pi-terminal-signals

Let's pi send standard OSC escape sequences to inform the terminal it is running in of its status.

Ghostty will display a progress line at the top while pi is running the agent loop. Supacode, Supaterm and Conductor use it to display a spinner / finished icon on the worktree / agent tab.

Demo

https://github.com/user-attachments/assets/1cdefbb4-e7c7-40a3-824d-2ccaddbd3a54

Unmute for audio.

Install

pi install npm:pi-terminal-signals

What it does

Pi event	Escape sequence	Terminal effect
agent_start	OSC 9;4;3	Tab shows indeterminate progress spinner
agent_end	OSC 9;4;0	Progress indicator clears
agent_end	OSC 133;D;0	"Command finished" — triggers completion notification

OSC 9;4 — Progress indicator protocol (originated in ConEmu, adopted by Ghostty, WezTerm, Windows Terminal). State 3 is indeterminate (spinner), state 0 clears.

OSC 133 — Semantic prompt protocol (originated in FinalTerm, adopted by Ghostty, iTerm2, Kitty, WezTerm, VS Code terminal). Marker D;0 means "command finished successfully" — Ghostty uses this to fire a tab completion notification.