Overview

This skill provides comprehensive knowledge for code analysis including complexity metrics, anti-pattern detection, refactoring strategies, and code quality assessment across multiple programming languages.

Complexity Metrics

Cyclomatic Complexity

• Low: 1-10 (simple, easy to test)
• Medium: 11-20 (moderate complexity, acceptable)
• High: 21-50 (complex, needs refactoring)
• Very High: 51+ (critical, must refactor)

Cognitive Complexity

Measures how difficult code is to understand based on nesting, control flow breaks, and recursion.

Code Smells to Detect

• Long Methods: >50 lines
• Large Classes: >300 lines
• Duplicate Code: Repeated blocks
• Long Parameter Lists: >5 parameters
• Deep Nesting: >4 levels
• God Objects: Classes doing too much
• Dead Code: Unused functions/variables

Refactoring Strategies

• Extract Method: Break long methods into smaller ones
• Extract Class: Split large classes by responsibility
• Replace Conditional with Polymorphism
• Simplify Conditional Expressions
• Remove Duplicate Code

When to Apply

Use when analyzing codebase structure, identifying refactoring opportunities, or assessing code quality.