is there any reference on what each cache directory is used for? I split these in different CI caches (e.g. dependencies on a weekly cache, build cache only within a PR, etc), but my setup has some inefficiencies for "over caching" some things I'm not sure where they are used more generally, I'm interested on a "safe cache" (e.g. dependencies) and a "risky cache" (task outputs), where the former is highly unlikely to give invalid results based on a bad build conf, and the later might give incorrect results

https://docs.gradle.org/current/userguide/gradle_directories.html#gradle_user_home and https://docs.gradle.org/current/userguide/dependency_resolution.html#sub:ephemeral-ci-cache might be as far as what is documented.

the first one is too shallow, but there's some interesting stuff in the second, I didn't consider the additional readonly cache