${walk}:${index} — stable for the life of the walk.
Position within the walk — the agent's review order.
OptionallabelSheet-qualified address, current.
The sheet the range is on. An annotation is on exactly one sheet.
OptionalsourceWho added it (an agent session); the host's tag, carried through.
stale means the range can no longer be placed (its cells or its sheet were deleted). A stale
annotation is listed, so the user still sees what was said, but is not drawn and is skipped by
the navigator. A dismissed annotation is removed, not marked.
The call that produced it; ordering across walks.
One annotated range.
Remarks
Transient view state: never serialized, never on the undo stack.
rangeis kept current as rows and columns move under it;statusturnsstaleonce its cells (or its sheet) are gone, and back toopenif an undo brings them back. Every change replaces the object, so views compare by identity.