Go CLI Application Architecture

Organize around dependency direction and testable behavior, not a copied folder template. Keep CLI framework code as an adapter around application services.

Core Workflow

1. Identify commands, domain actions, external effects, and shared policies.
2. Separate parsing/rendering from application orchestration and adapters.
3. Define interfaces at the consumer that needs substitution.
4. Construct dependencies once in a composition root and pass them explicitly.
5. Keep configuration immutable after validation; give mutable state a dedicated store.
6. Record ownership and cleanup for every acquired resource and background task.
7. Test inward from pure logic to adapters and one assembled executable path.

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