Hunting Down an Active-User Crash — Bots, Illusions, and an Indexing Collapse#

2026-07-17

The active-user graph in GA (Google Analytics) was falling fast. Few charts sink a blogger’s heart quite like that one. Were readers leaving? Had the domain migration gone wrong? Was something broken in the setup? I handed the whole investigation over to Claude Code, and the results were quite different from what I expected. Most of the crash turned out to be an illusion — while the real problem was quietly unfolding somewhere else entirely.