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fix(live): transfer to the target agent regardless of function response order - #6608
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…se order In Live mode, `BaseLlmFlow.run_live()` gated agent transfer on whether the `transfer_to_agent` function response was `event.content.parts[0]`. When the model issues `transfer_to_agent` alongside other function calls, the responses are merged into a single event in call order, so a non-transfer tool's response can land first and the transfer is silently ignored: both tools run, the merged event carries the correct `actions.transfer_to_agent`, but the target agent never starts and the user keeps talking to the parent. The positional check was originally only a connection-teardown heuristic, while the transfer itself was correctly gated on `actions.transfer_to_agent` in `_postprocess_live`. When the transfer moved into `run_live` to stop the parent and child from both processing the same function response, it was nested under that heuristic and inherited its assumption that `transfer_to_agent` is the only call in the turn. Gate the transfer on `event.actions.transfer_to_agent`, which restores the original predicate and matches `run_async`. Besides the ordering case, this fixes two related Live-only gaps: - A tool that requests a transfer by setting `actions.transfer_to_agent` directly, rather than calling `transfer_to_agent`, now transfers in Live as it already does in `run_async`. - A `transfer_to_agent` response whose action was suppressed, for example by a `before_tool_callback` overriding the transfer tool, no longer closes the parent connection. Previously the connection was closed and `send_task` cancelled with no child agent taking over, stranding the Live session. Behavior is unchanged for a lone `transfer_to_agent` call and for parallel calls that do not transfer. The sibling `task_completed` gate still keys off `parts[0]` and has the same order dependency; it is left for a follow-up.
wuliang229
marked this pull request as ready for review
August 6, 2026 02:01
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Ports the fix for #6541 to the
v1branch.