GitHub Copilot now lets you define multiple custom AI agents using agents.md files—so instead of one general-purpose assistant, you can create a whole team: a docs agent, a test agent, a security agent—each with its own job description and rules.
Think of agents.md like an operating manual: it tells the agent who it is, what it’s allowed to do, what tools it can run, what parts of the repo it understands, and what it must never touch.
00:00 - Intro
00:40 - Why most agents fail?
01:20 - Patterns that work
02:36 - Example of good agent.md file
03:10 - How to start writing your agent.md
04:00 - Which agents to build?
