소개
The Defense-in-Depth Validation skill equips Claude with a robust framework for preventing systemic bugs through redundant, layered checks. Instead of relying on a single validation point that could be bypassed by mocks, refactoring, or alternative code paths, this skill guides the implementation of checks at four critical stages: API entry points, business logic, environment-specific guards, and debug instrumentation. It is particularly useful when managing critical operations—such as file system changes, database mutations, or external service calls—where invalid data could lead to catastrophic failures or difficult-to-trace regressions.
