tmux Session Control Control tmux sessions by sending keystrokes and reading output. Essential for managing Claude Code sessions. When to Use ✅ USE this skill when: Monitoring Claude/Codex sessions in tmux Sending input to interactive terminal applications Scraping output from long-running processes in tmux Navigating tmux panes/windows programmatically Checking on background work in existing sessions When NOT to Use ❌ DON'T use this skill when: Running one-off shell commands → use exec tool directly Starting new background processes → use exec with background:true Non-interactive scripts → use exec tool The process isn't in tmux You need to create a new tmux session → use exec with tmux new-session Example Sessions Session Purpose shared Primary interactive session worker-2 - worker-8 Parallel worker sessions Common Commands List Sessions tmux list-sessions tmux ls Capture Output

Last 20 lines of pane

tmux capture-pane -t shared -p | tail -20

Entire scrollback

tmux capture-pane -t shared -p -S -

Specific pane in window

tmux capture-pane -t shared:0.0 -p Send Keys

Send text (doesn't press Enter)

tmux send-keys -t shared "hello"

Send text + Enter

tmux send-keys -t shared "y" Enter

Send special keys

tmux send-keys -t shared Enter tmux send-keys -t shared Escape tmux send-keys -t shared C-c

Ctrl+C

tmux send-keys -t shared C-d

Ctrl+D (EOF)

tmux send-keys -t shared C-z

Ctrl+Z (suspend)

Window/Pane Navigation

Select window

tmux select-window -t shared:0

Select pane

tmux select-pane -t shared:0.1

List windows

tmux list-windows -t shared Session Management

Create new session

tmux new-session -d -s newsession

Kill session

tmux kill-session -t sessionname

Rename session

tmux rename-session -t old new Sending Input Safely For interactive TUIs (Claude Code, Codex, etc.), split text and Enter into separate sends to avoid paste/multiline edge cases: tmux send-keys -t shared -l -- "Please apply the patch in src/foo.ts" sleep 0.1 tmux send-keys -t shared Enter Claude Code Session Patterns Check if Session Needs Input

Look for prompts

Send 'y' and Enter

tmux send-keys -t worker-3 'y' Enter

Or select numbered option

tmux send-keys -t worker-3 '2' Enter Check All Sessions Status for s in shared worker-2 worker-3 worker-4 worker-5 worker-6 worker-7 worker-8 ; do echo "=== $s ===" tmux capture-pane -t $s -p 2

/dev/null | tail -5 done Send Task to Session tmux send-keys -t worker-4 "Fix the bug in auth.js" Enter Notes Use capture-pane -p to print to stdout (essential for scripting) -S - captures entire scrollback history Target format: session:window.pane (e.g., shared:0.0 ) Sessions persist across SSH disconnects

安装