The code and the scheduled jobs don't disappear the day the engagement ends. Jobs keep firing on their existing schedule, integrations keep pulling and pushing data, and anything already queued keeps going out. What stops is the part nobody sees: the daily check that a job actually ran, the retry when a vendor's API returns something unexpected, the judgment call when a system hits a decision it isn't built to make alone. These systems are built to run unattended for long stretches, not to run unsupervised forever.
This is why we describe the work as building and running a system rather than handing over a finished tool and stepping back. We work this way in our own operation too: 110+ scheduled jobs running continuously across 40+ live integrations, 88 separate systems in production, output going out in seven languages. Keeping that many moving parts healthy takes daily attention, not a one-time setup. A system built for your business needs the same kind of attention. If nobody inherits it when we step away, the system doesn't stop working right away, it just stops being watched.
Ending things cleanly is straightforward if it's planned for: credentials, documentation, and a clear map of what each part does and depends on need to go to whoever takes over, your own team or another provider. Harder to hand off is the judgment built from watching the system run: which alerts matter, which failures are cosmetic, which ones need a person right now. If there's nobody lined up to take that on, and building that capability in-house isn't on the table either, stopping without a handover plan is usually where things quietly start to go wrong.