Testing

Green CI doesn't mean working software. Flaky tests, mocked dependencies, and coverage theater have turned CI into a checkbox ritual.

Every team believes their staging environment reflects production. Almost none of them do. Here is how to test in production safely instead.

Staging exists to catch problems before production. Most staging environments catch the wrong problems and miss the real ones, because they differ from production in exactly the ways that matter.

Flaky CI doesn't just slow you down. It teaches engineers to ignore red. Once that habit forms, your test suite stops being a safety net.

Your AI feature passes 100% of unit tests and ships broken to users every other week. Here's why, and how to actually test LLM-powered systems.