The Hidden Pitfalls of pnpm Workspaces in Production CI

pnpm workspaces solves real problems in TypeScript monorepos, but its documentation hides critical pitfalls that appear only in real CI/CD environments like Railway. Phantom dependencies and dependency resolution issues work locally due to cached stores but fail in clean CI builds—a gap that catches even experienced teams. This analysis reveals the production realities of pnpm workspaces that standard guides omit, making it essential reading for anyone deploying monorepos at scale.