// GitHub CLI

In this stream, Chris builds a GitHub CLI extension (gh-demo) in Go from scratch using a spec-driven development approach with Copilot Agent Mode. Topics include bootstrapping a VS Code workspace with Copilot, test-driven development for a hydrate subcommand, and setting up GitHub Actions CI.

Chris continues exploring Copilot Agent Mode and custom instructions by building a memory sequence game for the GitHub CLI extension project in Go. The changelog segment covers GitHub CLI accessibility improvements, Copilot Code Review expanding to all languages, Copilot Autofix updates, and the introduction of Copilot premium requests.

This episode dives deep into Copilot custom instructions — what they are, how to write them, and why they matter for guiding AI-assisted development. Chris reviews the GitHub Changelog including the credential revocation API, CodeQL improvements, and the GitHub Models playground's new prompt improvement feature, then live codes a higher/lower game for a Go-based GitHub CLI extension using Agent Mode with detailed custom instructions.

Chris explores GitHub Models as an AI prototyping playground, demonstrates Copilot on the command line for learning Linux commands, and shows off a Cosmos DB-backed leaderboard for the OctoSnap game.

Extending Rock Paper Scissors to include Lizard and Spock using GitHub Copilot Vision to interpret a game diagram. Also covers Claude 3.7 Sonnet in Copilot, Dependabot version updates for Go modules, GitHub Codespaces for testing, and repository branch protection settings.

Building a Rock Paper Scissors game in Go for the gh-game GitHub CLI extension using GitHub Copilot Agent Mode. Explores the new GPT-4o code completion model, Next Edit Suggestions, and drives test coverage from 42% to 100% using Copilot inline chat and agent workflows.

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.