소개
This skill provides a robust framework for implementing Defense-in-Depth validation strategies within codebases. It guides Claude to apply checks across four distinct layers—entry point validation, business logic, environment guards, and debug instrumentation—ensuring that invalid data is caught at the earliest possible moment and cannot bypass safeguards through refactoring, mocks, or alternative code paths. This approach is particularly useful for mission-critical systems where data integrity is paramount and where simple single-point checks are insufficient to prevent complex regressions or accidental data loss.
