The indexer consumes the seat mesh-wants' wanted (on wanted.<node>.<module>, kept last per subject: the seat's definition gains
the two tokens and the keep) and the node-engine seat's running, each read whole at its start and followed; it keeps in the
old state section named (max-mib 4) one key per fingerprint with its set of <node>.<module>, written by compare-and-set. An
entry object is removed only when no kept revision lists it and its set is empty, and not before both streams were read and the
sets reconciled; its entry-index key goes with it. indexer_entries reads the set, indexer_named_drop removes one member by
hand (class act, said in the hand-act log first).
Builds: design 47 G §675, §695, A-61
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
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