cmux-claude-code

A Claude Code plugin that updates the cmux sidebar with live session status, tool progress, and notifications.

What it does

Event	Effect
Session starts	Initializes the cmux sidebar
You submit a prompt	Sidebar shows "Thinking" in blue; tool/progress indicators clear
Claude uses a tool	Sidebar shows the tool name with an emoji label; progress bar advances
Claude finishes	Sidebar shows "Done" in green; progress fills to 100%; sends a notification
Claude sends a notification	Forwards it to cmux

The progress bar uses a logarithmic scale — grows fast on early tool calls, slows as they accumulate, and fills to 100% only when Claude finishes.

Scripts are no-ops outside a cmux workspace (detected via cmux identify) — safe to install globally.

Installation

curl -fsSL https://raw.githubusercontent.com/tslateman/cmux-claude-code/main/install.sh | bash

Or clone directly:

git clone https://github.com/tslateman/cmux-claude-code.git ~/.claude/plugins/cmux-claude-code

Update

git -C ~/.claude/plugins/cmux-claude-code pull

Or run the install script again; it pulls if already installed.

Requires cmux with the CLI at /Applications/cmux.app/Contents/Resources/bin/cmux and jq for JSON parsing.

Hooks

Hook	Script	Trigger
SessionStart	scripts/session-start.sh	Claude Code session opens
UserPromptSubmit	scripts/thinking.sh	User submits a prompt
PostToolUse	scripts/tool-status.sh	Claude finishes a tool call
Stop	scripts/notify.sh	Claude stops generating
Notification	scripts/notification.sh	Claude Code emits a notification

License

MIT