Visual Studio Weekly: Custom Copilot Agents Are Here

Visual Studio's March 2026 update dropped last week, and it's the most significant Copilot extensibility release I've seen in the IDE. Custom agents, live profiling during debugging, and enterprise MCP governance are all here. If you've been waiting for AI tooling that actually fits your workflow instead of forcing you into a generic assistant box, this is the update. Custom Agents: Build Copilot for Your Codebase The headline feature is custom agents. You can now define specialized Copilot agents as .agent.md files in your repository. Drop them in .github/agents/ and they appear in the agent picker, ready to use with full access to workspace awareness, code understanding, tools, and MCP connections. This is what AI extensibility should look like. Instead of prompting a general-purpose assistant to "follow our coding standards" every single time, you define an agent that knows your standards, can run your build pipeline, query your internal docs, and enforce your team's conventions aut