The Problem

I recently came across a problem with a complex BitTalk solution being built in an Azure DevOps Pipeline. It had been working fine, but it started to fail with error related to failing to copy built DLLs from the obj folder to the bin folder because it said the files were in use by MSBuild.

The Analysis

I …

lewiswrites http://lewispen.github.io/posts/fabric-capacity-conundrum/ -

The Question That Started It All

I went down a surprisingly deep rabbit hole recently trying to answer a deceptively simple question: Do we need one Microsoft Fabric capacity, or separate ones for Dev/Test/Prod?

On paper, this sounds like a sizing …

Whilst at DDD South West I did a very enjoyable panel podcast recording for Dan Clarke’s Unhandled Exception podcast on the subject of the impact of AI on software development.

I am please to say that the recording of the panel has just been published. So why not have a listen to it, or any of Dan’s back …

Thanks to everyone who came to my session ‘Why don’t people seem to be able to diagnose problems these days?` at yesterday’s DDD South West.

I don’t believe there is a recording of this session from any event where I have delivered it, but you can find a copy of my slides, with all my other …

AWS Summit London 2026

AWS Summit London 2026 was a compact, fast-moving event with practical sessions. The theme was “Innovate at Scale,” and the show was heavy on AI, sustainability, and hybrid cloud.

Opening Keynote

• Main focus: resilience, scale, and customer-driven innovation.
• Graviton4 expansion: …

Problem Space

In most Infrastructure as Code teams, Bicep quality checks start to look mature as soon as linting and deployment validation are in place. In practice, there is still a blind spot: logic-level testing of exported functions, types, and variables.

Most teams validate by deploying to a subscription and …