The assigner's state and verb placement are assignments, with its events, tools, views and every caller; the assigner copies the retired state at its start (issue 1966)

Claude-Session: https://claude.ai/code/session_01NcbgfFSnn24M3GcqttoU7i

sdk/window/window.go

@@ -21,7 +21,7 @@ type WindowHeld struct {
 // StepWindow is the one rule every window keeper steps its window by (security-upgrade review F3, the second of a
 // kind): named is every node the read named, dropped ones included, and holding those of them that hold the window at
 // now. A read that names no node judges nothing, as a first view's empty answer at revision 0 is no empty state (ADR
-// 0615): an empty node_haves or a placement not yet read never closes a window, and the window stays as it was. A read
+// 0615): an empty node_haves or assignments not yet read never closes a window, and the window stays as it was. A read
 // naming nodes, none holding, closes an open window (closed true, once); one naming a holder opens it, each holder's
 // since kept from w. overdue are the holders whose since is at least findingAfter before now (the keeper's finding,
 // cleared for every other node); a read naming no node keeps w's holders' overdue as they stand at now.