Pin a memory as a standing rule

Make a memory a standing rule. Every run in its scope carries up to 10 pinned memories, protected rules first and then newest unprotected pins, whatever the run asks. Protected rules count against this limit. A pin protects the memory from Curator decay, prune, and consolidation. A personal memory stands only in a run that answers its owner in the owner's own chat-platform direct message. A meeting memory keeps that protection but reaches a run only through ordinary recall.