That’s familiar. Specs still in review. Backend “almost ready.” Another standup, another delay. Time leaks while teams wait. You don’t wait. You spin endpoints out of air. No code. No setup. No permission. From spec to mock in the time it takes to reload this page. State matters. What happened before comes with you. Login stays logged in. Flows remember. Context doesn’t reset. You don’t either. Need data? Not placeholders. Real shapes. Real variance. Generated on demand, like it should have been all along. This page is missing. Fine. What’s missing in most teams is speed. If the API isn’t built, or the promises don’t match reality, you don’t stop. You mock. You move. You ship.