Agent skill

NestJS Configuration

Environment variables validation and ConfigModule setup.

View SKILL.md on GitHub Repository
Stars 163
Forks 31

Install this agent skill to your Project

npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/configuration

Metadata

Additional technical details for this skill

labels
nestjs config env
triggers 
{
    "files": [
        ".env",
        "app.module.ts",
        "**/config.ts"
    ],
    "keywords": [
        "ConfigModule",
        "Joi",
        "env"
    ]
}

SKILL.md

NestJS Configuration Standards

Priority: P1 (OPERATIONAL)

Environment configuration and validation patterns for NestJS applications.

Setup

  1. Library: Use @nestjs/config.
  2. Initialization: Import ConfigModule.forRoot({ isGlobal: true }) in AppModule.

Validation

  • Mandatory: Validate environment variables at startup.
  • Tool: Use joi or a custom validation class.
  • Effect: The app must crash immediately if a required env var (e.g., DB_URL) is missing.
typescript
// app.module.ts
ConfigModule.forRoot({
  validationSchema: Joi.object({
    NODE_ENV: Joi.string()
      .valid('development', 'production')
      .default('development'),
    PORT: Joi.number().default(3000),
    DATABASE_URL: Joi.string().required(),
  }),
});

Usage

  • Injection: Inject ConfigService to access values.
  • Typing: Avoid magic strings. Use a type-safe getter helper or a dedicated configuration object/interface.
  • Secrets: Never commit .env files. Add .env* to .gitignore.

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