Skill

audit-installed

Audit installed packages on a Linux desktop and surface candidates for removal — manually-installed packages that haven't been used recently, orphaned dependencies, large packages, and unused Flatpak / Snap apps. Cross-references package-manager records with binary access times where available. Reports only — does not uninstall. Triggers on "what can I uninstall", "audit installed packages", "find unused programs".

npx claudepluginhub danielrosehill/claude-code-plugins --plugin linux-system-optimisation

Tool Access

This skill uses the workspace's default tool permissions.

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Reports candidates for cleanup across apt/dpkg, Flatpak, and Snap. The user decides what actually goes.

SKILL.md

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Last CommitMay 3, 2026

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Audit Installed

Reports candidates for cleanup across apt/dpkg, Flatpak, and Snap. The user decides what actually goes.

Sources

apt / dpkg (Debian/Ubuntu):
- Manually-installed: apt-mark showmanual
- Auto-installed orphans: apt autoremove --dry-run — already a good list of removable cruft.
- Largest packages: dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -nr | head -50 (sizes in KB).
Flatpak:
- flatpak list --app --columns=application,name,size,installation
- flatpak uninstall --unused --dry-run — surfaces unused runtimes (often big).
Snap:
- snap list plus snap list --all | awk '/disabled/{print $1, $3}' for old disabled revisions (Snap keeps two by default; clean with sudo snap remove --revision=<rev> <name>).
Last-used heuristics (best-effort — atime is often disabled):
- For each manually-installed package, find its binaries with dpkg-query -L <pkg> | grep -E '^/usr/(bin|local/bin|sbin)/' and check stat -c '%X %n' <bin> for atime. If noatime is on, skip this signal entirely and surface that to the user.
- For Flatpak apps, check the app's data dir mtime (~/.var/app/<app-id>/) — recent activity = recently used.

Suspicious / safe-to-suggest patterns

Suggest for removal:

Apt orphans from autoremove --dry-run.
Flatpak unused runtimes from --unused --dry-run.
Snap old disabled revisions.
Manually-installed packages whose binaries haven't been atime-touched in >180 days and the user isn't on noatime.
Multiple browsers / multiple media players / multiple PDF viewers — flag for the user to decide.

Do not suggest for removal:

Anything in package priority required, important, or standard (dpkg-query -Wf '${Priority}\t${Package}\n').
Kernels (linux-image-*, linux-headers-*) — separate cleanup tooling.
Build-essential, drivers, *-dev packages without explicit user consent.
Anything matching python3-*, lib* — usually pulled in by something else.

Output

Apt:
  Orphaned (autoremove): 14 packages, 312 MiB reclaimable
    sudo apt autoremove

  Top 10 largest installed:
    1.2 GiB  texlive-full
    480 MiB  android-platform-tools
    ...

  Manually installed but unused (atime > 180d):
    inkscape         last used 2024-08-12
    audacity         last used 2024-06-03
    ...

Flatpak:
  Unused runtimes: 4 (1.8 GiB)
    flatpak uninstall --unused

  Apps with no recent data activity (>180d):
    org.kde.krita    ~/.var/app last touched 2024-09-01

Snap:
  Old disabled revisions: 11 (3.4 GiB)
    sudo snap set system refresh.retain=2
    sudo snap remove --revision=<n> <name>   # per snap, see report

Kernel cleanup (separate, run with care):
  3 old kernels installed (~600 MiB). Use `sudo apt autoremove --purge` after verifying current kernel boots cleanly.

Notes

This skill is report only. No uninstall happens here. Output the exact commands the user can run.
Don't aggregate sizes across different package systems (apt MiB ≠ flatpak MiB ≠ snap MiB) — install-size accounting differs.
If mount | grep noatime shows the home filesystem is noatime, skip the atime heuristic entirely and say so.