Horizon is a GPU-accelerated terminal board that puts all your sessions
on an infinite canvas. Organize, pan, zoom, and never lose a terminal again.

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Why Horizon?

Tabbed terminals hide your work. Tiled terminals box you in. Horizon gives you a canvas — an infinite 2D surface where every terminal lives as a panel you can place, resize, and group however you want.

Think of it as a whiteboard for your terminal sessions. Keep your frontend, backend, logs, and AI agents all visible at once — across multiple color-coded workspaces — and navigate between them with a minimap.

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Highlights

Infinite Canvas Pan and zoom freely across a boundless workspace surface. Place terminals anywhere. A minimap in the corner keeps you oriented — click it to jump.	Workspaces Group related panels into color-coded workspaces. Auto-arrange with five layout modes — rows, columns, grid, stack, cascade — or drag panels freely.
Full Terminal Emulation 24-bit color, mouse reporting, scrollback, alt-screen, and Kitty keyboard protocol. Powered by the Alacritty terminal engine — the same one behind the fastest terminal on the planet.	AI Agent Panels First-class Claude Code and Codex integration. Sessions persist and auto-resume. A live usage dashboard tracks token spend across agents.
Git Integration A built-in git status panel watches your repo in the background. See changed files, inline diffs, and hunk-level detail — no context switching.	Smart Detection Ctrl+click a URL to open it. Hover a file path and click to jump to it. Horizon sees what your terminal prints and makes it interactive.
Remote Hosts Ctrl+Shift+H opens a fast overlay that discovers hosts from SSH config and Tailscale. Search, filter, and connect instantly. Type user@filter to override the SSH user. Connected sessions are grouped into a Remote Sessions grid workspace.	Live Settings Editor Open the config with Ctrl+Shift+, — a side panel with YAML syntax highlighting and live preview. Every change applies instantly to the canvas behind it.
Session Persistence Close Horizon, come back tomorrow. Your workspaces, panel positions, scroll positions, and terminal history are restored exactly as you left them.	Markdown Editor Drop a .md file onto the canvas or create one from the command palette. Split view with syntax highlighting and live preview, saved with Ctrl+Shift+S.

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Install

Download (fastest)

Grab the latest binary from Releases — no dependencies needed.

Platform	Asset
Linux x64	horizon-linux-x64.tar.gz	Extract, chmod +x, run
macOS arm64	horizon-osx-arm64.tar.gz	Extract, chmod +x, run
macOS x64	horizon-osx-x64.tar.gz	Extract, chmod +x, run
Windows x64	horizon-windows-x64.exe	Download and run

Build from source

git clone https://github.com/peters/horizon.git
cd horizon
git lfs install
git lfs pull
cargo run --release

Requires Git LFS for bundled assets and Rust 1.88+. Linux needs system headers for GPU rendering — see AGENTS.md for per-distro install commands.

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Quick Tour

Keyboard Shortcuts

All app shortcuts use Ctrl+Shift to avoid conflicts with shell programs (Ctrl+C, Ctrl+K, Ctrl+B, etc.) and OS-level bindings. They are configurable through the shortcuts: block in your config file and editable from the built-in settings panel. Duplicate or overlapping bindings are rejected, including near-conflicts such as Ctrl+B and Ctrl+Shift+B.

Shortcut	What it does
Ctrl+Shift+K	Quick-navigate to any workspace
Ctrl+Shift+N	New terminal panel
Ctrl+Shift+H	Open Remote Hosts overlay
Ctrl+Shift+B	Toggle sidebar
Ctrl+Shift+U	Toggle HUD
Ctrl+Shift+M	Toggle minimap
Ctrl+Shift+A	Align visible attached workspaces into a horizontal row
Ctrl+Shift+,	Open settings editor
Ctrl+Shift+0	Reset canvas view
Ctrl+Shift+Plus	Zoom canvas in
Ctrl+Shift+Minus	Zoom canvas out
F11	Fullscreen the active panel
Escape	Exit active panel fullscreen
Ctrl+Shift+F11	Toggle window fullscreen
Ctrl+Shift+S	Save the active Markdown editor

Modifier-Assisted Mouse Actions

Interaction	What it does
Ctrl+Scroll	Zoom around the cursor
Ctrl+Click	Open URL or file path under cursor
Ctrl+double-click canvas	Create a new workspace
Ctrl+double-click inside a workspace	Add a new terminal

_{On macOS, substitute Cmd for Ctrl.}

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Configuration

The settings editor writes back to the same config file Horizon loaded. By default that is ~/.horizon/config.yaml, and config.yml is also supported when discovered or passed explicitly. You can define workspaces, panel presets, feature flags, and keyboard shortcuts:

shortcuts:
  command_palette: Ctrl+Shift+K
  new_terminal: Ctrl+Shift+N
  open_remote_hosts: Ctrl+Shift+H
  toggle_sidebar: Ctrl+Shift+B
  toggle_hud: Ctrl+Shift+U
  toggle_minimap: Ctrl+Shift+M
  align_workspaces_horizontally: Ctrl+Shift+A
  toggle_settings: Ctrl+Shift+Comma
  reset_view: Ctrl+Shift+0
  zoom_in: Ctrl+Shift+Plus
  zoom_out: Ctrl+Shift+Minus
  fullscreen_panel: F11
  exit_fullscreen_panel: Escape
  fullscreen_window: Ctrl+Shift+F11
  save_editor: Ctrl+Shift+S

workspaces:
  - name: Backend
    cwd: ~/projects/api
    panels:
      - kind: shell
      - kind: claude
      - kind: git_changes

  - name: Frontend
    cwd: ~/projects/web
    panels:
      - kind: shell
      - kind: shell

presets:
  - name: Shell
    alias: sh
    kind: shell
  - name: Claude Code
    alias: cc
    kind: claude
  - name: Git Changes
    alias: gc
    kind: git_changes

# Optional: disable the default attention feed
features:
  attention_feed: false

Use key names like Plus, Minus, Comma, Escape, and F11 in YAML instead of punctuation-only shortcut components such as Ctrl++.

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Built With

Rust	Edition 2024, safe and fast
eframe / egui	Immediate-mode UI framework
wgpu	GPU rendering — Vulkan, Metal, DX12, OpenGL
alacritty_terminal	Battle-tested terminal emulation
Catppuccin Mocha	Dark color palette

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Contributing

See AGENTS.md for development setup, architecture, coding standards, and CI requirements. Release instructions live in docs/release-flow.md. Manual smoke-test plans live under docs/testing, including the workspace close smoke test.

cargo fmt --all -- --check
cargo test --workspace
cargo clippy --all-targets --all-features -- -D warnings

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_{MIT License}