurora Serverless v2 (Data API)	PostgreSQL 14+	Supported (via createAwsDataApiDatabase)

Libraries

Library	Versions	Status
Zod	4.x (zod 4 API)	Supported. Schemas written with the zod v3 API (zod@3 or the zod/v3 subpath) are refused with a warning by codegen, OpenAPI generation, and guren context — see Validation

Optional Services

Service	Versions	Required	Purpose
Redis	7.x	No	Queue, cache, session, broadcasting, rate limiting

Rendering Modes

Mode	Status
SSR	Supported (default for blog example)
SPA	Supported

CI Coverage

• Every PR: Bun 1.4.x, with Redis, PostgreSQL and MySQL services for the integration tests
• Nightly: Bun 1.4.x only, running the PR suite plus full runtime smoke tests against a real database, security audits, and an end-to-end scaffold-to-build check
• Release: Full validation before publish