Last month a <a href="https://github.com/manaflow-ai/cmux" target="_blank" rel="noopener nofollow">cmux</a> crash wiped an hour of carefully arranged workspaces — splits, commands, everything. Gone.
I looked for a recovery tool. **There wasn’t one. **(At the time I started. Now there are few <a href="https://github.com/manaflow-ai/cmux/issues/1984" target="_blank" rel="noopener nofollow">tries/workarounds</a> on the go)
If you’ve used tmux, you might know <a href="https://github.com/tmux-plugins/tmux-resurrect" target="_blank" rel="noopener nofollow">tmux-resurrect</a> — it lets you save and restore your entire tmux session across reboots (12K+ stars, essential for any serious tmux workflow). cmux had nothing like it. Inspired by this project, I built one: <a href="https://github.com/drolosoft/cmux-resurrect" target="_blank" rel="noopener nofollow">cmux-resurrect</a>. (The command is <code>crex</code> for short.)
<code>crex save</code> — captures your entire layout: splits, working directories, pinned tabs, startup commands.
<code>crex restore</code> — brings it all back exactly as it was.
But here’s what I’m most excited about: Workspace Blueprints:Your layouts become human-readable Markdown files — edit them by hand, version them in git, or open them in Obsidian. Your terminal layout,_ human-readable and shareable._
It also has dry-run mode (preview before restoring), reusable templates, and auto-save via launchd.
Built in Go. MIT licensed. Single binary. Homebrew installable.
Huge thanks to the <a href="https://github.com/manaflow-ai/cmux" target="_blank" rel="noopener nofollow">cmux</a> team for building such a clean public API — crex wouldn’t exist without it — and to <a href="https://github.com/tmux-plugins/tmux-resurrect" target="_blank" rel="noopener nofollow">tmux-resurrect</a> for proving this idea works.
If you’ve ever lost a cmux session and spent 20 minutes rebuilding it — this is for you. 🔗 <a href="https://github.com/drolosoft/cmux-resurrect" target="_blank" rel="noopener nofollow">github.com/drolosoft/cmux-resurrect</a>

Juan Andrés Moreno Rubio

After a cmux crash wiped an hour of carefully arranged workspaces, the author built cmux-resurrect (crex) — a save/restore tool for cmux sessions inspired by tmux-resurrect. It captures splits, working directories, pinned tabs, and startup commands, then restores them exactly. A standout feature is Workspace Blueprints, which saves layouts as human-readable Markdown files that can be edited, versioned in git, or opened in Obsidian. Additional features include dry-run mode, reusable templates, and auto-save via launchd. Built in Go, MIT licensed, distributed as a single binary installable via Homebrew.

A crash took my cmux workspaces. So I built cmux-resurrect.