Horizon

Horizon is a GPU-accelerated terminal board that puts all your sessions on an infinite canvas. Workspaces group related panels. Presets launch them. The command palette jumps you there. Close the app — the board is still there tomorrow.

The model · Five minutes · Highlights · Install · Shortcuts · Config · Browse · VNC · Browser reference · Speech

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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, agent, browser, VNC desktop, and editor lives as a panel you can place, resize, and group.

Think of it as a whiteboard for live sessions, with a structured workflow on top: color-coded workspaces, preset panels, a command palette, and fit-to-workspace whenever you want a clean overview.

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The model

Horizon has five nouns. Everything else is a shortcut, a preset, or a panel kind.

Noun	What it is	How you use it
Canvas	The infinite 2D surface	Drag empty canvas or swipe with two fingers to pan. Pinch or Ctrl+scroll to zoom. Minimap to jump.
Workspace	A color-coded cluster with a shared working directory	Ctrl+double-click the canvas and pick a preset, or click New in the sidebar. Arrange with Default (free), Rows, Cols, or Grid. Detach it to its own window.
Panel	One live surface inside a workspace	Shell, SSH, coding agent, browser, markdown, git, or usage.
Preset	A named template for a new panel	Command palette, Ctrl+double-click, or Ctrl+Shift+N (first preset).
Session	A saved board	Close Horizon and come back. Ctrl+Shift+J switches between saved boards.

A typical board looks like this:

Session
└── Canvas
    ├── Workspace "Backend"     cwd: ~/projects/api
    │     ├── Shell
    │     ├── Grok
    │     ├── Browser  →  http://127.0.0.1:3000
    │     └── Git Changes
    └── Workspace "Frontend"    cwd: ~/projects/web
          ├── Shell
          └── Claude

Workspaces stay visible. There are no hidden tabs. If something is off-screen, pan, zoom, fit, or search — do not hunt through a tab strip.

Panel kinds

Kind	What you get
shell	Login shell in the workspace directory
ssh	Remote shell — usually from the Remote Hosts overlay
grok · claude · codex · open_code · gemini · kilo_code · pi	First-class coding-agent TUIs, with session resume where the CLI supports it
browser	Live Chromium, Firefox, or Safari on the canvas, shared with agents
editor	Markdown split view (syntax + preview)
git_changes	Changed files, diffs, and hunks for the workspace repo
usage	Token spend across agent panels
upkeep	Read-only board of an Upkeep agent: next run, the last 24 hours of runs, and its dependency pull requests by state. A row opens its pull request in a browser panel. command names the status file; see Upkeep
command	Run an arbitrary command as a panel
device	Native VNC view of a loopback desktop, or of a remote desktop reached through an SSH tunnel (the host's key must already be trusted, for example by opening it over SSH once). Read-only until you turn Interact on, which sends your mouse and keyboard to that desktop

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Five minutes on the canvas

You do not need a config file to start. Launch Horizon, then: