[codex] Add context-preserving invoke stream#21
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💡 Codex Review
tinyagents/src/harness/agent_loop/stream.rs
Line 136 in 285dfe7
When callers pass a RunContext that was built with a long-lived/shared EventSink via with_events, this one-shot channel listener is appended to that sink permanently; EventSink::subscribe stores listeners in its internal Vec and there is no unsubscribe path. After the returned stream completes or is dropped, the receiver is gone but the sender remains in the shared sink, so repeated invoke_stream_in_context runs leak listeners and make every later emit clone/send to dead channels.
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Reviewed commit: a788b85500
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| // clone, so their lifecycle events reach this stream too. | ||
| ctx.events.subscribe(Arc::new(ChannelListener { tx })); | ||
| let listener: Arc<dyn EventListener> = Arc::new(ChannelListener { tx }); | ||
| ctx.events.subscribe(listener.clone()); |
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Avoid starving runs on shared event sinks
When ctx.events is a long-lived/shared sink, this subscribes the stream listener before this run future has been polled. The unfold below uses a biased select that drains rx.recv() before polling run_fut, so events emitted by another active run or host component on the same sink can keep this stream yielding unrelated records and prevent this run from starting or completing. Consider isolating/filtering the listener to this run or ensuring the run future is polled even while the shared sink is busy.
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Summary
Adds
AgentHarness::invoke_stream_in_context, a caller-consumable streaming entry point that preserves a caller-suppliedRunContext.invoke_streamstill constructs a fresh context for the simple case, but now delegates to the context-preserving method. This lets host integrations attach cancellation, events, stores, workspace metadata, or steering before driving the stream.Validation
cargo fmt --checktimeout 180s cargo clippy --all-targets -- -D warningstimeout 120s cargo test invoke_stream_in_context_preserves_caller_contextFull CI is left to GitHub runners.