neonfetch

Fast synthwave system information for Linux terminals, written in Zig.

neonfetch is a lightweight neofetch-style CLI focused on startup speed, clean alignment, and a retro 80s neon look. It reads system data directly from /proc, /sys, /etc/os-release, and environment variables without spawning helper commands.

Preview

micqdf@hypr-nix
retro terminal telemetry

          ▗▄▄▄       ▗▄▄▄▄    ▄▄▄▖           OS         NixOS 25.11 (Xantusia)
          ▜███▙       ▜███▙  ▟███▛           Host       B650M GAMING PLUS WIFI
           ▜███▙       ▜███▙▟███▛            Kernel     Linux 6.19.9-zen1
            ▜███▙       ▜██████▛             Uptime     20h 50m
     ▟█████████████████▙ ▜████▛     ▟▙       Packages   1287 (nix-system), 451 (nix-user), 4 (flatpak-system), 2 (flatpak-user)
    ▟███████████████████▙ ▜███▙    ▟██▙      Shell      fish
           ▄▄▄▄▖           ▜███▙  ▟███▛      Display    (LG ULTRAWIDE): 2560x1080 in 29", 60 Hz [External]
          ▟███▛             ▜██▛ ▟███▛       Display    (27E1QA): 2560x1440 in 27", 60 Hz [External]
         ▟███▛               ▜▛ ▟███▛        Display    (VG271U M3): 2560x1440 in 27", 60 Hz [External]
▟███████████▛                  ▟██████████▙  WM         Hyprland
▜██████████▛                  ▟███████████▛  Theme      Breeze-Dark [GTK3]
      ▟███▛ ▟▙               ▟███▛           Icons      breeze-dark [GTK3]
     ▟███▛ ▟██▙             ▟███▛            Font       Noto Sans 10 [GTK3]
    ▟███▛  ▜███▙           ▝▀▀▀▀             Cursor     Bibata-Modern-Ice (24px)
    ▜██▛    ▜███▙ ▜██████████████████▛       Terminal   tty
     ▜▛     ▟████▙ ▜████████████████▛        CPU        AMD Ryzen 7 7700 (16) @ 5.26 GHz
           ▟██████▙       ▜███▙              GPU        RX 5700 XT RAW II [Discrete]
          ▟███▛▜███▙       ▜███▙             GPU        Raphael [Integrated]
         ▟███▛  ▜███▙       ▜███▙            Memory     21.86 GiB / 30.47 GiB (71%)
         ▝▀▀▀    ▀▀▀▀▘       ▀▀▀▘            Swap       1.73 GiB / 31.23 GiB (5%)
                                             Disk       (/): 0.00 GiB / 15.23 GiB (0%)
                                             Disk       (/mnt/ssd2): 319.58 GiB / 931.51 GiB (34%)
                                             Disk       (/nix): 1.25 TiB / 1.79 TiB (69%)
                                             Local IP   192.168.0.20
                                             Locale     en_GB.UTF-8

Features

• Native Zig binary with no runtime dependencies.
• Fast data collection with no shell-outs.
• Synthwave ANSI color output with NO_COLOR support.
• Linux system details: OS, host, kernel, uptime, packages, shell, displays, WM, GTK theme, icons, font, cursor, terminal, CPU, GPUs, memory, swap, disks, local IP, and locale.
• GPU model lookup from PCI IDs when available, with targeted fallbacks.
• Nix flake package, app, and dev shell.
• GitHub Actions CI and release binaries.

Install

Nix Flake

Run directly:

nix run github:OpenStaticFish/neonfetch

Install into a profile:

nix profile install github:OpenStaticFish/neonfetch

Use in a NixOS config:

{
  inputs.neonfetch.url = "github:OpenStaticFish/neonfetch";

  outputs = { nixpkgs, neonfetch, ... }:
    let
      system = "x86_64-linux";
    in
    {
      nixosConfigurations.my-host = nixpkgs.lib.nixosSystem {
        inherit system;
        modules = [
          {
            environment.systemPackages = [
              neonfetch.packages.${system}.default
            ];
          }
        ];
      };
    };
}

Use in Home Manager:

{ inputs, pkgs, ... }:

{
  home.packages = [
    inputs.neonfetch.packages.${pkgs.system}.default
  ];
}

Release Binary

Download a Linux tarball from the releases page, then place neonfetch somewhere on your PATH.

From Source

Requires Zig 0.15.2.

zig build -Doptimize=ReleaseFast
./zig-out/bin/neonfetch

Development

Run tests:

zig build test

Run locally:

zig build run

Enter a Nix dev shell:

nix develop

Build with Nix:

nix build

Environment

• NO_COLOR=1 disables ANSI styling.
• CLICOLOR_FORCE=1 forces color output.

CLI Options

neonfetch --help
neonfetch --version
neonfetch fields
neonfetch categories
neonfetch --no-logo --only cpu,gpu,memory,disk
neonfetch --hide packages,local_ip --no-palette
neonfetch --raw --only cpu
neonfetch --format json
neonfetch --format csv --only os,cpu,memory

• help or --help shows usage, commands, filters, and examples.
• version or --version prints the release version.
• fields or --list-fields lists filterable fields.
• categories or --list-categories lists filterable categories.
• --no-logo hides the distro logo.
• --no-header hides the user@host header.
• --no-palette hides the color palette footer.
• --plain or --no-color disables ANSI styling.
• --color forces ANSI styling.
• --raw prints only field values with no logo, header, or palette.
• --format <fmt> sets output format: pretty (default), raw, json, or csv.
• --only <list> shows only selected fields or categories.
• --hide <list> hides selected fields or categories.

Filter lists are comma-separated. Supported fields are os, host, kernel, uptime, packages, shell, display, wm, theme, icons, font, cursor, terminal, cpu, gpu, memory, swap, disk, local_ip, and locale. Supported categories are identity, system, desktop, hardware, package, usage, storage, and network. Names are case-insensitive; hyphens and spaces are treated like underscores. Aliases include ip, displays, gpus, and disks.

License

MIT