I Replaced 2,000 Lines of Go Mocks With 200 Lines of Fakes

Book: Hexagonal Architecture in Go Also by me: Thinking in Go (2-book series) — Complete Guide to Go Programming + Hexagonal Architecture in Go My project: Hermes IDE | GitHub — an IDE for developers who ship with Claude Code and other AI coding tools Me: xgabriel.com | GitHub A team I work with had a Go service with roughly 90 test files. Good coverage numbers. Green CI. The kind of metrics that make engineering managers smile in sprint reviews. Then they changed the signature of one repository