Mole looks great — I hadn't seen it before. Go is a solid choice for this kind of tool.

  The main differences from onClean:

  - Mole is free/open-source (MIT), onClean is $5.99 one-time. If free matters most, Mole wins there.
  - onClean's scanning engine is written in Zig with direct POSIX syscalls — different tradeoff (smaller
  binary, no GC pauses during large scans).
  - onClean has first-class support for developer-specific caches (Xcode DerivedData, nested node_modules,
   Cargo, CocoaPods, Docker) which tend to be the biggest space hogs for devs.
  - We also have a menu bar helper for scheduled cleaning and a recommendations system for stale
  downloads/screenshots.

  Honestly, the more tools in this space the better — CleanMyMac charging $40/yr for cache deletion has
  gone on long enough. Thanks for sharing the link.