Collabora Online (COOL) is a LibreOffice-based online office suite with collaborative editing. Time-to-start-hacking COOL has been lowered from ~a day to ~10 minutes thanks to integration with GitPod, a dev environment in the cloud, on its GitHub repo. We will try to share the story on and discuss these topics: - What was it like in the past - The search for ways to lower the barrier - Cloud dev environments - Setting up the repo for GitPod integration - Adapting the infra/CI for faster builds in the cloud (and its nice side effects) - Quick start on hacking COOL in the cloud - Some numbers - Can it be applied also to core (LibreOffice) repo? How?