Defense-in-Depth Validation

关于

The Defense-in-Depth skill guides Claude in applying robust defensive programming principles to prevent bugs caused by invalid data. Instead of relying on a single check that could be bypassed by refactoring or mocks, this skill implements a four-layer protection strategy: Entry Point Validation, Business Logic Validation, Environment Guards, and Debug Instrumentation. It is particularly useful for hardening complex systems where data flows through multiple modules, ensuring that invalid states are caught immediately at the earliest possible point of failure.

主要功能

• Standardized debug instrumentation for enhanced forensic logging
• Automated data flow tracing to identify origin-to-sink vulnerabilities
• Structural bug prevention patterns that persist through refactoring
• Multi-layered validation mapping (Entry, Business, Environment, Debug)
• Context-aware environment guards to prevent dangerous operations in tests
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使用场景

• Hardening critical APIs against malformed or malicious input data
• Preventing accidental file system or git operations in non-target environments
• Securing complex business logic where validation bypasses could cause data corruption