Executives often treat decisions as permanent commits: once chosen, they calcify into long-running practices, budgets, and habits even when evidence shifts. The core insight: design every non-permanent decision with an expiry and a clear re-evaluation mechanism so you reduce regret, accelerate learning, and keep capacity available for new bets. This briefing presents the Decision Expiry Protocol: three compact moves—(1) Assign: classify decision types and attach a sunset (short, medium, long) with success/failure checkpoints; (2) Monitor: choose 2–3 signal metrics and simple AI checks that surface when a decision crosses its tolerance band; (3) Revert or Renew: automatic reversion rules, lightweight rollback playbooks, and how to document lessons. You’ll get concrete templates for setting expiries on pricing tests, vendor pilots, org experiments, and AI automations. Action: pick one active decision, give it a 30–90 day expiry, publish the re-eval rule, and subscribe. Stay agentic.