A shipped SolidWorks agent skill called interference-check API methods that do not exist (InterferenceDetection, GetInterference(index), GetComponents) and called Done() before computing, so its core validation step could never complete on a real machine. The check silently never ran.
From the 2026-10-07 pain-radar digest (finding 4): single PR, Chinese-language with gloss-verified description, so confidence is Low. The repair still routes design-intent judgment to a human. Cost model assumes interference checks redone manually after discovering the agent's check never executed.