Not-Invented-Here Syndrome

You sat down to add one endpoint and you are now upgrading a build tool. Every step was a correct call. Here is why a chain of good engineering decisions ends miles from the goal, and how to put an edge on it before it takes the day.

The queue, the cache, the multi-region plan — all defensible, all built for load that has never arrived. Why scaling work feels like responsibility from the inside, what it is quietly protecting you from, and how to tell the two apart.