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Building a Tic Tac Toe game in Go for the gh-game GitHub CLI extension using GitHub Copilot Agent Mode. Also covers setting up CodeQL code scanning, fixing GitHub Actions workflow permissions, and a demo of GitHub Spark for creating micro apps from natural language prompts.

Building on the gh-game CLI extension project, Chris sets up GitHub Codespaces with dev containers, creates a CI workflow using GitHub Actions, and writes Go tests. The stream covers refactoring the coin toss game to use the go-gh prompter package for interactive selection menus, with GitHub Copilot assisting across multiple AI models.

Deep dive into GitHub Actions workflows including build, linter, and release pipelines for the GitHub Skyline CLI extension. Chris cuts a live release, then creates a brand new GitHub CLI extension (gh-game) from scratch — building a coin toss game in Go using the Cobra package with help from GitHub Copilot.

Chris introduces the GitHub Skyline CLI extension, a Go-based tool that generates 3D STL models and ASCII art visualizations of your GitHub contribution history. The stream covers the gh skyline command, 3D printing contribution graphs, and live refactoring of the Go codebase using GitHub Copilot Edits to split a monolithic main.go into modular components.

GitHub uses GitHub to build GitHub, and our CLI extensions are no exception. Read on to find out how we built the GitHub Skyline CLI extension using GitHub!

This is a companion walkthrough for the hero Game of Life video that was published on the GitHub YouTube channel.

Builds Conway's Game of Life end-to-end using GitHub Copilot Chat and Copilot Edits in Visual Studio Code, demonstrating a realistic iterative AI-assisted development workflow. The video covers model selection (including Claude Sonnet 3.5), prompt engineering best practices, refactoring from a single-file prototype to separate HTML, CSS, and JavaScript files using Copilot Edits, and enforcing team coding standards with a Copilot instructions file. It also shows inline chat slash commands (/doc, /explain), Copilot Extensions, README generation, and deploying to GitHub Pages via a GitHub Actions workflow.

Introduces GitHub push rulesets, a governance feature that restricts what can be pushed to a repository based on the attributes of changed files—including path, extension, and size. The video demonstrates protecting sensitive files such as GitHub Actions workflow files, configuring bypass rules for designated roles, viewing blocked-push and bypass insights, and explains that push rules are enforced across the entire fork network of a repository.

gh-skyline is a GitHub CLI extension that generates an STL file of a user's GitHub Contribution history

Introduces enterprise repository policies in GitHub, a governance feature that lets administrators restrict repository operations—including visibility changes, creations, deletions, transfers, and naming—across all organizations in an enterprise account. The video also demonstrates repository properties defined at the enterprise level, giving organization admins consistent, inherited property values and requiring them at repository creation time to enforce compliance from day one.