Microsoft launches Rayfin to let developers and agents build app back ends on Fabric
Microsoft just handed AI agents a backend. Rayfin lets coding agents spin up production infrastructure in code—no DevOps required.

Why it matters
Rayfin closes a critical gap in the AI-native development stack: as agents become capable of writing full applications, they need a way to deploy infrastructure at the same speed. This is infrastructure-as-code for the agentic era, and it ships on Fabric.
The key facts
5 to knowRayfin is open-source SDK + CLI
Announced at Microsoft Build 2026
Enables developers and coding agents to define full app backends in code
Deploys directly onto Microsoft Fabric
Targets the gap between AI agent capability and infrastructure deployment speed
Go to the source
SiliconAnglesiliconangle.com
Publisher excerpt: Microsoft Corp. today introduced Rayfin, an open-source software development kit and command-line interface that lets developers and coding agents define an entire application back end in code and deploy it onto Microsoft Fabric. Announced at Microsoft Build 2026, Rayfin targets a gap that has…