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Sarj Sarj Sarj Standards

require-port-for-service

Advise when an exported service with injected collaborators has public methods not covered by its declared ports.

requireInterface Rule source Tests Catalog JSON

Why

A declared port keeps consumers coupled to the service capability instead of its concrete implementation.

Fix

Declare and implement an interface covering the service's public methods.

Examples

Before — flagged Do not expose only the concrete service
src/service.ts
export class RequestHandler {
  constructor(private readonly store: TaskStore) {}
  handle(): void {
    this.store.handle();
  }
}
After — preferred Implement the service port
src/service.ts
interface Handler {
  handle(): void;
}
export class RequestHandler implements Handler {
  constructor(private readonly store: TaskStore) {}
  handle(): void {
    this.store.handle();
  }
}

Formerly: require-interface-for-injected-service