180 million-plus developers now work and build on GitHub. Their definition is “[a]nyone with a GitHub account.” Let’s not overthink it, just yet, and instead go with what they’re saying. If 2025 had a theme, it would be growth. Every second, more than one new developer on average joined GitHub–over 36 million in the past year. It’s our fastest absolute growth rate yet and 180 million-plus developers now work and build on GitHub.

Plus, a lot of talk about Java and Spring in large organizations.

October, 2010, probably at an airport.

I’m always trying to find how many apps are written (and, of course, running) in Java. Here are recent numbers I have on hand: “[N]early 70% of respondents say that more than half of their applications are built with Java or run on a JVM.” Azul survey, 2025. “98% of companies we surveyed use Java, with 57% saying it is the backbone of most of their application and infrastructure estate.

Here are some thoughts after a week of using Claude Skills. JasonJ in the SDT Slack says: I’d tl;dr Claude CLI skills as “low/no/english code MCPs'”. Seems helpful in the way that local utility scripts are today. That is a good way of putting it. I haven’t done heavy experimenting, but I think there’s a distinction between: (1) The Skill has no code, except maybe code fragments. Most of it is just a SKILL.

From my Cloud Foundry Day EU talk. See the slides if you want to zoom in and click on the citations. My friends at Rabobank corrected a figure: they support 300 developer teams, not just developers.

Next week in Frankfurt, October 7th, 2025: Cloud Foundry Day. I’m speaking in my ongoing attempts to help out the CF community with…marketing! Here is the agenda:

The talk discusses how platform engineers can navigate AI support, emphasizing the need for middleware, customer engagement, and rapid experimentation.

Recent discussions on enterprise AI reveal that while individual workers may benefit from productivity gains, the overall ROI for companies remains unclear and challenging to measure.