What should fail closed?
Practice this question- Permission, approval, and critical business-rule checks should block action when they cannot establish validity.
- For uncertain content or model availability, I use an appropriate clarification, template, search result, or human escalation rather than silently committing.
Adapted from 13_AI.MD · “29.14 Guardrails”. Code examples are study fragments. Difficulty and core labels are editorial estimates; version-specific behavior should be checked against your project.