Multitui is a macOS app factory that generates individual terminal apps for TUI programs, with optional sandbox. Create dedicated native apps for claude code, codex, gemini, lazygit, harlequin, or any TUI.
I made Multitui to control the sandbox of coding agents easily without changing my dev environment (no special container or VM). There's no configuration required in your local dev environment... just launch ClaudeCode.app instead of claude in your general terminal. Containers and VMs can be useful, but I always have a bunch of projects going and those solutions feel heavy.
Multitui creates single-purpose macOS apps for any terminal app, with optional sandbox. It uses the built-in macOS sandbox-exec along with log monitoring to give you an easy UI to manage rules, see what's being blocked, and add rules as you observe files that need to be allowed.
The apps you create are highly customizable and provide many native macOS integrations (document-based app model, Finder integration, global shortcut, etc). It's built with Swift, so it's fast and lightweight.
I also like the idea of TUIs being first-class apps, like what Omarchy did on linux. It helps me context-switch better than cycling through ten similar-looking tabs in Ghostty.
It's free in beta and free for personal use forever!
This is exactly what vibe coding needs - the sandbox approach is smart. Been seeing too many people run coding agents with full system access, not realizing what can be exfiltrated. The network sandboxing idea for preventing secrets theft would be huge. Most security issues I've seen in AI-generated code aren't runtime vulns - they're leaky APIs, hardcoded creds, or packages that phone home.
Congrats on the launch — love the idea of giving coding agents a controlled execution environment. One question from a standards/consistency perspective: how granular can the sandbox rules be? Do you allow defining reusable rule sets or patterns for file access, so the agent behaves consistently across different projects?
Launching ClaudeCode.app instead of claude is such a clean workflow. Seeing sandbox-exec blocks and adding rules as you go feels like the right balance. Does Multitui ship with presets like repo-only writes and no-network? Safe defaults make this easy to trust.
Congrats on the launch — love the sandboxed TUI app factory approach on macOS.
