fcc6f2dba3
Comprehensive GoF design patterns analyzer with stack-aware suggestions. **Features**: - Detects 23 GoF patterns (Creational, Structural, Behavioral) - Stack detection (React, Angular, NestJS, Vue, Express, RxJS, Redux, ORMs) - Code smell detection with pattern suggestions - Quality evaluation (5 criteria scoring) - Prefers stack-native alternatives (e.g., React Context over Singleton) **Structure**: - 9 files: SKILL.md + reference docs + detection rules + evaluation checklists - 3 operating modes: Detection, Suggestion, Evaluation - Pattern-specific documentation for all 23 GoF patterns **Documentation**: - Added comprehensive example in guide section 5.4 - Updated examples/README.md with skill entry - Updated template count: 65 → 66 **Use cases**: - Analyze existing patterns in codebase - Suggest refactoring with stack-native patterns - Evaluate pattern implementation quality Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
769 lines
20 KiB
YAML
769 lines
20 KiB
YAML
version: "1.0.0"
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description: Detection rules and heuristics for identifying design patterns in TypeScript/JavaScript code
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# Detection Strategy:
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# 1. Glob Phase: Find candidate files by naming convention
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# 2. Grep Phase: Search for primary and secondary signals
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# 3. Read Phase: Validate structure and relationships
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# 4. Confidence Scoring: Aggregate signal strengths
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# Creational Patterns
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creational:
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singleton:
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naming_conventions:
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- "*Singleton*.ts"
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- "*Manager.ts"
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- "*Service.ts"
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- "*Client.ts"
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- "*Config.ts"
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- "*Instance.ts"
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primary_signals:
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- pattern: "private\\s+constructor"
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weight: 0.4
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description: "Private constructor prevents direct instantiation"
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- pattern: "static\\s+getInstance\\s*\\("
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weight: 0.35
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description: "Static getInstance method is canonical singleton signature"
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- pattern: "private\\s+static\\s+\\w+:\\s*\\w+"
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weight: 0.25
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description: "Private static instance field"
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secondary_signals:
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- pattern: "if\\s*\\(!\\w+\\.instance\\)"
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weight: 0.15
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description: "Lazy initialization check"
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- pattern: "return\\s+\\w+\\.instance"
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weight: 0.10
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description: "Returns singleton instance"
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typescript_specific:
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- pattern: "private\\s+static\\s+instance\\?:\\s*\\w+"
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description: "TypeScript optional instance field"
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- pattern: "public\\s+static\\s+getInstance\\(\\):\\s*\\w+"
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description: "Explicit return type annotation"
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anti_patterns:
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- pattern: "new\\s+\\w+\\(\\).*getInstance"
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description: "Creating new instance inside getInstance (wrong)"
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confidence_threshold: 0.70
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minimum_signals: 2
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factory-method:
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naming_conventions:
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- "*Factory.ts"
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- "*Creator.ts"
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- "*Provider.ts"
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- "*Builder.ts"
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primary_signals:
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- pattern: "create\\w+\\s*\\([^)]*\\):\\s*\\w+"
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weight: 0.35
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description: "create* method returning interface/type"
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- pattern: "abstract\\s+create\\w+"
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weight: 0.30
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description: "Abstract factory method"
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- pattern: "interface\\s+\\w+Factory"
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weight: 0.20
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description: "Factory interface definition"
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secondary_signals:
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- pattern: "class\\s+\\w+\\s+extends\\s+\\w+Factory"
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weight: 0.15
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description: "Concrete factory inheriting from abstract"
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- pattern: "return\\s+new\\s+\\w+\\("
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weight: 0.10
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description: "Factory returns new instance"
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- pattern: "switch\\s*\\([^)]*type[^)]*\\)"
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weight: 0.15
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description: "Type-based creation logic"
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typescript_specific:
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- pattern: "create\\w+<T[^>]*>"
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description: "Generic factory method"
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confidence_threshold: 0.65
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minimum_signals: 2
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abstract-factory:
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naming_conventions:
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- "*AbstractFactory.ts"
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- "*Factory.ts"
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- "*FactoryInterface.ts"
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primary_signals:
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- pattern: "abstract\\s+class\\s+\\w+Factory"
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weight: 0.30
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description: "Abstract factory class"
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- pattern: "interface\\s+\\w+Factory\\s*\\{[^}]*create\\w+[^}]*create\\w+"
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weight: 0.35
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description: "Factory interface with multiple create methods"
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- pattern: "create\\w+\\s*\\([^)]*\\):\\s*\\w+.*create\\w+\\s*\\([^)]*\\):\\s*\\w+"
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weight: 0.25
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description: "Multiple factory methods"
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secondary_signals:
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- pattern: "class\\s+\\w+\\s+implements\\s+\\w+Factory"
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weight: 0.15
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description: "Concrete factory implementing interface"
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- pattern: "family|related|product"
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weight: 0.10
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description: "Domain language suggesting related objects"
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confidence_threshold: 0.70
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minimum_signals: 2
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builder:
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naming_conventions:
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- "*Builder.ts"
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- "*ConfigBuilder.ts"
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- "*QueryBuilder.ts"
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primary_signals:
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- pattern: "\\w+\\s*\\([^)]*\\):\\s*(this|\\w+Builder)"
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weight: 0.30
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description: "Fluent interface returning this or builder type"
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- pattern: "build\\s*\\(\\):\\s*\\w+"
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weight: 0.35
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description: "Build method returning final product"
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- pattern: "with\\w+\\s*\\([^)]*\\):\\s*this"
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weight: 0.25
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description: "with* methods for setting properties"
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secondary_signals:
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- pattern: "set\\w+\\s*\\([^)]*\\):\\s*this"
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weight: 0.15
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description: "set* methods returning this"
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- pattern: "private\\s+\\w+\\?:\\s*\\w+"
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weight: 0.10
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description: "Optional private fields being built up"
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typescript_specific:
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- pattern: "class\\s+\\w+Builder<T"
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description: "Generic builder"
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- pattern: "\\): this \\{"
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description: "Explicit 'this' return type"
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confidence_threshold: 0.70
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minimum_signals: 2
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prototype:
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naming_conventions:
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- "*Prototype.ts"
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- "*Cloneable.ts"
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primary_signals:
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- pattern: "clone\\s*\\(\\):\\s*\\w+"
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weight: 0.45
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description: "Clone method signature"
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- pattern: "Object\\.create\\("
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weight: 0.25
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description: "Using Object.create for prototypal inheritance"
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- pattern: "JSON\\.parse\\(JSON\\.stringify\\("
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weight: 0.20
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description: "Deep clone via JSON (simple approach)"
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secondary_signals:
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- pattern: "\\.\\.\\."
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weight: 0.10
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description: "Spread operator for shallow copy"
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- pattern: "structuredClone\\("
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weight: 0.15
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description: "Modern structuredClone API"
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confidence_threshold: 0.60
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minimum_signals: 1
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# Structural Patterns
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structural:
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adapter:
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naming_conventions:
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- "*Adapter.ts"
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- "*Wrapper.ts"
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primary_signals:
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- pattern: "class\\s+\\w+Adapter\\s+implements\\s+\\w+"
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weight: 0.35
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description: "Adapter implementing target interface"
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- pattern: "private\\s+\\w+:\\s*\\w+;"
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weight: 0.25
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description: "Holds reference to adaptee"
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- pattern: "constructor\\([^)]*adaptee[^)]*\\)"
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weight: 0.30
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description: "Adaptee injected in constructor"
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secondary_signals:
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- pattern: "this\\.\\w+\\.\\w+\\("
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weight: 0.15
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description: "Delegates to adaptee"
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- pattern: "convert|transform|map"
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weight: 0.10
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description: "Conversion language in methods"
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confidence_threshold: 0.65
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minimum_signals: 2
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bridge:
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naming_conventions:
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- "*Bridge.ts"
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- "*Abstraction.ts"
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- "*Implementation.ts"
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primary_signals:
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- pattern: "protected\\s+impl:\\s*\\w+Implementation"
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weight: 0.35
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description: "Abstraction holds implementation reference"
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- pattern: "interface\\s+\\w+Implementation"
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weight: 0.30
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description: "Implementation interface"
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- pattern: "constructor\\([^)]*implementation[^)]*\\)"
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weight: 0.25
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description: "Implementation injected"
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secondary_signals:
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- pattern: "this\\.impl\\."
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weight: 0.15
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description: "Delegates to implementation"
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confidence_threshold: 0.60
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minimum_signals: 2
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composite:
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naming_conventions:
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- "*Composite.ts"
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- "*Component.ts"
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- "*Container.ts"
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- "*Group.ts"
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primary_signals:
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- pattern: "private\\s+children:\\s*\\w+\\[\\]"
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weight: 0.35
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description: "Collection of child components"
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- pattern: "add\\s*\\([^)]*\\):|remove\\s*\\([^)]*\\):"
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weight: 0.30
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description: "Methods to manage children"
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- pattern: "abstract\\s+class\\s+\\w+Component"
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weight: 0.25
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description: "Abstract component class"
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secondary_signals:
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- pattern: "children\\.forEach\\(|children\\.map\\("
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weight: 0.15
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description: "Iterates over children"
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- pattern: "getChild\\(|getChildren\\("
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weight: 0.10
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description: "Access to children"
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typescript_specific:
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- pattern: "children:\\s*Array<\\w+>"
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description: "Typed array of components"
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confidence_threshold: 0.70
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minimum_signals: 2
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decorator:
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naming_conventions:
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- "*Decorator.ts"
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- "*Wrapper.ts"
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primary_signals:
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- pattern: "class\\s+\\w+Decorator\\s+implements\\s+\\w+"
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weight: 0.30
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description: "Decorator implements same interface"
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- pattern: "protected\\s+wrapped:\\s*\\w+"
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weight: 0.30
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description: "Holds reference to wrapped object"
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- pattern: "constructor\\([^)]*wrapped[^)]*\\)"
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weight: 0.25
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description: "Wrapped object injected"
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secondary_signals:
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- pattern: "this\\.wrapped\\.\\w+\\("
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weight: 0.20
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description: "Delegates to wrapped object"
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- pattern: "super\\(wrapped\\)"
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weight: 0.15
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description: "Passes wrapped to base decorator"
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typescript_specific:
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- pattern: "@\\w+"
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description: "TypeScript decorator syntax (different usage)"
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confidence_threshold: 0.65
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minimum_signals: 2
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facade:
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naming_conventions:
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- "*Facade.ts"
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- "*API.ts"
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- "*Interface.ts"
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- "*Service.ts"
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primary_signals:
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- pattern: "private\\s+\\w+Service:\\s*\\w+;[^}]*private\\s+\\w+Service:\\s*\\w+"
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weight: 0.35
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description: "Multiple subsystem dependencies"
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- pattern: "constructor\\([^)]*,\\s*[^)]*,\\s*[^)]*\\)"
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weight: 0.25
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description: "Multiple injected dependencies"
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secondary_signals:
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- pattern: "this\\.\\w+Service\\.\\w+\\([^)]*\\);[^}]*this\\.\\w+Service\\.\\w+\\("
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weight: 0.20
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description: "Coordinates multiple subsystems"
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- pattern: "public\\s+async\\s+\\w+\\([^)]*\\)"
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weight: 0.10
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description: "Simplified public interface"
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confidence_threshold: 0.60
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minimum_signals: 2
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flyweight:
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naming_conventions:
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- "*Flyweight.ts"
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- "*Pool.ts"
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- "*Cache.ts"
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primary_signals:
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- pattern: "private\\s+static\\s+pool:\\s*Map"
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weight: 0.35
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description: "Shared pool of flyweights"
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- pattern: "getFlyweight\\s*\\([^)]*\\):\\s*\\w+"
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weight: 0.30
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description: "Factory method for shared objects"
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- pattern: "if\\s*\\(!pool\\.has\\([^)]*\\)\\)"
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weight: 0.25
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description: "Check if flyweight exists before creating"
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secondary_signals:
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- pattern: "intrinsic|extrinsic"
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weight: 0.15
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description: "Domain language for shared/unique state"
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confidence_threshold: 0.65
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minimum_signals: 2
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proxy:
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naming_conventions:
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- "*Proxy.ts"
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primary_signals:
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- pattern: "class\\s+\\w+Proxy\\s+implements\\s+\\w+"
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weight: 0.30
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description: "Proxy implements same interface as real subject"
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- pattern: "private\\s+realSubject:\\s*\\w+"
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weight: 0.30
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description: "Holds reference to real subject"
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- pattern: "lazy|cache|access|log"
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weight: 0.20
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description: "Proxy purpose keywords"
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secondary_signals:
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- pattern: "if\\s*\\(!this\\.realSubject\\)"
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weight: 0.15
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description: "Lazy initialization"
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- pattern: "this\\.realSubject\\.\\w+\\("
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weight: 0.15
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description: "Delegates to real subject"
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typescript_specific:
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- pattern: "new\\s+Proxy\\("
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description: "JavaScript Proxy object"
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confidence_threshold: 0.65
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minimum_signals: 2
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# Behavioral Patterns
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behavioral:
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chain-of-responsibility:
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naming_conventions:
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- "*Handler.ts"
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- "*Middleware.ts"
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- "*Chain.ts"
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primary_signals:
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- pattern: "protected\\s+next:\\s*\\w+Handler"
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weight: 0.35
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description: "Reference to next handler"
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- pattern: "setNext\\s*\\([^)]*\\):\\s*\\w+Handler"
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weight: 0.30
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description: "Method to set next handler"
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- pattern: "handle\\s*\\([^)]*\\):"
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weight: 0.25
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description: "Handle method"
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secondary_signals:
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- pattern: "if\\s*\\(this\\.next\\)"
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weight: 0.15
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description: "Checks if next handler exists"
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- pattern: "this\\.next\\.handle\\("
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weight: 0.15
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description: "Passes request to next"
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confidence_threshold: 0.70
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minimum_signals: 2
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command:
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naming_conventions:
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- "*Command.ts"
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- "*Action.ts"
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primary_signals:
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- pattern: "interface\\s+\\w+Command\\s*\\{[^}]*execute"
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weight: 0.35
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description: "Command interface with execute"
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- pattern: "execute\\s*\\(\\):"
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weight: 0.30
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description: "Execute method"
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- pattern: "undo\\s*\\(\\):"
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weight: 0.25
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description: "Undo method for reversibility"
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secondary_signals:
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- pattern: "private\\s+receiver:\\s*\\w+"
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weight: 0.15
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description: "Holds receiver reference"
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- pattern: "history|stack"
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weight: 0.10
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description: "Command history tracking"
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confidence_threshold: 0.65
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minimum_signals: 2
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iterator:
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naming_conventions:
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- "*Iterator.ts"
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primary_signals:
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- pattern: "\\[Symbol\\.iterator\\]\\(\\)"
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weight: 0.40
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description: "JavaScript iterator protocol"
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- pattern: "next\\s*\\(\\):\\s*\\{\\s*value[^}]*done"
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weight: 0.35
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description: "Iterator next method"
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- pattern: "function\\*|\\*\\w+\\s*\\("
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weight: 0.25
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description: "Generator function"
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secondary_signals:
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- pattern: "yield"
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weight: 0.15
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description: "Generator yield"
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- pattern: "implements\\s+Iterator<"
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weight: 0.15
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description: "Implements Iterator interface"
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confidence_threshold: 0.65
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minimum_signals: 1
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mediator:
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naming_conventions:
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- "*Mediator.ts"
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- "*Controller.ts"
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- "*Coordinator.ts"
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primary_signals:
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- pattern: "class\\s+\\w+Mediator"
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weight: 0.30
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description: "Mediator class"
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- pattern: "private\\s+colleagues:\\s*\\w+\\[\\]"
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weight: 0.30
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description: "Collection of colleagues"
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- pattern: "notify\\s*\\([^)]*sender[^)]*\\)"
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weight: 0.30
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description: "Notify method with sender"
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secondary_signals:
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- pattern: "register\\w+\\(|add\\w+\\("
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weight: 0.15
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description: "Register colleagues"
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confidence_threshold: 0.65
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minimum_signals: 2
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memento:
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naming_conventions:
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- "*Memento.ts"
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- "*Snapshot.ts"
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- "*Caretaker.ts"
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primary_signals:
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- pattern: "save\\s*\\(\\):\\s*\\w+Memento"
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weight: 0.35
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description: "Save state to memento"
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- pattern: "restore\\s*\\([^)]*memento[^)]*\\)"
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weight: 0.35
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description: "Restore from memento"
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- pattern: "class\\s+\\w+Memento"
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weight: 0.20
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description: "Memento class"
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secondary_signals:
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- pattern: "private\\s+state:"
|
|
weight: 0.15
|
|
description: "Encapsulated state"
|
|
|
|
- pattern: "history:\\s*\\w+\\[\\]"
|
|
weight: 0.10
|
|
description: "History of mementos"
|
|
|
|
confidence_threshold: 0.70
|
|
minimum_signals: 2
|
|
|
|
observer:
|
|
naming_conventions:
|
|
- "*Observer.ts"
|
|
- "*Subject.ts"
|
|
- "*Publisher.ts"
|
|
- "*Subscriber.ts"
|
|
- "*Event*.ts"
|
|
|
|
primary_signals:
|
|
- pattern: "subscribe\\s*\\([^)]*\\):|attach\\s*\\([^)]*\\):"
|
|
weight: 0.30
|
|
description: "Subscribe method"
|
|
|
|
- pattern: "unsubscribe\\s*\\([^)]*\\):|detach\\s*\\([^)]*\\):"
|
|
weight: 0.25
|
|
description: "Unsubscribe method"
|
|
|
|
- pattern: "notify\\s*\\(\\):|emit\\s*\\("
|
|
weight: 0.30
|
|
description: "Notify/emit method"
|
|
|
|
secondary_signals:
|
|
- pattern: "private\\s+observers:\\s*\\w+\\[\\]"
|
|
weight: 0.20
|
|
description: "Collection of observers"
|
|
|
|
- pattern: "observers\\.forEach\\("
|
|
weight: 0.15
|
|
description: "Iterates over observers to notify"
|
|
|
|
typescript_specific:
|
|
- pattern: "Subject<"
|
|
description: "RxJS Subject (common in Angular/React)"
|
|
|
|
confidence_threshold: 0.70
|
|
minimum_signals: 2
|
|
|
|
state:
|
|
naming_conventions:
|
|
- "*State.ts"
|
|
- "*Context.ts"
|
|
|
|
primary_signals:
|
|
- pattern: "interface\\s+\\w+State"
|
|
weight: 0.30
|
|
description: "State interface"
|
|
|
|
- pattern: "private\\s+state:\\s*\\w+State"
|
|
weight: 0.30
|
|
description: "Context holds current state"
|
|
|
|
- pattern: "setState\\s*\\([^)]*\\):|changeState\\s*\\([^)]*\\):"
|
|
weight: 0.30
|
|
description: "Method to change state"
|
|
|
|
secondary_signals:
|
|
- pattern: "this\\.state\\.handle\\("
|
|
weight: 0.15
|
|
description: "Delegates to state"
|
|
|
|
- pattern: "class\\s+\\w+State\\s+implements\\s+\\w+State"
|
|
weight: 0.15
|
|
description: "Concrete state classes"
|
|
|
|
confidence_threshold: 0.70
|
|
minimum_signals: 2
|
|
|
|
strategy:
|
|
naming_conventions:
|
|
- "*Strategy.ts"
|
|
- "*Policy.ts"
|
|
- "*Algorithm.ts"
|
|
|
|
primary_signals:
|
|
- pattern: "interface\\s+\\w+Strategy"
|
|
weight: 0.35
|
|
description: "Strategy interface"
|
|
|
|
- pattern: "private\\s+strategy:\\s*\\w+Strategy"
|
|
weight: 0.30
|
|
description: "Context holds strategy"
|
|
|
|
- pattern: "setStrategy\\s*\\([^)]*\\):"
|
|
weight: 0.25
|
|
description: "Method to set strategy"
|
|
|
|
secondary_signals:
|
|
- pattern: "this\\.strategy\\.execute\\("
|
|
weight: 0.15
|
|
description: "Delegates to strategy"
|
|
|
|
- pattern: "class\\s+\\w+Strategy\\s+implements\\s+\\w+Strategy"
|
|
weight: 0.15
|
|
description: "Concrete strategies"
|
|
|
|
confidence_threshold: 0.70
|
|
minimum_signals: 2
|
|
|
|
template-method:
|
|
naming_conventions:
|
|
- "*Template.ts"
|
|
- "*Abstract*.ts"
|
|
|
|
primary_signals:
|
|
- pattern: "abstract\\s+class"
|
|
weight: 0.30
|
|
description: "Abstract class with template"
|
|
|
|
- pattern: "abstract\\s+\\w+\\s*\\(\\):"
|
|
weight: 0.30
|
|
description: "Abstract primitive operations"
|
|
|
|
- pattern: "protected\\s+\\w+\\s*\\(\\):"
|
|
weight: 0.20
|
|
description: "Hook methods"
|
|
|
|
secondary_signals:
|
|
- pattern: "this\\.\\w+\\(\\);[^}]*this\\.\\w+\\(\\);"
|
|
weight: 0.15
|
|
description: "Template calls primitive operations"
|
|
|
|
- pattern: "final\\s+|\\btemplate\\b"
|
|
weight: 0.10
|
|
description: "Template method should be final (not overridden)"
|
|
|
|
confidence_threshold: 0.65
|
|
minimum_signals: 2
|
|
|
|
visitor:
|
|
naming_conventions:
|
|
- "*Visitor.ts"
|
|
|
|
primary_signals:
|
|
- pattern: "interface\\s+\\w+Visitor\\s*\\{[^}]*visit\\w+"
|
|
weight: 0.35
|
|
description: "Visitor interface with visit methods"
|
|
|
|
- pattern: "visit\\w+\\s*\\([^)]*:\\s*\\w+\\)"
|
|
weight: 0.30
|
|
description: "Visit methods for each element type"
|
|
|
|
- pattern: "accept\\s*\\([^)]*visitor[^)]*\\)"
|
|
weight: 0.30
|
|
description: "Elements accept visitor"
|
|
|
|
secondary_signals:
|
|
- pattern: "visitor\\.visit\\w+\\(this\\)"
|
|
weight: 0.15
|
|
description: "Double dispatch pattern"
|
|
|
|
confidence_threshold: 0.70
|
|
minimum_signals: 2
|
|
|
|
interpreter:
|
|
naming_conventions:
|
|
- "*Interpreter.ts"
|
|
- "*Expression.ts"
|
|
- "*Parser.ts"
|
|
|
|
primary_signals:
|
|
- pattern: "interface\\s+\\w+Expression"
|
|
weight: 0.30
|
|
description: "Expression interface"
|
|
|
|
- pattern: "interpret\\s*\\([^)]*context[^)]*\\)"
|
|
weight: 0.35
|
|
description: "Interpret method with context"
|
|
|
|
- pattern: "abstract\\s+class\\s+\\w+Expression"
|
|
weight: 0.25
|
|
description: "Abstract expression"
|
|
|
|
secondary_signals:
|
|
- pattern: "class\\s+Terminal\\w+|class\\s+NonTerminal\\w+"
|
|
weight: 0.15
|
|
description: "Terminal and non-terminal expressions"
|
|
|
|
- pattern: "parse\\s*\\("
|
|
weight: 0.10
|
|
description: "Parser for grammar"
|
|
|
|
confidence_threshold: 0.60
|
|
minimum_signals: 2
|
|
|
|
# Confidence Calculation
|
|
confidence_calculation:
|
|
formula: "sum(matched_signal_weights) / sum(all_possible_weights)"
|
|
adjustments:
|
|
- "If pattern name matches naming convention: +0.15"
|
|
- "If stack has native equivalent and not used: -0.20"
|
|
- "If anti-pattern detected: -0.30"
|
|
- "If typescript-specific signals present: +0.10"
|
|
|
|
# Output Format for Detection Results
|
|
detection_output:
|
|
file: "path/to/file.ts"
|
|
pattern: "singleton"
|
|
lines: "5-28"
|
|
confidence: 0.85
|
|
matched_signals:
|
|
- signal: "private constructor"
|
|
weight: 0.4
|
|
- signal: "static getInstance"
|
|
weight: 0.35
|
|
stack_context:
|
|
native_alternative: "Context API"
|
|
recommendation: "Consider using React Context for better testability"
|