Semantic Kernel is Microsoft's open-source SDK for integrating language models with application code, tools, plugins, memory, and agent workflows. The README now positions Microsoft Agent Framework as its enterprise-ready successor, while Semantic Kernel remains an important foundation and migration point for applications built around Microsoft's earlier agent and orchestration stack.

The project was designed to let developers connect models from multiple providers with native code and reusable functions, then orchestrate those capabilities into assistants and agentic applications. Its ecosystem has covered planning, plugins, prompt execution, connectors, memory, and integrations across languages commonly used in enterprise development.

For teams already using Semantic Kernel, the repository is especially relevant as a source of SDK code, documentation, examples, and migration guidance toward Microsoft Agent Framework. It remains useful for understanding Microsoft's approach to model orchestration and for maintaining existing Semantic Kernel applications while newer agent infrastructure is adopted.