Launching today
lmux
Light Mac terminal that lets you unsend a Claude Code prompt
2 followers
Light Mac terminal that lets you unsend a Claude Code prompt
2 followers
Free, open-source Mac terminal on libghostty for running many Claude Code and Codex sessions. The sidebar shows which agent needs you. Sent a prompt to the wrong session? Hover it and click × to rewind Claude Code to just before it. 25 MB, idles near 0% CPU.
Free
Launch Team
Render Sandboxes: a computer for every agentGive every agent its own machine. Starts in under a second
Promoted
Hi Product Hunt, I'm Soohwan, an ML engineer in Seoul.
My day is a pile of Claude Code and Codex sessions running side by side. I used cmux for that and liked the layout, but it was more app than I needed, so I wrote a smaller one for myself. lmux borrows cmux's sidebar layout. It isn't a fork and has no cmux code in it.
What's different:
You can take a prompt back. Sent something to the wrong Claude Code session? Hover it and click ×. Claude Code rewinds to just before that prompt, same session, no restart. Files it already changed stay changed. ✎ does the same and puts your text back to edit.
It's light. 25 MB, no network calls. On my M4 Pro it idles near 0% CPU with 20 workspaces open; cmux 0.65.2 sat around 8% in the same setup (method in scripts/BENCH.md).
The sidebar shows which agent is running, waiting, done or failed, and ⇧⌘J jumps to the one waiting on you. It's built on libghostty and reads your Ghostty config. Coming from cmux, there's a one-click import.
Limits: macOS 14+ on Apple silicon only, and rewind only works with Claude Code, not Codex.
Free and MIT. Tell me what breaks and what you'd want next.