DEVLOG #43 - I built one failure where I already knew the cause

SL-LLM-R’s repair search was missing many fixes that I expected it to find, but I did not know why. I built one small synthetic failure where the component reading the source signal gets the wrong input, so I can reproduce that miss on purpose. At least one failure now has a known cause, which I can compare with the unexplained failures without assuming they are all the same problem.