# Laravel:interfaces And Di

> Use interfaces and dependency injection to decouple code; bind implementations in the container

- Skill: `jpcaparas/laravel-interfaces-and-di` (Agent Skill)
- Install (CLI): `npx skillmds@latest add jpcaparas/laravel-interfaces-and-di`
- Raw SKILL.md: https://api.skillmd.com/api/skills/jpcaparas/laravel-interfaces-and-di/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: jpcaparas (https://skillmd.com/u/jpcaparas)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/jpcaparas/laravel-interfaces-and-di

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# Interfaces and Dependency Injection

Define narrow interfaces and inject them where needed. Bind concrete implementations in a service provider.

```php
interface Slugger { public function slug(string $s): string; }

final class AsciiSlugger implements Slugger {
  public function slug(string $s): string { /* ... */ }
}

$this->app->bind(Slugger::class, AsciiSlugger::class);
```

Benefits: easier testing (mock interfaces), clearer contracts, swap implementations without touching consumers.