Derived caches belong to the admitted compiler index. The unchecked selectors
below must consume participantAdmit's result; arbitrary hand-built indexes
are not certificates. A worker retains only its projected roles/edges, not
this entire index. Lookup follows one structural path, never a rank list.
61constructor ParticipantJoinIndexThe compiler supplied declaration spans and resolved links from this source snapshot. This page does not assert that this file belongs to a checked closure.