internal/

Package protocol is the relay wire + crypto contract, shared by the runner and (mirrored in JS) the browser viewer.

Package ptysession runs a command in a pseudo-terminal and exposes its IO plus a resume ring buffer.

Package relayclient talks to the relay control plane: it creates a session over REST and dials the runner WebSocket.

Package runner wires a PTY session to the relay: it mirrors the command to the local terminal, streams an end-to-end-encrypted copy to a viewer, pumps the viewer's input back, and survives reconnects.