// GitHub Copilot

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.

In this episode, Chris reviews the GitHub Changelog covering organization-level Copilot custom instructions, CodeQL for Actions workflow security analysis, Copilot Code Review language expansion, secret scanning alert dismissals, and GitHub Mobile updates. The coding segment tackles theme switching for the Copilot Airways web app and a Tailwind CSS upgrade using GitHub Codespaces and Copilot Agent Mode.

A model-packed week — Chris walks through new releases including GPT-4.1, Gemini 2.5 Pro, O3, O4 mini, and Meta Llama 4 in Copilot and GitHub Models. He demos the strategy trend radar app, tries the new Codespaces agent mode button, and builds a GitHub Actions workflow that summarizes the changelog into a newsletter using GitHub Models.

Chris explains what Model Context Protocol (MCP) is and demos the new GitHub MCP server alongside Copilot Agent Mode in VS Code. The stream covers creating repos and issues through MCP tools, then builds a strategy visualization app from a screenshot using agent mode, vision, and the Playwright and sequential thinking MCP servers.

This episode dives deep into GitHub Advanced Security's new standalone Secret Protection and Code Security products. Chris demos secret scanning, push protection, custom patterns, and the free secret risk assessment report, then shows off a GitHub-themed brick breaker game powered by real contribution graph data.

Chris live-codes a GitHub-themed brick breaker walkthrough using Copilot agent mode, demonstrating how prompt framing, context, and custom instructions shape AI-generated output.

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.

Chris introduces OctoSnap, a GitHub-themed memory card game built with Next.js, and dives deep into designing a scoring model with Copilot covering difficulty multipliers, time bonuses, and penalty mechanics.

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.