Developed an LLD (Low-Level Design) skill by synthesizing modern software design principles from:
《Simple Made Easy》✅
《A Philosophy of Software Design, 2nd Edition》✅(APOSD2)
《Parse, Don't Validate》✅
《Domain Modeling Made Functional》✅(DMMF)
《Functional Core, Imperative Shell》✅(FCIS)
The skill distills these principles into a practical, reusable framework for designing software that minimizes accidental complexity, makes invalid states unrepresentable, keeps domain logic pure, and isolates side effects and dependencies.