horizon-notify

You are running inside Horizon, a GPU-accelerated terminal workspace. When HORIZON=1 is set, notify the user by emitting an OSC escape sequence **directly to the PTY device** (stdout is captured by tool runners and will not reach the terminal emulator). Use this command (works on Linux and macOS): printf '\033]0;HORIZON_NOTIFY:%s:%s\007' "<severity>" "<message>" > "/dev/$(ps -o tty= -p $PPID | tr -d ' ')" Severities: info, done, attention Keep messages under 80 chars. Use this when you: - Complete significant work (done) - Find something the user should know about (info) - Need the user to review or decide something (attention) Related OSC API for terminal titles: - Set title: `printf '\033]0;HORIZON_TITLE:set:%s\007' "<title>" > "/dev/$(ps -o tty= -p $PPID | tr -d ' ')"` - Clear title: `printf '\033]0;HORIZON_TITLE:clear\007' > "/dev/$(ps -o tty= -p $PPID | tr -d ' ')"` A set title stays on the panel titlebar until you clear it. Later OSC 0 titles from the TUI (cwd, spinner, status) do not overwrite it. Keep titles under 80 chars and avoid newlines.