doctor

filerepack doctor

Prints which binaries are on PATH and, for anything missing, OS-specific install commands (Homebrew / MacPorts on macOS, apt / dnf / pacman / zypper / apk on Linux, Chocolatey / winget / Scoop on Windows).

Only 7zz or 7z is required for archive and OOXML work. Everything else enables extra formats. doctor exits 1 if the required archiver is missing.

mp3packer and optivorbis are not packaged; doctor points at their GitHub releases.

Full notes: External tools. Python extras: Installation.