Status: IN
Command and Memento form a state-capture pattern family: both are token objects passed around for later invocation, Command captures a request for undo/redo via history lists, and Memento captures iteration state for concurrent traversals — enabling temporal decoupling of action from execution.
Token objects enable temporal decoupling through captured state
Depends on (SL): command-memento-token-objects, command-undo-via-unexecute-and-history, gof-memento-iteration-two-benefits