I spent all day with Claude doing tons of boiler plate code. This is stuff that's 95% brain dead simple parsing JSON with very well defined patterns. Basically all I was doing is telling it what I needed added, answering questions on the 5% stuff (nothing complex) and reviewing. Method by method, class by class.
I'm so damned mentally fried now. Feels just like if I had spent all day fighting with some multi-threading Apple framework bug and failing to fix it.