Live joints (§28).
The adapter's own reportsJointReactions declaration. false means §28
break thresholds cannot be enforced on this adapter (both Rapier adapters,
as of Rapier 0.19.3) — worth surfacing in an overlay, since it explains why
a breakable joint was refused.
The joint half of §113's solver statistics — everything the joint seam exposes without asking for a reaction it may not report.