eslint-plugin-modularity

⭐ If this plugin caught a real bug for you, star the repo — it's the signal that keeps these rules maintained.

Description

This plugin provides Modularity rules — module boundaries, circular dependency detection, and layered architecture.

• Why — a linter nobody reads protects nothing. We would rather miss a finding than spend your attention on one that was never real.
• How — evidence, not names. A rule fires on what the code does, resolved through the AST and ESLint's own scope analysis.
• What — every finding carries its fix, in prose for a human and as structured JSON for an agent. Security rules add a CWE mapping and, where assigned, a CVSS score.

That trade costs recall, and we measure it: methodology · results · a false positive is a bug.

Getting Started

• To check out the guide, visit eslint.interlace.tools. 📚

npm install eslint-plugin-modularity --save-dev

⚙️ Configuration Presets

🏢 Usage Example

// eslint.config.js
import modularity from 'eslint-plugin-modularity';

export default [
  modularity.configs.recommended,

  // Apply strict DDD enforcement to domain layer
  {
    files: ['src/domain/**/*.ts'],
    ...modularity.configs.strict,
  },
];

Why These Rules?

ddd-anemic-domain-model

Detects domain entities that are just data containers without behavior — a common anti-pattern.

// ❌ Bad: Anemic model, no behavior
class Order {
  id: string;
  items: OrderItem[];
  status: OrderStatus;
}

// ✅ Good: Rich domain model with behavior
class Order {
  id: string;
  private items: OrderItem[];
  private status: OrderStatus;

  addItem(item: OrderItem): void {
    /* ... */
  }
  submit(): void {
    /* ... */
  }
  cancel(reason: string): void {
    /* ... */
  }
}

ddd-value-object-immutability

Value objects should be immutable. This rule catches mutable value objects.

// ❌ Bad: Mutable value object
class Money {
  amount: number; // Can be mutated!
}

// ✅ Good: Immutable value object
class Money {
  readonly amount: number;
  readonly currency: string;

  add(other: Money): Money {
    return new Money(this.amount + other.amount, this.currency);
  }
}

no-external-api-calls-in-utils

Utility modules should be pure functions without side effects like API calls.

// ❌ Bad: Utils with external dependencies
// src/utils/formatters.ts
import axios from 'axios';

export async function fetchAndFormat(id: string) {
  const data = await axios.get(`/api/${id}`); // External API call!
  return format(data);
}

// ✅ Good: Pure utility function
export function format(data: Data): FormattedData {
  return {
    /* pure transformation */
  };
}

📦 Compatibility

See the ESLint Version Support Policy — current ecosystem share data, the 20% gate, and the forward-looking exception that covers v10.

Rules

Legend

🔗 Related ESLint Plugins

Part of the Interlace ESLint ecosystem — AI-native rules with LLM-optimized error messages:

Security

Plugin	Downloads	Description
eslint-plugin-anthropic-security		Anthropic SDK security.
eslint-plugin-browser-security		XSS, DOM security.
eslint-plugin-drizzle-security		Drizzle security.
eslint-plugin-express-security		Express middleware hardening.
eslint-plugin-gemini-security		Google Gemini SDK security.
eslint-plugin-jwt-security		Token security.
eslint-plugin-knex-security		Knex security.
eslint-plugin-lambda-security		AWS Lambda hardening.
eslint-plugin-mcp-sdk-security		MCP SDK security.
eslint-plugin-mongodb-security		MongoDB injection.
eslint-plugin-mysql-security		MySQL security.
eslint-plugin-nestjs-security		NestJS framework hardening.
eslint-plugin-node-security		Server-side patterns.
eslint-plugin-openai-security		OpenAI SDK security.
eslint-plugin-postgresql-security		PostgreSQL security.
eslint-plugin-prisma-security		Prisma security.
eslint-plugin-secure-coding		Injection prevention.
eslint-plugin-sequelize-security		Sequelize ORM security.
eslint-plugin-sqlite-security		SQLite security.
eslint-plugin-supabase-security		Supabase security.
eslint-plugin-typeorm-security		TypeORM security.
eslint-plugin-vercel-ai-security		AI SDK security.

Code quality

Plugin	Downloads	Description
eslint-plugin-conventions		Team-specific habits and styles.
eslint-plugin-import-next		Fast cycle + import-graph analysis.
eslint-plugin-maintainability		Cognitive load and clean-code patterns.
eslint-plugin-modernization		ESNext migration + syntax evolution.
eslint-plugin-operability		Production readiness and resource health.
eslint-plugin-react-a11y		React accessibility / WCAG.
eslint-plugin-react-features		React best practices and optimization.
eslint-plugin-reliability		Runtime stability and error safety.

⭐ Support & follow

If this plugin caught a real bug for you, star the repo — stars are the signal that keeps the Interlace ESLint ecosystem maintained — and follow the writeups on Dev.to for the benchmarks and security research behind these rules.

📄 License

MIT © Ofri Peretz