High Coupling

ID: high_coupling | Severity: Medium (default)

High coupling occurs when a module depends on too many other modules (high Fan-out).

Why this is a smell

• Rigidity: A change in any of the dependencies might require a change in this module.
• Fragility: The module is more likely to break when any of its dependencies change.
• Hard to Test: Requires many mocks to isolate for unit testing.

How to fix

1. Extract Responsibilities: If a module has too many dependencies, it's likely doing too much.
2. Use Abstractions: Depend on an interface or a facade instead of many concrete implementations.

Configuration

rules:
  high_coupling:
    severity: medium
    max_cbo: 20

ESLint Rule

This detector is available as an ESLint rule for real-time feedback in your editor.

// eslint.config.js
export default [
  {
    rules: {
      '@archlinter/no-high-coupling': 'warn',
    },
  },
];

See ESLint Integration for setup instructions.