I opened the module. Four thousand lines, a dozen files. Started at the entry point. The first function called into a subsystem I didn't recognize, which wrapped another subsystem, which used a helper defined across the file from where it was called. I opened three tabs. The helpers had helpers. Nothing I read told me what the module was for at a level above the mechanics of what it did on line 412. I went back to the entry point. I re-read it. I still didn't know what I was looking at. My diagram had twenty-odd boxes and none of them connected in a way that explained anything.
