Fail-Closed Governance: Why Your AI Should Default to No

The permissive default problem

Most AI systems operate on an allow-by-default model. If there's no explicit rule saying "don't do this," the AI proceeds. In enterprise operations — where actions affect customers, finances, and compliance — this is dangerous.

How fail-closed works

Aegis agents operate on a deny-by-default model. Every action requires explicit authorization through a policy. If the policy doesn't exist, or if the authorization context is incomplete, execution halts and the system escalates to a human.

The result

You never get surprised by an AI agent doing something unexpected. The worst case is a paused workflow that needs human input — not an unauthorized action that needs damage control.