Aggregate Boundaries in Go: One Rule That Beats 90% of DDD Books

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 You've seen this Slack thread. A team is six months into a "DDD rewrite," there's a 400-page book on someone's laptop, and the open question is still: should Inventory be inside the Order aggregate, or outside? Senior engi