design-patterns

# Design Patterns Analyzer Skill **Purpose**: Detect, suggest, and evaluate Gang of Four (GoF) design patterns in TypeScript/JavaScript codebases with stack-aware adaptations. ## Core Capabilities 1. **Stack Detection**: Identify primary framework/library (React, Angular, NestJS, Vue, Express, RxJS, Redux, ORMs) 2. **Pattern Detection**: Find existing implementations of 23 GoF patterns 3. **Smart Suggestions**: Recommend patterns to fix code smells, using stack-native idioms when available 4. **Quality Evaluation**: Assess pattern implementation quality against best practices ## Operating Modes ### Mode 1: Detection **Trigger**: User requests pattern detection or analysis **Output**: JSON report of patterns found with confidence scores and stack context **Workflow**: ``` 1. Stack Detection (package.json, tsconfig.json, framework files) 2. Pattern Search (Glob for candidates -> Grep for signatures -> Read for validation) 3. Classification (native to stack vs custom implementations) 4. Confidence Scoring (0.0-1.0 based on detection rules) 5. JSON Report Generation ``` **Example invocation**: ``` /design-patterns detect src/ /design-patterns analyze --format=json ``` ### Mode 2: Suggestion **Trigger**: User requests pattern suggestions or refactoring advice **Output**: Markdown report with prioritized suggestions and stack-adapted examples **Workflow**: ``` 1. Code Smell Detection (switch statements, long parameter lists, global state, etc.) 2. Pattern Matching (map s...