horizon

Name: horizon
Author: peters

Verified

GPU-accelerated terminal board that puts all your sessions on an infinite canvas

705stars

28forks

Rust

Installation

# Add to your Claude Code skills
git clone https://github.com/peters/horizon

Getting Started

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Security ReportVerified

Last scanned: 8/14/2026

{
  "issues": [],
  "status": "PASSED",
  "scannedAt": "2026-08-14T05:37:17.384Z",
  "npmAuditRan": true,
  "pipAuditRan": true,
  "promptInjectionRan": true
}

README.md

Frequently Asked Questions

What is horizon?

horizon is an open-source ai agents skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by peters. GPU-accelerated terminal board that puts all your sessions on an infinite canvas. It has 705 GitHub stars.

Is horizon safe to use?

Yes. horizon passed SkillsLLM's automated security scan — a dependency vulnerability audit plus prompt-injection heuristics — with no high-severity issues. You can read the full report in the Security Report section on this page.

How do I install horizon?

Clone the repository with "git clone https://github.com/peters/horizon" and add it to your Claude Code skills directory (see the Installation section above).

What programming language is horizon written in?

horizon is primarily written in Rust. It is open-source under peters on GitHub, so you can review or fork the full source.

Are there alternatives to horizon?

Yes. SkillsLLM lists many other AI Agents skills you can browse and compare side by side. Open the AI Agents category from the badge at the top of this page, or use the Related Skills and comparison links further down to weigh horizon against similar tools.

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⚠️ Third-Party Software Notice

This skill is third-party open-source software developed and hosted independently on GitHub. SkillsLLM is an informational directory and does not control or maintain the underlying repository.

Any security checks, ratings, or warnings displayed by SkillsLLM are automated and limited in scope. They do not constitute a security certification or guarantee that the software is safe, error-free, or free from malicious code, vulnerabilities, compromised dependencies, or prompt-injection risks.

Review the source code, permissions, dependencies, and configuration before installing or running any third-party skill. Use is at your own risk. To the maximum extent permitted by applicable law, SkillsLLM is not liable for losses arising from third-party software.

Read the Terms of Service

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, 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.

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	Middle-mouse or Space+drag to pan. 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
`command`	Run an arbitrary command as a panel

Five minutes on the canvas

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

Ctrl+double-click empty canvas. A preset list appears. Pick Shell (or Grok, Claude, Browser, …). Shell and agent presets then ask for a working directory — that becomes the workspace cwd, and the first panel lands there.
Press Ctrl+Shift+N for another panel of the first preset (Shell by default), or Ctrl+Shift+K and type a preset alias (gb, cc, web, gc).
On the workspace header, click Rows, Cols, or Grid when you want structure, or Default to drag freely.
Press Ctrl+Shift+9 to fit the workspace into view. Press Ctrl+Shift+W to jump back to it without changing zoom.
Press Ctrl+Shift+K again. Type a workspace name, a panel title, @ for panels only, or > for presets and actions.
Close Horizon. Reopen it tomorrow — the session, layout, canvas pan/zoom, and terminal history are still there.

Once that loop is familiar, the rest is optional: New in the sidebar for an empty workspace, Ctrl+Shift+H for SSH/Tailscale hosts, the workspace Detach control for a dedicated window, a Browser panel for a live page, or Settings (Ctrl+Shift+,) to edit ~/.horizon/config.yaml with the canvas still visible behind it.

Highlights

Infinite Canvas

Pan and zoom freely. Place panels anywhere. A minimap in the corner keeps you oriented — click or drag it to jump.

Workspaces

Group related panels into color-coded workspaces. Auto-arrange with rows, columns, or grid — or drag freely. Detach a workspace into its own OS window.

Full Terminal Emulation

24-bit color, mouse reporting, scrollback, alt-screen, and Kitty keyboard protocol. Powered by the Alacritty terminal engine. Click a TUI (Grok, vim, less, …) and the click goes to the app; Shift+click still selects text.

Command Palette

Ctrl+Shift+K searches workspaces, panels, presets, and actions. Prefix > for presets and actions, @ for panels only. Selecting a panel pans the canvas to it.

AI Agent Panels

First-class Grok, Claude Code, Codex, OpenCode, Gemini CLI, KiloCode, and Pi integration. Session persistence and resume work where the CLI supports it. Title bars show a working indicator and, when a session is bound, its id. A live usage dashboard tracks token spend.

Live Browser

Run Chromium, Firefox, or Safari automation on the canvas. You and an agent share the same live page — navigate, inspect, click, fill, capture network traffic, then hand control back and forth.

Git Integration

A built-in git status panel watches the workspace repo. See changed files, inline diffs, and hunk-level detail without leaving the canvas.

Smart Detection

Click an OSC 8 hyperlink to open it. Ctrl+click a URL or file path under the cursor. Horizon sees what the terminal prints and makes it interactive.

Remote Hosts

Ctrl+Shift+H discovers hosts from SSH config and Tailscale. Search, filter, and connect. Type user@filter to override the SSH user. Connected sessions land in a Remote Sessions grid workspace.

Live Settings Editor

Ctrl+Shift+, opens the config as a side panel with YAML highlighting and live preview. Toggle light / dark / auto themes; changes apply to the canvas behind the editor.

Session Persistence

Close Horizon, come back tomorrow. Sessions, panel layouts, canvas pan/zoom, and terminal history restore as you left them. Ctrl+Shift+J switches boards. An opt-in setting can line attached workspaces into a horizontal row after restore.

Markdown Editor

Drop a .md file onto the canvas or create one from the palette. Split view with syntax highlighting and live preview, saved with Ctrl+Shift+S.

Speech Input

Opt-in, on-device dictation into terminals and browser pages. Hold a push-to-talk key (default F9) or use the title-bar mic. Nothing leaves the machine.

Audited Browser Automation

Agents discover one MCP browser contract automatically. Every action is correlated in a redacted audit trail. The horizon-browser CLI runs prompt jobs and repeatable JSON plans.

Install

Download (fastest)

Grab the latest release from Releases — no dependencies needed.

Platform	Raw binary	Surge installer
Linux x64	`horizon-linux-x64.tar.gz`	`horizon-installer-linux-x64.bin`	Extract and run, or use the installer for managed stable updates
macOS arm64	`horizon-osx-arm64.tar.gz`	`horizon-installer-osx-arm64.bin`	Extract and run, or use the installer for managed stable updates
macOS x64	`horizon-osx-x64.tar.gz`	`horizon-installer-osx-x64.bin`	Extract and run, or use the installer for managed stable updates
Windows x64	`horizon-windows-x64.exe`	`horizon-installer-win-x64.exe`	Run the raw binary directly, or use the installer for managed stable updates

Homebrew and other package-manager installs keep using the package manager's own upgrade flow. Horizon only offers the in-app update prompt for installs created by the Surge installer.

Homebrew

Stable releases are available through the peters/horizon tap on macOS and Linux x64:

brew install peters/horizon/horizon

If you prefer to add the tap explicitly first:

brew tap pete