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skills/code-analysis/SKILL.md

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+---
+name: code-analysis
+description: Provides methodologies, metrics, and best practices for analyzing code structure, complexity, and quality
+version: 1.0.0
+---
+
+## 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.