Choose any installed macOS application to open the items currently selected in your file manager.
The frontmost application is checked at runtime: when it's a supported file manager (currently Finder or Bloom), the selection is read from there. Finder is the fallback in every other case, so the command keeps working from any context.
Implement the FileManagerProvider interface in src/file-managers/types.ts
and register the new class in src/file-managers/registry.ts. Each provider
needs a display name, the app's bundle identifier, and a method that returns
the selected POSIX paths (typically via runAppleScript).