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feat(a2a-nats): add minimal server message_stream handler #357

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Merged
yordis merged 3 commits into from
Jun 19, 2026
+433 −1
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feat(a2a-nats): add minimal server message_stream handler #357

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98a0a50
feat(a2a-nats): add minimal server message_stream handler
yordis Jun 19, 2026
618ac20
fix(a2a-nats): wrap message_stream bootstrap reply in SendMessageResp…
yordis Jun 19, 2026
46c9ce4
fix(a2a-nats): publish stream events under caller-supplied req id
yordis Jun 19, 2026
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9 changes: 9 additions & 0 deletions rsworkspace/crates/a2a-nats/src/server/handler.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -134,6 +134,15 @@ pub trait A2aExecutor: Send + Sync + 'static {
&self,
request: a2a::types::DeleteTaskPushNotificationConfigRequest,
) -> Result<(), A2aError>;

/// Bootstrap a streaming task. Returns the initial task envelope (used as the
/// JSON-RPC bootstrap reply) and a stream of [`a2a::event::StreamResponse`] items;
/// the dispatch handler publishes each item on the JetStream task-events subject
/// until the task reaches a terminal state.
async fn message_stream(
&self,
request: a2a::types::SendMessageRequest,
) -> Result<(a2a::types::Task, TaskEventStream), A2aError>;
}

#[cfg(test)]
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