TempController(Smith).__init__ no longer takes model_params/theta_amb - set_model_plant_params() and the existing set_ambient_temperature() must be called instead (mirrors components/plant/pot.py's own Pot constructor refactor). temp_controller.py's now-pointless model_params/theta_amb constructor placeholders (kept only for "compatibility" with Smith) are dropped too. Both TempController variants now raise a clear RuntimeError from process() itself if set_params() wasn't called, instead of letting it surface deep inside Pid.process() as an opaque "'NoneType' object is not subscriptable". Smith additionally checks its internal models via Pot.is_configured() (new) and raises if set_model_plant_params()/set_ambient_temperature() weren't called either. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DkkuG48uHFCGKe6dPSERFk