Configuration Management

Handles the full stack of config management from environment variables to feature flags and secret handling. You'll reach for this when setting up multi-environment deployments, implementing 12-factor app principles, or migrating credentials out of your codebase. Covers the practical stuff like config hierarchies, validation on startup, and integration with secret managers. The reference guides walk through everything from basic .env files to dynamic remote configuration. The best practices section is solid on the security fundamentals, like never committing secrets and using proper secret managers instead of rolling your own. Good coverage of the circular dependency trap where people try storing config in databases.

skills.sh installs: 448
GitHub stars: 379
last updated: Aug 21, 2026

View on GitHub

Install

$ npx -y skills add aj-geddes/useful-ai-prompts --skill configuration-management --agent claude-code

Installs into .claude/skills of the current project.

Files

Overview

Comprehensive guide to managing application configuration across environments, including environment variables, configuration files, secrets, feature flags, and following 12-factor app methodology.

When to Use

Setting up configuration for different environments
Managing secrets and credentials
Implementing feature flags
Creating configuration hierarchies
Following 12-factor app principles
Migrating configuration to cloud services
Implementing dynamic configuration
Managing multi-tenant configurations

Quick Start

Minimal working example:

# .env.development
NODE_ENV=development
PORT=3000
DATABASE_URL=postgresql://localhost:5432/myapp_dev
REDIS_URL=redis://localhost:6379
LOG_LEVEL=debug
API_KEY=dev-api-key-12345

# .env.production
NODE_ENV=production
PORT=8080
DATABASE_URL=${DATABASE_URL}  # From environment
REDIS_URL=${REDIS_URL}
LOG_LEVEL=info
API_KEY=${API_KEY}  # From secret manager

SKILL.md on GitHub