Developer-Tools

Building and Testing Custom Agents

Building custom agents for GitHub Copilot (or any other AI assistant for that matter) sounds fun until you hit the reality of testing them. Let me walk you through the challenges and show you a better way to develop and test your agents locally.

Building Skills: How to Write a Good Agent Skill

Let’s talk about Agent Skills.

My GitHub Copilot-Powered Development Workflow

Throughout 2025, I’ve been experimenting with various ways to organize my development workflow with coding agents, trying to maximize the satisfaction of shipping a product while minimizing the human effort required to get things done.

GitHub Copilot Customization: Instructions, Prompts, Agents and Skills

We’re approaching the end of 2025, this has been a year of agents, for sure.

Monitoring GitHub Copilot Adoption with Metrics

Introduction

Since GitHub released the Copilot usage metrics dashboard and API in public preview back in October, I’ve been spending a lot of time helping enterprise administrators understand Copilot’s impact using these metrics.