peters/horizon

What it solves

Horizon is a GPU-accelerated terminal board that replaces traditional tabbed or tiled terminals with an infinite 2D canvas. It eliminates the need to hunt through tabs by allowing users to place, resize, and group live sessions—including shells, AI agents, and browsers—on a single, persistent surface.

How it works

Horizon organizes work into color-coded Workspaces (clusters of panels with a shared working directory) placed on an infinite Canvas. Users can pan and zoom the canvas or use a command palette to jump between panels. The system supports various Panel types, including standard shells, SSH sessions, and dedicated integrations for AI coding agents. It uses the Alacritty terminal engine for high-performance emulation and persists all layouts, history, and sessions across app restarts.

Who it’s for

Developers and power users who manage multiple concurrent terminal sessions, remote hosts, and AI coding assistants and prefer a spatial organization of their workflow over traditional window management.

Highlights

• Infinite Canvas: A zoomable 2D surface with a minimap for spatial navigation of all active sessions.
• AI Agent Integration: First-class TUI support for agents like Grok, Claude Code, Gemini CLI, and others, including a live token usage dashboard.
• Live Browser Panels: Integrated Chromium, Firefox, or Safari automation where humans and AI agents share the same live page.
• Workspace Management: Group panels into color-coded clusters that can be auto-arranged (grid/rows/cols) or detached into separate OS windows.
• Git Integration: Built-in status panels that monitor workspace repositories for changes and diffs.
• Session Persistence: Automatic saving of canvas pan/zoom, panel layouts, and terminal history.
• On-device Speech Input: Opt-in, local dictation for terminals and browser pages.