Microsoft brings a .NET modernization agent to GitHub Copilot

Microsoft has introduced the Upgrade Agent, a GitHub Copilot agent that automates migrating .NET applications to newer versions of the platform. Rather than a one-shot prompt, it runs as a multi-phase workflow: it assesses the project and its dependencies, builds a prioritized upgrade plan, executes code transformations, and tracks builds and errors in real time. Progress and code changes are shown on an interactive upgrade canvas. The agent is available in Visual Studio, Visual Studio Code, and GitHub Copilot CLI, and is added via the microsoft/upgrade-agent-plugins marketplace plugin.