Microsoft has announced the general availability of Agent Skills for .NET, moving the feature out of experimental preview and providing a stable, production-ready API for developers working with the Microsoft Agent Framework. This release enables .NET developers to create and integrate reusable packages of domain expertise, known as "skills," into their AI agents. Skills, comprising instructions, reference documents, and scripts, are loaded on demand, optimizing the agent's context window. The framework supports three authoring styles: file-based skills, class-based skills, and code-defined skills. Robust governance controls include human-in-the-loop approval for loading instructions, reading resources, and executing scripts, as well as controlled script execution and filtering capabilities. The framework is designed to improve agent efficiency and consistency, allowing companies to package HR policies or IT security guidelines as skills. The underlying source classes are now public, offering extensibility for developers to compose custom pipelines or integrate skills from their own registries.