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If t3code and cmux had a baby

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Clui

The CLI with a UI. Project-organized, thread-based terminal multiplexer for Claude Code, Codex CLI, and pi.

What is this?

Clui wraps terminal-native coding agents in a proper desktop app with project organization, conversation threads, and git workflow — without replacing the CLI itself. Each thread is a real terminal running its selected coding harness: claude, codex, or pi.

  • Projects with threads — organize coding sessions by project. Each thread gets its own branch/worktree.
  • Selectable coding harnesses — every thread persists its harness (claudeCode, codexCli, or pi), and Settings can choose the default for new threads.
  • Real terminal, not a chat UI — xterm.js + node-pty. What you see is what the underlying CLI actually outputs.
  • Resume anywhere — dormant threads save scrollback to SQLite. Claude threads resume via claude --resume, Codex threads via codex resume, and pi threads use a pi-compatible shared session store under Clui state.
  • Git workflow built in — branch management, commit, push, and PR creation from the sidebar.
  • Smart resource management — configurable cap on active terminals with LRU hibernation. Hundreds of dormant threads, near-zero resource cost.
  • Auto-update — the app checks for updates and lets you download + install from within the sidebar.

Status

Super alpha. This works, but expect bugs, rough edges, and breaking changes. If this inspires someone to build a proper polished product from the idea — that would be great.

Downloads

Grab the latest release from the Releases page.

Platform Format
macOS (Apple Silicon) .dmg
macOS (Intel) .dmg
Linux .AppImage
Windows .exe (NSIS installer)

Acknowledgments

Clui wouldn't exist without these projects:

  • t3code — Clui is a fork of t3code. The project sidebar, thread organization, branch/worktree management, and git workflow all originate from their work. Huge thanks to the Ping team for building such a solid foundation.
  • cmux — inspiration for the terminal multiplexer approach to managing multiple Claude sessions.

The core idea: t3code's project management UI is excellent, but the Agent SDK chat interface misses many features terminal-native agents already have. Rather than bridging the gap with abstraction layers, Clui runs the real CLIs directly inside thread terminals.

Tech Stack

  • Electron + React 19 + Vite
  • xterm.js + node-pty (terminal rendering)
  • SQLite (persistence via @effect/sql-sqlite-bun)
  • Effect (server framework)
  • TanStack Router/Query, Zustand, Tailwind CSS v4
  • WebSocket protocol between server and renderer

Development

bun install
bun dev          # starts server + web together

See CLAUDE.md for architecture details and development commands.

Future

Clui has started that multi-harness path with Claude Code, Codex CLI, and pi. Post-MVP, it aims to broaden support further — GitHub Copilot CLI, Aider, and other terminal-native agents.

Disclaimer

Clui is an independent, free, open-source project built for fun and personal use. It is not affiliated with, endorsed by, or sponsored by Anthropic, OpenAI, or any of the AI/CLI tool providers it wraps. All product names and trademarks are the property of their respective owners.

License

MIT

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