Tmux and Claude Code: Sessions, Send-Keys, and the Ceiling

Tmux is used to run AI coding agents in named, detachable sessions that persist even if the terminal closes or an SSH connection drops. It allows users to manage multiple agents within a single window, use "send-keys" to input commands into any agent via a script, and employ "capture-pane" to read output. This setup is effective for automating interactions with AI agents, despite relying on string matching against a TUI's rendered frame on a five-second poll, with match strings that may change with agent versions.

This report details how Tmux allows for persistent, scriptable interaction with AI agents, unlike direct terminal sessions that would terminate with a closed connection.