Structuring Project Layout

When to use

• Starting a new Node.js TypeScript repo
• Adding a new feature module
• Refactoring tangled imports and unclear boundaries

Core rules

1. Three-layer layout: src/domain/, src/application/, src/infrastructure/
2. Feature modules inside src/features/<feature-name>/ with own layers
3. Shared kernel in src/shared/ (types, errors, contracts, constants)
4. Barrel files (index.ts) in every folder for clean imports
5. Path aliases: @domain/*, @application/*, @infrastructure/*, @shared/*
6. No cross-feature imports; use @shared/contracts

Reference shape (TypeScript)