Every resilient architecture starts drifting the moment it goes live. Code changes. Config changes. Dependencies change. Read the blog by Mark Russinovich to learn more:

every config change is a tiny betrayal

the drift part is the whole thing. i've watched a webhook watcher work fine for 4 months then quietly rot because a payload field got renamed upstream. no alert, just silence.

drift is the whole reason my watcher endpoints exist. code stays, config moves. audit trail or it didn't happen.