Semantic Kernel

Microsoft’s enterprise SDK for integrating LLMs with plugins, planners, and vector stores. Deep Azure AI integration, MCP, A2A, and a bridge into the newer Microsoft Agent Framework.

Languages

Python 3.10+ · .NET 6.0+

Latest

Python v1.43.0 · .NET v1.74.0 · June 2026

Best for

Enterprise plugin-based agents, Microsoft 365 integrations, Azure-native apps.

Choose your language

🐍 Python v1.43.0 · asyncio, FastAPI, MCP client+server, A2A integration.

C# .NET v1.74.0 · DI, Polly resilience, Application Insights, ASP.NET Core.

Cross-cutting reference (language-agnostic)

Comprehensive Architecture + concepts reference.

Production Deployment, scaling, monitoring.

Diagrams Architecture + flow diagrams.

Recipes Copy-paste patterns for common scenarios.

What’s new (April 2026)

Vector stores v1.34 — new abstractions with pluggable providers.
MCP client + server (March 2025).
Google A2A protocol integration.
Microsoft Agent Framework bridge for gradual migration.

Revision history

Date	Framework version (installed)	Summary of changes	Reviewer
2026-09-08	Py 1.43.0 / .NET 1.74.0	Consistency sweep. Python version corrected from a stale 1.41.3 to 1.43.0 on the overview card and language card; the language-neutral comprehensive guide’s header and frontmatter description now match. No package installation or symbol verification performed.
2026-04-28	semantic-kernel 1.41.3	Version bumped 1.41.2 → 1.41.3 (patch release); version card and Python sub-index updated. PyPI confirms 1.41.3 as latest stable.	Claude routine
2026-04-22	semantic-kernel 1.41.2	Python version corrected from stale 1.36.0 to 1.41.2 across this overview and the Python sub-index. PyPI confirms 1.41.2. frameworks.ts updated.	Claude routine
2026-04-21	Py 1.36.0 / .NET 1.74	Version corrected against installed pip package; parent index as language selector + cross-cutting guides.	—
April 2026	Py 1.36.0 / .NET 1.74	Vector stores v1.34; MCP; A2A; Agent Framework bridge.	—