tmux

Discover, open, verify, focus, resize, inspect and close tmux panes and windows by exact pane ID, returning JSON with stable session, window and pane IDs. Launches a command in a detached pane, confirms it actually started, and reports explicitly when tmux is missing or the caller is outside tmux so the workflow can fall back to direct launch instructions. Never touches unnamed panes or global tmux settings. Use when a workflow needs a terminal for a long-running or interactive tool (a review UI, server, watcher, editor), when checking whether tmux is available, or when inspecting or cleaning up panes it opened. Application skills say what to run; this skill decides where it runs.