Implementing a Remote Debugger with Node and tmux

RWX addresses a common CI/CD debugging challenge: workflows often run in Linux-based remote environments that differ from developers’ local machines, making failures difficult to investigate through slow cycles of log statements and repeated pushes. Its remote debugger lets engineers place an `rwx-breakpoint` anywhere in a task or script, pausing execution at the desired point and enabling a local shell connection through the `rwx debug {debugId}` command. The implementation creates a uniquely named tmux session in the task container, signals the host through a pipe to launch an SSH server, and waits until the tmux debugging session ends before continuing. On the server side, SSH connections are attached to the container’s tmux session using Node packages including ssh2 and node-pty, while the open-source RWX CLI uses existing RWX authentication to obtain the necessary connection keys.

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