The cli config supports specifying the PGLite extensions (the codegen uses PGLite as an in-memory light postgres), see this example: https://github.com/ilbertt/bun-sqlgen/tree/main/examples/wit....

You'll still probably have to manually override some column types using PG comments like: https://github.com/ilbertt/bun-sqlgen/blob/dee757ebc9c38aec7...

PGLite extensions: https://pglite.dev/extensions/#postgis