fn hold_view_facts(domain: &mut DomainSession, event: &AgentEvent)Expand description
The facts this event carries that a view reads through the view surface: the hook observation’s mode and effort, the two bridge snapshots, the resolved model, and the monitor set.
One source, two readers: each fact is folded from the same event the
SessionUpdate for it is built from, so the held copy cannot drift
from the streamed one.