MyJourney: create product demos without wasting a day
GemLab has several projects running at the same time, and all of them change from week to week. Then someone asks how Mother is doing, and the honest…
Codeminer42's Engineering Blog
What Codeminer42 engineers dig up at work: field notes on Rails, AI tooling, security, and keeping product teams shipping.

GemLab has several projects running at the same time, and all of them change from week to week. Then someone asks how Mother is doing, and the honest…
Customer support is one of those areas where the toolset shapes not just agent efficiency, but the entire quality of the customer relationship. When the CS team at…
Memory and context engineering for a long-running AI agent: how BETanIA got a diary, a mood, grudges, and a compaction strategy - and won our World Cup pool.
In April 2025, Tropical on Rails, the Rails conference in São Paulo, said yes to one of our talks for the first time. A few months later, one…
A few weeks ago, I wrote Stop Reading AI Code, Start Measuring It: A Rails Playbook. The idea there was that if you stop hand-reviewing every line of…
I went on a tour of Ruby concurrency while preparing a RubyConf talk on Ractors. Going in, I knew Puma, Falcon, and Unicorn. Coming out, I'd added Pitchfork…