The latest articles on Forem by Christoph Deil (@kryvoff). https://forem.com/kryvoff https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3769704%2F73d80a75-cb5b-496f-bd36-4cf76eb3afac.jpeg https://forem.com/kryvoff en Christoph Deil Mon, 16 Feb 2026 02:14:50 +0000 https://forem.com/kryvoff/meet-coco-the-copilot-for-copilot-42ko https://forem.com/kryvoff/meet-coco-the-copilot-for-copilot-42ko <p><em>This is a submission for the <a href="https://dev.to/challenges/github-2026-01-21">GitHub Copilot CLI Challenge</a></em></p> <h2> What I Built </h2> <p>I wanted to try the new experimental GitHub Copilot CLI features — <strong>autopilot mode</strong>, <strong>fleet (sub-agents)</strong>, and <strong>plan mode</strong> — and try and understand what's happening under the hood.</p> <p>I built <strong>Cocopilot</strong>, an Electron app that monitors <code>~/.copilot/session-state/*/events.jsonl</code> and visualises and makes sounds when Copilot does things. It was an experiment with spec-driven development and vibe coding trying to keep going via a <code>progress.md</code> and many agent turns and fleet using Claude Opus 4.6 with the Copilot CLI.</p> <p>Overall it worked and I'm happy with the result:</p> <p>🔗 <strong>GitHub</strong>: <a href="https://github.com/kryvoff/cocopilot" rel="noopener noreferrer">github.com/kryvoff/cocopilot</a></p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fe1nazyb120hje7wusqpg.gif" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fe1nazyb120hje7wusqpg.gif" alt="Cocopilot Demo" width="1200" height="768"></a></p> <h2> My Experience with Copilot CLI </h2> <ul> <li>The new Copilot autopilot mode and fleet of sub-agents is awesome!</li> <li>I managed to vibe-code an app in a day for a few Euros</li> <li>Establishing a debug and test feedback loop where the agents can "see" the app is important</li> <li>Spec-driven development and a <code>progress.md</code> can work, but was a bit rocky</li> <li>See 🎥 <strong>YouTube</strong>: <a href="https://youtu.be/i8tTvALxEC8" rel="noopener noreferrer">Exploring Copilot CLI's New Features</a> </li> </ul> <h1> Try it today </h1> <p>Type <code>copilot --yolo</code>, set <code>/experimental on</code>, shift tab to <code>autopilot</code> and type <code>/fleet Let's go ...</code></p> devchallenge githubchallenge cli githubcopilot