Walkthrough: Using GPT-5.5 in the GitHub Copilot CLI to vibe code a YouTube thumbnail generator

I used the GitHub Copilot CLI to generate an Electron + React app to make my YouTube thumbnails! Here's the repo: https://github.com/cassidoo/yt-thumbz Here's the CLI: https://github.com/features/copilot/cli/ Full CLI session logs: https://gist.github.com/cassidoo/c5553d3bd3177b641fadb18f62d14b54 --- Website + blog: https://cassidoo.co Newsletter: https://cassidoo.co/newsletter/ GitHub: https://github.com/cassidoo LinkedIn: https://www.linkedin.com/in/cassidoo/ Bluesky: https://cass.run/bsky Twitch: https://www.twitch.tv/cassidoo Twitter: https://twitter.com/cassidoo Mastodon: https://notacult.social/@cassidoo