cachyos-mcp

All-in-one Arch/CachyOS deep system control MCP server. It provides pacman + AUR package intelligence and system updates, and bundles the complete network-mcp and sysprobe-mcp tool sets so a single server gives Claude full visibility and control of the machine.

The two generic servers stay independently deployable (e.g. ship network-mcp to a headless server); cachyos-mcp just embeds their register() entry points.

Arch-specific tools

Package intelligence (read-only)

• search_all_repositories — repos and AUR in one call, unified & sorted (the anti-hallucination tool: see every available variant + votes + installed)

• search_system_repos, search_aur

• get_package_info, get_aur_info, get_package_dependencies

• query_installed_packages, which_package_owns, list_package_files

• list_orphans, list_explicit_packages

• check_updates (repos via checkupdates + AUR via paru — no root, safe)

• get_pacman_log, get_mirrorlist, list_kernels, get_package_cache_info

Mutating (needs SYSCONTROL_ALLOW_ACTIONS=1)

• system_update, install_packages, install_aur_package, clean_package_cache

• remove_packages — never auto-executed; returns the command only

Privilege handling

pacman needs root. Gated write tools run via passwordless sudo if available, otherwise they return the exact command for you to run (in Claude Code, prefix with !). To let Claude apply updates directly, add a sudoers rule, e.g.:

tom ALL=(root) NOPASSWD: /usr/bin/pacman, /usr/bin/paccache

Related MCP server: Promethean OS MCP

Bundled tool sets

• network: NetworkManager status, ip -j interfaces/routes, listening ports, throughput, firewall, mtr, DNS, TLS, port scan, whois, WireGuard, speedtest, packet capture …

• sysprobe: sensors, processes, systemd/journal, coredumps, dmesg, D-Bus, hardware inventory, brightness, power profile, CPU governor, audio, media, app launch, bluetooth, KDE control, session/power …

Run / register

SYSCONTROL_ALLOW_ACTIONS=1 uv run cachyos-mcp

claude mcp add cachyos -s user \
  -e SYSCONTROL_ALLOW_ACTIONS=1 \
  -- uv --directory "/home/tom/Projekte/SE Projects/cachyos-mcp" run cachyos-mcp

If you register cachyos-mcp you get everything; you typically would not also register network-mcp / sysprobe-mcp locally (only when deploying them elsewhere).

Requirements

pacman (always), and optionally pacman-contrib (checkupdates/paccache), paru (AUR), pactree/expac. Network/sysprobe optional tools as listed in their READMEs.