Global Best Practices

Priority: P0 (FOUNDATIONAL)

Core Principles

• SOLID: Follow SRP (One reason to change), OCP (Open to extension), LSP, ISP, DIP.
• KISS/DRY/YAGNI: Favor readability. Abstract repeated logic. No " in case" code.
• Naming: Use intention-revealing names (isUserAuthenticated > checkUser). Match language casing.

Code Hygiene

• Size Limits: Functions < 30 lines. Services < 600 lines. Utils < 400 lines.
• Early Returns: Use guard clauses. Avoid deep nesting.
• Comments: Explain why, not what. Refactor bad code; don't comment it.
• Input: Validate/sanitize all external inputs.

Anti-Patterns