analyze-coupling-cohesion
Coupling & Cohesion Analyzer
Overview
This skill analyzes PHP codebases for coupling and cohesion metrics, helping identify architectural issues like unstable dependencies, low cohesion classes, and tightly coupled modules.
Metrics Reference
| Metric | Formula | Target | Description |
|---|---|---|---|
| Ca (Afferent) | Incoming deps | - | Classes depending ON this |
| Ce (Efferent) | Outgoing deps | < 10 | Classes this DEPENDS on |
| Instability (I) | Ce / (Ca + Ce) | 0.0-1.0 | 0=stable, 1=unstable |
| Abstractness (A) | Abstract / Total | 0.0-1.0 | Ratio of interfaces |
| Distance (D) | |A + I - 1| | < 0.3 | Distance from main sequence |
| LCOM | Methods not sharing fields | < 0.5 | Lack of cohesion |
Detection Patterns
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