Mulpex

Mulpex is a native macOS app for running multiple Claude Code sessions side-by-side, each in its own git worktree.

Download for macOS

Mulpex with multiple tabs

Multi-tab

Run multiple Claude sessions in one window without iTerm or zsh fighting your keyboard shortcuts. Mulpex owns the keyboard layer, so Ctrl-keys and readline behave the way Claude expects.

Worktree isolation

Each Claude lives in its own git worktree on its own branch, so parallel sessions don't step on each other. Spin up a tab, work on a feature, merge or discard when you're done.

Runbooks

Long-term memory for recurring workflows. Save a Claude session as a runbook, then reattach it in any future session via the ⌘P picker.