Cursor Rules for Better AI Development

Argues that community .cursor/rules directories are underdocumented and lack practical code examples — most are shallow lists of dos and don’ts without rationale.
Core recommendation: declare explicit return types on top-level module functions so AI assistants can understand function purpose without reading the implementation; exclude JSX components from this rule.
Broader principle: cursor rules are a communication layer between human intent and AI execution — investing in them pays compound returns on every subsequent AI interaction in the project.