Use when designing verification strategy so independent gates cover requirements, implementation, security, validation, and judgment without claiming perfect certainty.
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---
name: defense-in-depth
description: Use when designing verification strategy so independent gates cover requirements, implementation, security, validation, and judgment without claiming perfect certainty.
---
# Defense in Depth
Design independent, diverse checks so a defect must survive multiple uncorrelated gates.
## Gate design
- Assign an owner.
- Define independence from the implementation author.
- State machine-checkable pass criteria.
- Set loop limits.
- Record evidence and residual risk.
Avoid saying a workflow is 100% safe; report coverage and remaining uncertainty.
