There's an open issue to add some kind of function annotation+errors for functions which require you to call a cleanup function.

The discussion has had a lot of back and forth and they haven't really settled on a desirable solution yet, but it's something they're hoping to add.

https://github.com/ziglang/zig/issues/782

I work in games with C++ and we already do so much manual management and initialization+teardown functions that lack of RAII isn't a deal-breaker. Though I'd definitely prefer it if there was something either well-enforced or automatic.