[Quality Layer] Code Quality & Smell Detection

[gloomcheng]

Problem

No detection of:

• High cyclomatic complexity
• Code duplication (beyond basic patterns)
• Long methods/classes
• God objects

Developer Pain Points

• Code quality degrades over time
• No automated refactoring suggestions
• Manual code reviews catch issues late
• No visibility into technical debt

Proposed Solution

Code Quality Analyzer with:

1. Calculate complexity metrics (McCabe, Halstead)
2. AST-based duplication detection
3. Identify refactoring candidates
4. Suggest design patterns

Features

• Cyclomatic complexity calculation
• Code duplication detection (AST comparison)
• Long method detection (>50 lines)
• God object detection (>10 methods)
• Design pattern suggestions

MCP Tools

• quality-analyze: Analyze code quality
• quality-complexity: Calculate complexity
• quality-duplicates: Find duplicated code
• quality-refactor: Suggest refactorings

Priority

Medium

Effort Estimate

2 days

[gloomcheng]

Implemented code quality & smell detection service with 4 MCP tools:

• quality-analyze: Comprehensive quality analysis with smell detection
• quality-complexity: Calculate cyclomatic and cognitive complexity
• quality-duplicates: Find duplicated code blocks
• quality-refactor: Generate prioritized refactoring suggestions

Features:

• 20+ code smell types (long-method, god-object, high-complexity, etc.)
• Configurable quality thresholds
• Quality scoring (0-100) and grading (A-F)
• Code duplication detection with similarity scoring

Commit: 5869e5b