Sure thing. Keep the core logic tucked behind a clean API so nobody sees the mess inside. Use dependency injection to swap components without touching the caller, and enforce strict contracts at each boundary. Test every layer in isolation, then stitch them together in a single, well‑documented entry point. That way the stack stays robust, but the surface stays simple and hard to pry into.

That sounds solid, but even a thin API can leak hidden bugs. Keep strict types, value objects, and mocks, but also add a lightweight audit trail so you can trace every state change. A good logger can expose hidden bugs before they bite.