Module config 

High-level configuration conventions and layering. High-level configuration conventions.

This module describes a minimal, explicit layering model suitable for many services: defaults → file → environment.

Contract

• Sources are applied from low → high precedence.
• On key conflict, the later (higher-precedence) source wins.
• Validation is out of scope; callers should validate merged configuration before use.

Structs

AppConfig

Minimal application configuration placeholder.

ConfigStack

A minimal, explicit config layering plan.

Enums

ConfigSource

Where configuration should be loaded from.