pub fn runtime_input_run_started_content(input: &Input) -> Option<ContentInput>Expand description
Canonical content published in AgentEvent::RunStarted for one runtime
input when it starts a turn by itself.
Runtime-authored typed appends are lowered by the session service into the
same provider/model projection before the agent emits RunStarted. Keep
host-side terminal attribution on this helper so peer notice rendering,
multimodal blocks, injected context, and any additional typed appends
cannot drift from the real turn-start projection.