#10871 reworded Lip's refusal on a face that is not a shelled rim to
"Lip needs the rim of a shelled body: ...", but the plastic rig case
cov-lip-on-a-face-without-an-opening-refused still looked for "pick the
rim face of a shelled body". The case now matches the new message, so the
kernel rig's plastic shard passes again on main.
Claude-Session: https://claude.ai/code/session_01SdcgEu4Lr3moCCisdZShKz
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>