Subagents are a critical feature that GH Copilot still lacks. They allow your main agent to use another agent as a tool, meaning the main agent's context doesn'

Subagents are a critical feature that GH Copilot still lacks. They allow your main agent to use another agent as a tool, meaning the main agent's context doesn't get nearly as polluted. Good read on the benefits of this pattern: https://jxnl.co/writing/2025/08/29/context-engineering-slash-commands-subagents/ https://jxnl.co/writing/2025/08/29/context-engineering-slash...