"Beating 250,000 Mental Comparisons: A Cross-Domain Engineer's Entity Resolution Case Study"

TL;DR Operations/Systems engineer recently moved to the software side via AI collaboration. Built a domain-specific entity resolution tool in a handful of evening sessions with Claude Code. Caught about 99.2% of human-detected reconciliation errors when replayed against 8 weeks of historical data. Turned a "skilled-veterans-only" weekly task into something anyone on the team can run. Design retrofitted unexpectedly well to dual process theory, Gestalt psychology, and anchoring-bias defense. Sour