Codeminer42's Engineering Blog
What Codeminer42 engineers dig up at work: field notes on Rails, AI tooling, security, and keeping product teams shipping.
In my last post, I locked a coding agent in a sandbox with a programming language it had never seen, and watched it figure the language out from a few apps. To my surprise, it did really well. But that…
There's a question that keeps coming back every time some colleagues and I see a coding agent doing something impressive: "ok, but it has seen millions of examples…
In October 2026, a researcher found out that eight intermediate certificates issued by eMudhra (a certificate authority, one of the ~140 organizations whose signature your browser and operating…
An agent opens a file, sees a strange-looking loop, and "simplifies" it. The loop was strange on purpose. Someone had chosen it months earlier, after an incident, in…
A few weeks ago I picked up a ticket that said, more or less, "implement the auth layer." The application already had authentication working, so the first job…
The comment started with three words: This breaks prod. It was a PR of about five hundred lines -- in a repo I had just encountered, and I…
