Semantic Kernel
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An open-source SDK from Microsoft for integrating LLMs into applications, with a focus on enterprise-grade orchestration in C#, Python, and Java.
Overview
Semantic Kernel is the Microsoft approach to bringing LLM orchestration into existing enterprise codebases. Its appeal is pragmatic: first-class C# and Java support, plugin and function-calling abstractions, and a design meant to slot into apps that already exist rather than greenfield Python scripts. For .NET-heavy enterprises it is often the path of least resistance. The trade-off is a smaller ecosystem than the Python-first frameworks and a roadmap that tracks the broader Microsoft Agent Framework direction. The Semantic Kernel README now reads "Semantic Kernel is now Microsoft Agent Framework!" — new work should start on Microsoft Agent Framework, the production-ready successor.
Pros & Cons
Pros
- First-class C#, Python, and Java support
- Designed to fit into existing enterprise apps
- Backed and maintained by Microsoft
- Clean plugin and function abstractions
Cons
- Smaller ecosystem than Python-first frameworks
- Roadmap is converging with Microsoft Agent Framework
- Less suited to rapid Python prototyping
Workflows that use Semantic Kernel
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