Configuration Management

Load, validate, and manage application configuration across environments.

Configuration Hierarchy

Priority order (highest wins):

1. Command-line arguments
2. Environment variables
3. .env.local (git-ignored, per-developer)
4. .env.{environment} (e.g., .env.production)
5. .env (shared defaults)
6. Config file (config.yaml, settings.toml)
7. Application defaults

Python: Pydantic Settings