GitHub/CoPilot/CLI/Subagent

• Creating and using custom agents for GitHub Copilot CLI

  • GitHub/CoPilot/CLI's implementation of AI/Agent/Subagent: specialized assistants defined in Markdown.
  • Packaged as *.agent.md files inside a GitHub/CoPilot/CLI/Plugin, per About plugins.
  • Copilot CLI is one of the few hosts that packages skills, hooks, custom agents, MCP, and LSP in one bundle.