A Combat Manual for Shipping Changes Without Breaking Everything

Tue, 19 May 2026 00:00:00 +0000

Never deploy on Fridays.

In many companies, that rule isn’t written anywhere — but it surfaces in the back of anyone’s head who has ever watched a deployment go sideways.

And around that fear, layers have piled up: extra environments, meetings, approvals… all to avoid making the front page of “Production Down Again” on Monday at 9:01 AM.

The problem is that the business doesn’t care about superstitions. It wants changes. New features, new flows, new integrations, bug fixes, performance improvements. It wants the application to move.

uv without fear: designing your Python platform layer

Tue, 19 May 2026 00:00:00 +0000

We’ve been arguing about the same things in Python for twenty years. Whether to use virtualenv or venv. Whether pip or pip-tools is the right call. Whether Poetry is deprecated or just in a bad mood. Whether pyenv is for serious engineers or just people with too much time on their hands.

Open any repo from three projects ago and you’ll find a Frankenstein held together with duct tape: a Makefile that activates a venv, a hand-maintained requirements.txt, a requirements-dev.txt that nobody’s touched since 2022, and a Dockerfile that does pip install with versions eyeballed into place.

DevOps on I am Lino

A Combat Manual for Shipping Changes Without Breaking Everything

uv without fear: designing your Python platform layer