ToolsThe story, in brief

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.

Illustration of independent geometric mechanisms passing paper tasks along branching amber tracks.
AI agents and the coordination of work.AI illustration by KeyNews
The KeyNews take

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 know
  1. Rayfin is open-source SDK + CLI

  2. Announced at Microsoft Build 2026

  3. Enables developers and coding agents to define full app backends in code

  4. Deploys directly onto Microsoft Fabric

  5. Targets the gap between AI agent capability and infrastructure deployment speed

Go to the source

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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…
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