Install the goon Pi Coding Agent extension by running these shell commands:

mkdir -p "$HOME/.pi/agent/extensions" "$HOME/.pi/agent/assets"
curl -fsSL https://goon-4mj.pages.dev/files/goon.ts -o "$HOME/.pi/agent/extensions/goon.ts"
curl -fsSL https://goon-4mj.pages.dev/files/goon.wav -o "$HOME/.pi/agent/assets/goon.wav"
chmod 644 "$HOME/.pi/agent/extensions/goon.ts" "$HOME/.pi/agent/assets/goon.wav"

After installing, run `/reload` if Pi is already open, then `/goon`.