Hamr

A fast, extensible desktop launcher for Linux.

Hamr learns from your usage patterns to surface what you need, when you need it. Type a few characters to launch apps, calculate math, search files, access clipboard history, and more.

Features

• Frecency ranking - Results sorted by frequency + recency
• Learned shortcuts - Type "q" to find QuickLinks if that's how you found it before
• Fuzzy matching - Fast, typo-tolerant search powered by nucleo
• Smart suggestions - Context-aware suggestions based on time and usage
• Extensible plugins - JSON protocol, any language (Python, Bash, Go, Rust)
• Live updates - Plugins emit real-time updates without refreshing the list
• Rich UI - Forms, cards, sliders, gauges, preview panels, grid browsers

Installation

Quick Install (Linux x86_64)

curl -fsSL https://hamr.run/install.sh | bash

This downloads the latest release binaries, installs to ~/.local/bin, copies essential plugins, and sets up systemd services.

Dependencies: GTK4 4.20+, gtk4-layer-shell, Python 3.9+

Manual Download

wget https://github.com/Stewart86/hamr/releases/latest/download/hamr-linux-x86_64.tar.gz
tar -xzf hamr-linux-x86_64.tar.gz
cd hamr-linux-x86_64
cp hamr hamr-daemon hamr-gtk hamr-tui ~/.local/bin/
cp -r plugins ~/.local/bin/
hamr install

Compositor Support

Compositor	Status	Notes
Hyprland	✅ Supported	Full functionality with layer-shell
Niri	✅ Supported	Full functionality with layer-shell
Sway	✅ Supported	Works with layer-shell protocol
KDE Wayland	✅ Supported	Requires layer-shell support
GNOME Wayland	❌ Not Supported	No layer-shell protocol support
X11	❌ Not Supported	Wayland-only application

Installer Flags:

Flag	Description
--check	Dry-run mode: show what would be installed without making changes
--yes	Assume yes for all prompts (non-interactive mode)
--reset-user-data	Reset user configuration and plugins (backup created)

Build from Source

Requires Rust 1.88+, GTK4 4.20+, gtk4-layer-shell.

# Install dependencies (Arch)
sudo pacman -S gtk4 gtk4-layer-shell rust python

# Install dependencies (Fedora)
sudo dnf install gtk4-devel gtk4-layer-shell-devel rust python3

# Install dependencies (Ubuntu/Debian)
sudo apt install libgtk-4-dev gtk4-layer-shell-dev rustc cargo python3

# Clone and build
git clone https://github.com/stewart86/hamr
cd hamr
./install.sh

# Or build manually
cargo build --release
mkdir -p ~/.local/bin
cp target/release/{hamr,hamr-daemon,hamr-gtk,hamr-tui} ~/.local/bin/
hamr install

NixOS / Nix

# Try without installing
nix run github:stewart86/hamr

# Install to profile
nix profile install github:stewart86/hamr

Or add to your flake:

{
  inputs.hamr.url = "github:stewart86/hamr";
  # ...
  nixpkgs.overlays = [ hamr.overlays.default ];
  environment.systemPackages = [ pkgs.hamr ];
}

Arch Linux (AUR)

# Pre-built binary (recommended - faster install)
paru -S hamr-bin

# Or build from source
paru -S hamr

Quick Start

hamr                    # Start launcher (auto-starts daemon)
hamr toggle             # Toggle visibility
hamr plugin clipboard   # Open specific plugin
hamr status             # Check daemon status

Compositor Setup

Hyprland (~/.config/hypr/hyprland.conf):

exec-once = hamr
bind = $mainMod, SPACE, exec, hamr toggle
bind = $mainMod, V, exec, hamr plugin clipboard

Niri (~/.config/niri/config.kdl):

spawn-at-startup "hamr"

binds {
    Mod+Space { spawn "hamr" "toggle"; }
    Mod+V { spawn "hamr" "plugin" "clipboard"; }
}

Systemd (optional):

# The installer sets up systemd services (recommended for auto-start on login)
hamr install
systemctl --user start hamr-gtk

# Without systemd, just run:
hamr

Built-in Plugins

Plugin	Description
apps	Application launcher with categories
shell	Execute shell commands
calculate	Calculator with currency, units, temperature
clipboard	Clipboard history with search
power	Shutdown, reboot, suspend, logout

Additional plugins available: bitwarden, dictionary, emoji, files, quicklinks, snippets, totp, weather, wifi, youtube.

Prefix Shortcuts

Prefix	Function	Prefix	Function
~	File search	;	Clipboard history
/	Actions & plugins	!	Shell history
=	Calculator	:	Emoji picker

Prefixes are configurable in ~/.config/hamr/config.json.

Documentation

• Installation - Full installation guide
• Configuration - All config options
• Logging - Log paths, env vars, debugging
• Theming - Material Design 3 colors, matugen/pywal
• Troubleshooting - Common issues and solutions
• Plugin Development - Create your own plugins
• API Reference - Plugin protocol specification
• Architecture - System design and crate structure

Development

# Build
cargo build

# Run tests
cargo test

# Run with debug logging
RUST_LOG=debug cargo run -p hamr-daemon

# Test a plugin
cargo run -p hamr -- test shell "ls -la"

Architecture

hamr-cli     hamr-gtk     hamr-tui
    \           |           /
     \          |          /
      +----JSON-RPC 2.0---+
               |
          hamr-daemon
               |
          hamr-core
               |
    +---------+---------+
    |         |         |
  search   plugins   frecency

• hamr-core: Platform-agnostic core (search, plugins, frecency, indexing)
• hamr-daemon: Socket server wrapping core
• hamr-gtk: GTK4 native UI with layer shell
• hamr-tui: Terminal UI for headless use
• hamr-cli: Command-line interface

Contributing

Contributions welcome! Please read the Architecture Guide and Agent Guidelines before submitting PRs.

License

MIT License - see LICENSE for details.