Guidelines, not rules. Here's the difference — and why it matters.
What is SOLID?
SOLID is a set of software design guidelines — not hard rules, but principles that guide how we organize our code.
The goal is simple: as your codebase grows and your team scales, things should get easier to change, not harder. SOLID is what makes that possible.
Five principles. One goal. Let's walk through each one with real code.







