Placing a symbol through the agent tools did not copy the library Sim fields to the instance, and KiCad simulator reads only the instance. A placed diode exported as D1 __D1 and the simulation step refused it as unmodelled. Fixed in every placement path, with a negative control that strips the fields and gets refused again.
From the Grok pain-radar digests, Oct 31-Nov 1 2026 (Oct 31 9:41 PM ET through Nov 1 7:41 AM ET digests plus the Haitch overnight edition). Verified live 2026-11-01: issue/PR read; title and state confirmed.