GitHub Debuts AI-Powered Emoji List Generator Built with Copilot CLI

GitHub Unveils Open-Source Emoji List Generator

Breaking — GitHub has launched a free, open-source emoji list generator powered by its Copilot CLI, built live during the team's weekly "Rubber Duck Thursdays" stream. The tool automatically replaces plain bullet points with relevant emojis and copies the result to the clipboard.

"We wanted to solve the problem of picking the perfect emoji when you're moving fast," a GitHub spokesperson said. "Now you just paste your list, hit Ctrl+S, and get emoji-fied output instantly."

How It Works

The application runs entirely in the terminal. It uses @opentui/core for the user interface, @github/copilot-sdk to generate emoji suggestions, and clipboardy to copy the final list. Users paste or write bullet points, press Ctrl+S, and receive an emoji-enhanced version on their clipboard.

The development process showcased Copilot CLI's plan mode (using Claude Sonnet 4.6) to outline the project, followed by autopilot mode (using Claude Opus 4.7) to implement it. "In plan mode, Copilot asked clarifying questions about the tech stack and libraries, then generated a full plan.md file for us," explained a GitHub engineer on the stream.

Background

GitHub's Rubber Duck Thursdays stream is a weekly event where the team builds projects live, collaborates with the community, and answers questions. This week's project was inspired by the difficulty of choosing emojis quickly in social media posts and launch announcements.

The tool uses a multi-model workflow — including the allow-all flag and GitHub's MCP server — to deliver intelligent emoji matching. The entire codebase is now available as open source on GitHub.

What This Means

This generator demonstrates how AI can automate tedious creative decisions, freeing developers to focus on code. By integrating Copilot CLI's SDK with a simple terminal UI, GitHub showcases a practical use case for generative AI in everyday developer tools.

"It's a small but mighty project that shows the power of combining plan mode, autopilot, and multi-model workflows," the stream host noted. Developers can now build similar AI-enhanced CLI tools using the GitHub Copilot CLI docs and the Copilot SDK.

The emoji list generator is free and open source — available now for anyone to fork, modify, or use as a starting point for AI-powered terminal applications.