system-design

A deep module in software architecture features a simple interface that hides substantial implementation complexity, providing robust information hiding while minimizing external coupling and preventing leakage of internal knowledge.

Reduce software complexity by applying a design twice mindset to compare multiple approaches, enforcing simple extensible interfaces, and establishing clear responsibility boundaries to ensure long-term maintainability.

Yes, you can apply these architecture design principles to CLIs, libraries, and APIs to minimize future maintenance by hiding implementation details and defining clear boundaries.

The best way to handle error boundaries in software design is to aim to redefine errors out of existence where possible, preventing internal knowledge leakage and minimizing coupling across modules.

Information hiding matters for long-term maintainability because it prevents leakage of internal knowledge, reduces system complexity, and minimizes coupling between deep modules with clear responsibility boundaries.

You should reconsider deep modules when early design comparison shows that simple interfaces cannot adequately hide implementation details without leaking internal knowledge or compromising clear responsibility boundaries.