How to add custom agents from the marketplace?

[kuddai]

Noob question, I might be missing something in the docs, but how do I setup an agent different from default none agent? What should I change in my nvim config, or what commands should I call. Command for copilot agents, shows only none agent for me. How should I add agents from marketplace?

[deathbeam]

https://github.com/marketplace/mermaid-chart for example, just click add, install, it should appear after restart: