Struct ResourceTraceAppender 

pub struct ResourceTraceAppender { /* private fields */ }

A second, independent O_APPEND handle to the session’s trace.jsonl, used by the resource plane, by the peer plane’s listener, and by the peer-handoff tools in the agent loop.

[TraceWriter] is &mut-owned by the agent loop and cannot be shared, and the motivating case for a resource-plane event — a gateway reading a finished-but-alive capsule — happens after session_end has already been written. So the plane gets its own handle rather than a borrow of the loop’s, and every event is written at the moment of the request rather than deferred to a task boundary: a denied read that only surfaced at the next task end would be a record of the wrong thing at the wrong time.

Interleaving is safe because both writers emit exactly one complete line per write_all and flush it, and O_APPEND makes each such write atomic against the other’s.

Implementations

impl ResourceTraceAppender

pub async fn open( workdir: &Path, session_id: String, session_event_id: String, ) -> Result<Self>