linux-system-optimisation

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".

Run a system benchmark tailored to the detected hardware on a Linux desktop. CPU (sysbench / stress-ng), GPU (glmark2 / vkmark / clpeak — chosen by GPU vendor), disk I/O (fio against the benchmark folder's filesystem), memory (sysbench memory + mbw), and a quick desktop-responsiveness probe. Saves timestamped JSON + Markdown summary to the user-defined benchmark folder. Triggers on "benchmark my system", "run benchmark", "rebench", or as a follow-up to `onboard`.

Analyse disk fill on a Linux desktop and surface where the space actually went. BTRFS-aware — reports real free space (`btrfs filesystem usage`), unallocated vs allocated, snapshot weight (`btrfs subvolume list` + size estimates), and compression ratio (`compsize`). For ext4/xfs/zfs, falls back to `df -hT` + `du`-based hot-spot detection. Triggers on "where did my disk space go", "check disk usage", "btrfs free space", "df is lying".

Find duplicate files (or specifically large duplicates) under a path on Linux, using `rmlint` (preferred) or `fdupes` / `jdupes` as a fallback. Reports size-ranked groups, total reclaimable bytes, and writes a delete script that the user can review before running. Does NOT auto-delete. Triggers on "find duplicate files", "dedupe my downloads", "what duplicates do I have".

First-run setup for linux-system-optimisation. Detects the machine's hardware (CPU, GPU, RAM, storage type, kernel, distro, DE, display server), asks the user where to store benchmark results (default ~/linux-system-optimisation/benchmarks/), installs missing benchmark tools, then runs the first tailored benchmark via the `benchmark` skill. Triggers on "set up linux-system-optimisation", "first run", or any optimise/benchmark request when no config exists.

Read the latest benchmark results from the linux-system-optimisation benchmark folder, then propose and apply tuning — CPU governor + EPP, power-profiles-daemon profile, GPU power profile (NVIDIA / AMD / Intel vendor-specific), per-disk I/O scheduler, swappiness, vm.* sysctls, transparent hugepages, zswap/zram. Shows a before/after diff before applying. Persistent changes (/etc/sysctl.d, systemd units) require explicit confirmation; runtime-only changes apply directly. Triggers on "optimise my system", "tune based on benchmark", "apply optimisations".

Find and (on confirmation) remove the most common dev-environment space sinks on a Linux desktop — Python virtualenvs (.venv / venv / env), Node.js node_modules, Rust target/, Java target/build/, Go pkg/mod cache, Docker dangling images/volumes, and language-tool caches (pip, npm, yarn, pnpm cache). Prioritises stale ones (mtime > N days) and shows reclaimable bytes per category before any deletion. Triggers on "clean dev clutter", "prune venvs", "find old node_modules", "clear pip cache".