If you’ve ever dumped a giant problem into Copilot Chat and watched the conversation slowly turn into spaghetti, subagents are the feature you’ve been waiting for. Think of subagents as specialized mini-Copilots you spin up on demand. You hand them a self-contained problem: refactor this mess, write tests for that file, scan the workspace for security issues – and they go off and do the heavy lifting in an isolated context while you keep working. They landed in VS Code v1.107 (December 2025) as part of the GitHub Copilot Chat experience, and they’re one of those things that feels “nice to have” at first… right up until you use them … Read more