Is there a way to disable the function name rule for overridden functions? For example

override fun _deserialize(...)

I know I can tag it with

@Suppress("FunctionName")

but it feels like I shouldn't have to since there's nothing I can do about the function name.

You can disable the rule. This will be fixed in version 1.0.1 which is coming soon. Or use the snapshot version. Please see docs.

Ahhh... sorry google took me to v0.50.0 docs