muxr

Tmux session manager for AI coding workflows. One command to open a session, one keybind to switch between them, survives reboots.

The problem

You work across multiple projects. Each one needs its own terminal session with the right working directory and the right tool running. You open tabs, cd around, lose track of what is where. When you reboot, everything is gone.

muxr organizes tmux sessions into verticals (local directory trees) and remotes (GCE instances). Each session knows where it lives and what tool to run. muxr save snapshots everything. muxr restore brings it back.

Install

cargo install nomograph-muxr

Pre-built binaries for macOS arm64 and Linux amd64 are available in releases.

Quick start

muxr init                       # create config
muxr work api                   # open work/api session
muxr personal blog              # open personal/blog session
muxr switch                     # TUI picker to jump between them
muxr save                       # snapshot before reboot
muxr restore                    # bring everything back

Config

One file: ~/.config/muxr/config.toml

default_tool = "claude"

[verticals.work]
dir = "~/projects/work"
color = "#7aa2f7"

[verticals.personal]
dir = "~/projects/personal"
color = "#9ece6a"

[remotes.lab]
project = "my-gce-project"
zone = "us-central1-a"
user = "deploy"
color = "#d29922"
# connect = "mosh"       # default; set to "ssh" for gcloud compute ssh
# instance_prefix = ""   # optional prefix for GCE instance names

Verticals are local directory trees. Remotes are GCE instances resolved via gcloud. Each gets a color that shows up in the TUI switcher and the tmux status bar. Remotes require the gcloud CLI.

How sessions work

muxr is a thin layer over tmux. Each session gets a named tmux session, the right working directory, and your default tool running.

muxr work api
  tmux new-session -s "work/api" -c ~/projects/work
  tmux send-keys "claude" Enter
  tmux attach -t "work/api"

Session names follow the pattern vertical/context. You can nest further: muxr work api auth creates work/api/auth. Sessions persist across terminal restarts because tmux keeps them alive.

TUI switcher

muxr switch opens an interactive picker. Sessions are color-coded by vertical, sorted by most recent activity. Local and remote sessions appear together.

Key	Action
`j` / `k`	Navigate
`Enter`	Attach to session
`d`	Kill session (with confirmation)
`/`	Fuzzy filter
`q`	Quit

Bind it in tmux for instant access:

bind s display-popup -E -w '80%' -h '80%' "muxr switch"

Remote sessions

Remote sessions create a local tmux proxy that connects to a GCE instance and attaches to the remote tmux. The default connect method is mosh; set connect = "ssh" for gcloud compute ssh. Sessions appear in muxr ls and the switcher alongside local sessions.

muxr lab trustchain             # connect to remote, attach tmux
muxr lab ls                     # list remote sessions

Connections auto-reconnect on drops with exponential backoff.

Save and restore

muxr save                       # snapshot all sessions to JSON
muxr restore                    # recreate after reboot

Restore recreates local sessions with the correct directory and tool. Remote sessions re-establish connections.

Commands

Command	What it does
`muxr`	Control plane (bare shell)
`muxr <vertical> [context...]`	Create or attach to a local session
`muxr <remote> [context...]`	Create or attach to a remote session
`muxr new <vertical> [context...]`	Create session in background
`muxr switch`	Interactive TUI session picker
`muxr ls`	List active sessions
`muxr save`	Snapshot session state
`muxr restore`	Recreate sessions after reboot
`muxr kill <name>`	Kill a session
`muxr kill all`	Kill all sessions
`muxr rename <name>`	Rename current session
`muxr init`	Create default config
`muxr completions <shell>`	Shell completions (zsh, bash, fish)
`muxr tmux-status`	tmux status bar integration

License

MIT

Built in the Den by Tanuki and Andrew Dunn, 2026.

nomograph-muxr 1.0.0