How to use the cache

[Okeanos]

Taplo CLI has a --cache-path argument. This is presumably used as a location for caching (downloaded) schema files.

However, neither the help text nor the official documentation offer any further insights.

I would like to know:

• whether Taplo caches the schema files by default already (and if so, where?)
• how is the cache (path) supposed to be used? Some issues mention it isn't relevant for e.g. the format command.
• how is the cache handled internally, is there a time-out/LRU/size-limit logic? Do I manually have to manage the cache to ensure contents are up to date?
• what is actually cached?