A tool's callers list named modules ("node-tools", "mesh-healers"). A-295: an entry `seat:<seat>`
allows a module caller whose module holds that seat, as a holder function the part is given answers
it from what it last heard of the assigner's seat-holders view, so no call is made per check.
VerbCallers.AllowedWith and seatlist.RefusalWith/ToolsWith take the function; Allowed, Refusal and
Tools keep their form (no seat entry allows anyone without one); a seatlist.Part is given it by
Holders.
Builds: design 47 G A-210, A-295
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
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