chore: Skip events without content when finding the last transfer agent.

[hanmingalbertyang]

Events without content, such as those from callbacks with state_deltas, do not represent a transfer to an agent that should continue the conversation.

[gemini-code-assist]

Summary of Changes

Hello @hanmingalbertyang, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the logic for identifying the last agent responsible for continuing a conversation. It addresses a potential issue where events without substantive content could lead to incorrect agent handoffs. By explicitly filtering out these content-less events, the system now more reliably determines which agent should resume interaction, ensuring a smoother and more accurate conversational flow.

Highlights

• Event Filtering: Implemented a filter to skip events that do not contain content when determining the last transfer agent. This ensures that only meaningful conversational events are considered.
• Agent Handoff Logic: Improved the accuracy of identifying the correct agent to resume a conversation by excluding non-conversational events, such as those originating from callbacks with state_deltas.

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[gemini-code-assist]

Code Review

This pull request correctly filters out events without content when searching for the last agent to transfer to. By using a generator expression to iterate only over events where e.content is present, the change improves clarity and efficiency, ensuring that only relevant conversational events are considered. The logic is sound and aligns with the goal of ignoring state-only events during agent resumption.

[hanmingalbertyang]

this was not the correct fix for the issue