From $43 Blunders to $5.50 Wisdom: Lessons in Cloud Index Optimization

Last month's Anthropic bill hit $312. Sixty percent of it traced back to a single 6-hour window when I was doing an in-place Vectorize index rebuild. Here's the part I didn't expect: the rebuild didn't throw errors. Queries returned results, scores just quietly dropped from 0.78 to 0.61. My agent in