☝️ First

Happy Pi Day 🥧 🔢 🧮 ♾️ 🎉

GitHub Copilot: Setup and Impact

I recently built two Custom Agents in GitHub Copilot and the results have been worth sharing.

What Is a Custom Agent?

Custom Agents are specialized versions of Copilot defined in a single .agent.md file. You give it a Name, a Role/Description, and Instructions - and Copilot behaves as that specialist whenever invoked

Agent vs Skill (A Brief Comparison)

A common question: “Doesn’t a Skill do the same thing?”

Not quite.

Agent → A specialist teammate. Runs as a subagent. Best for role-based work like audits and reviews Skill → A reusable reference. Best for repeatable procedures and templates.

A simple way to think about it:

Need a persona? Use an Agent.
Need a procedure? Use a Skill.

And they work great together

Setup and Adoption

No new tool to install : it lives inside the existing Copilot setup
Single .agent.md file per agent : easy to version control and update.
On-demand invocation : no forced workflow changes required.

Why This Matters

This is a small setup with a compounding return. If you’re using GitHub Copilot, it’s worth trying.

Have you built Custom Agents in Copilot? I’d love to hear what you’re using them for.

Thanks for Reading!