Rob Kerr's Blog

Secure Microsoft Fabric with Private Link (Workspace-Level Setup + Architecture)

This post is a walk-through of building a Fabric Tenant that has a private-link protected workspace with Lakehouse data, and a **non** private-link workspace with a Semantic Model and Power BI reports.

Hot Take on how GPT-5.2 compares in document summarization

Open AI's GPT-5.2 dropped, and is available on my accounts as of this morning. Wanted to share my initial hot-take how it performs in business applications compared to older models like 5.1, 4.1, and Llama-3.1 as well as gpt-oss-20b.

Building Custom MCP Tools for Azure AI Foundry Agents (with Cosmos DB GraphRAG)

In this post I'll talk through the architecture and implementation details for building a complete custom MCP tool solution using Python. Then in the accompanying video we'll create an Azure AI Foundry Agent to test the MCP Server.

Today’s Frontier Model Race Mirrors Early Internet and Smartphone Eras

AI is in its early days of adoption and platform realization. Despite the noise surrounding model benchmarks, context window sizes, and chat interfaces, the real platform shift hasn’t happened yet.

Building a GraphRAG App: Concepts, Code, and Demo

In this post we’re going to talk about GraphRag — one of the techniques we can use to add knowledge to the context of a large language model prompt. We'll go through the concepts, theory, and end with a video walk-through of a fully functional full-stack GraphRAG application.

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