Through the Python API the pattern is valid and Up-to-date, but the Body's shape doesn't include it, and the next feature lands before it. GUI users are fine. Scripts and macros get bodies without the mirrored geometry, so exports and mass come out wrong.
From the Grok pain-radar digests, Nov 2 2026 (Nov 2 8:41 AM ET through Nov 2 10:41 PM ET digests plus the Haitch editions). Verified live 2026-11-03: issue/PR read; title and state confirmed.