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name: complexity description: Analyzes code for complexity issues. Use when code feels hard to understand, reviewing maintainability, or planning refactoring. allowed-tools: Read, Grep, Glob

Complexity Analyzer

Complexity is the enemy. Good design reduces the complexity developers face.

Three Symptoms

1. Change Amplification: Simple change requires modifications in many places

   • Duplicated magic values, scattered configuration, tight coupling

2. Cognitive Load: Too much knowledge needed to complete a task

   • Too many parameters, deep nesting, complex conditionals, hidden state, non-obvious side effects

3. Unknown Unknowns: Not obvious what to modify or what info is needed

   • Missing docs on non-obvious behavior, implicit contracts, hidden dependencies, action-at-a-distance

Red Flags

• Shallow modules (interface nearly as complex as implementation)
• Information leakage (implementation details in interfaces)
• Pass-through methods (just call another method)
• Conjoined methods (must be called together)
• Temporal decomposition (split by execution order, not information hiding)

Output

Complexity level (Low/Medium/High/Critical), findings with location/symptom/impact/suggestion, prioritized refactoring recommendations.