onion

Onion's philosophy ensures only required loaders are imported, keeping applications lightweight and focused, as emphasized in the Goals section to avoid unnecessary bloat.

The layered system allows combining multiple sources like files and environment variables with clear override rules, enabling environment-specific settings through priority-based configuration.

Supports dynamic configuration updates via file and etcd watchers, allowing changes without application restarts, which is crucial for cloud-native apps and microservices.

Provides encrypted configuration storage using secconf with PGP and base64 encoding, with a CLI tool (onioncli) for key management, enhancing security for sensitive data.