is there a way I can set all map schema :closed by default? so that don't need to specify individually.

I don't think there is, however, you could gather up all your schemas and map over them with malli.utils/closed-schema to recursively close them.

That may work

You could copy the -map-schema definition and make your own -closed-map-schema https://github.com/metosin/malli/blob/master/src/malli/core.cljc#L616 so you could write: [:closed-map [:xyz string?]] not sure if that's worth it vs just typing {:closed true} though

thanks guys, sounds good, cheers

@siddharthjain.in or better: create a PR that allows m/-map-schema to take :closed and then say:

(m/-map-schema {:naked-keys true, :closed true})