Visual Studio Weekly: Copilot Memories, AI-Powered Testing, and Custom Agents

The Headline Visual Studio 2026 version 18.3 shipped this past week (February 10), and it's the kind of release that makes me believe Microsoft is actually listening to developers. Between Copilot memories that persist your coding standards across sessions, GA of AI-powered unit test generation for .NET, and a framework for building custom Copilot agents, this update isn't padding the changelog with fluff — it's shipping features that change how you work. The secondary story is productivity: syntactic line compression that gives you 25% more vertical screen space, fast scrolling with Alt+scroll wheel, and middle-click scrolling are all quality-of-life wins that compound over the hours you spend in the IDE. Let's break down what matters. Copilot Memories: Teaching the AI Your Coding Standards Here's the problem with most AI coding assistants: they forget. You correct them once, and ten minutes later they're back to violating your team's conventions. Visual Studio 18.3 introduces Copilot