Horizon swaps tabs for infinite canvas

This feels like a real power-user re-think of the terminal, not just a skin over tabs. If Horizon stays fast and the agent/session plumbing holds up, it could be the rare terminal UI that actually improves how multi-session work gets managed.

• –The repo pitches persistent workspaces, quick navigation, Git status, remote host discovery, and agent panels, which makes it more like a command center than a plain emulator. [GitHub](https://github.com/peters/horizon)
• –GPU acceleration is the right bet for an infinite canvas, because pan/zoom and dense layouts need to stay instant or the whole metaphor collapses.
• –The AI-agent angle is the differentiator: Claude Code, Codex, and OpenCode support turns the canvas into a multi-session control room.
• –The tradeoff is cognitive load. Spatial layouts help if you run lots of shells at once, but they can feel like overkill for anyone who lives in a single terminal pane.
• –Being open source in Rust gives it credibility with performance-minded developers who want local control and hackability.