Low Cohesion (LCOM4)

ID: lcom | Severity: Medium (default)

Cohesion measures how closely related the methods and fields of a class are. archlint uses the LCOM4 (Lack of Cohesion of Methods) metric.

Why this is a smell

• Violation of SRP: The class is likely doing two or more unrelated things.
• Fragility: Changing one part of the class might affect unrelated parts.
• Hard to Reuse: You can't use one part of the class without pulling in unrelated logic.

How to fix

1. Extract Class: Split the class into two or more smaller classes, each with a single responsibility.
2. Move Method: Move methods that don't use the class state to a more appropriate location (e.g., a utility module).

Configuration

rules:
  lcom:
    severity: medium
    max_lcom: 4
    min_methods: 3