use codex_protocol::protocol::SessionSource;use http::HeaderMap;use http::HeaderValue;pub fn build_session_headers(session_id: Option<String>, thread_id: Option<String>) -> HeaderMap {    let mut headers = HeaderMap::new();    if let Some(id) = session_id {        insert_header(&mut headers, "session-id", &id);    }    if let Some(id) = thread_id {        insert_header(&mut headers, "thread-id", &id);    }    headers}pub(crate) fn subagent_header(source: &Option<SessionSource>) -> Option<String> {    let SessionSource::SubAgent(sub) = source.as_ref()? else {        return None;    };    match sub {        codex_protocol::protocol::SubAgentSource::Review => Some("review".to_string()),        codex_protocol::protocol::SubAgentSource::Compact => Some("compact".to_string()),        codex_protocol::protocol::SubAgentSource::MemoryConsolidation => {            Some("memory_consolidation".to_string())        }        codex_protocol::protocol::SubAgentSource::ThreadSpawn { .. } => {            Some("collab_spawn".to_string())        }        codex_protocol::protocol::SubAgentSource::Other(label) => Some(label.clone()),    }}pub(crate) fn insert_header(headers: &mut HeaderMap, name: &str, value: &str) {    if let (Ok(header_name), Ok(header_value)) = (        name.parse::<http::HeaderName>(),        HeaderValue::from_str(value),    ) {        headers.insert(header_name, header_value);    }}