I tried to evaluate how AI has affected frontend development at our company. I looked at all 7 of our projects and 5 developers who use AI in their work. The general feeling was that we'd started writing code faster. But it was only a feeling — I wanted either confirmation or refutation. Management is over the moon about how wonderful AI is, and even gave us corporate access to Cursor and Claude Code. They love to bring this up at every All Hands meeting, but nobody has actually shown any proof that adopting AI has had a real impact on how much useful-to-our-users code we ship. The Metric For the metric, I decided to simply take the amount of code written. I know that's a bit crude, but I don't see how to measure this objectively otherwise (suggestions welcome in the comments). Methodology Take four six-month periods: Last six months (2025-10-01 → 2026-03-31) — most of our developers actively used tools like Cursor and Claude Code.…