The Hidden Cost of AI-Generated Tests — Why 90% Coverage Means Nothing

AI can write tests in seconds, but coverage numbers are lying to you. Here’s how tautological, implementation-coupled tests let a real bug survive for three weeks.

March 20, 2026 · 5 min · Zidane

My Team Vibe-Coded a Feature. Three Weeks Later, I'm Still Cleaning Up

Three weeks ago, one of my engineers shipped a feature in two hours that would’ve taken a day. I praised him in the standup. Last week we spent four days unraveling the cascading issues it created. Here’s what vibe coding actually costs a team — and how I’ve changed our process since.

February 28, 2026 · 6 min · Zidane