The Bugs Were Hiding Behind the Right Answers

Two colleagues who owned a critical subsystem left within a week of each other, and a leftover task in their area — one I barely knew — landed on me. The migration plan for it was freshly AI-generated, and what I didn’t fully trust was my own grasp of it. So I asked my AI to quiz me — not to grade me, just to see what I’d actually absorbed. ...

2026-06-07 · 7 min · Kun Lu

The Most Dangerous Hallucination Is the One That Sounds Right

Your AI coding assistant quotes a specific line from a specific file. The file is real. The section name is close. The quote sounds exactly right. But the line doesn’t exist — and that’s precisely what makes it dangerous. A Quote That Never Was I’ve been working with Claude Code on a large healthcare integration project — syncing an on-premise practice management system (I’ll call it “SimplePractice”) with a cloud FHIR platform. Over several weeks, we’ve built push/pull sync, environment tooling, documentation, and dozens of shell scripts. It’s been genuinely productive. ...

2026-04-08 · 4 min · Kun Lu