Preserve assistant phase for replayed messages#19832
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Preserve assistant phase for replayed messages#19832friel-openai wants to merge 1 commit intomainfrom
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ResponseInputItem::Message can contain assistant-authored history that is later converted into ResponseItem::Message. Preserve phase across that boundary instead of inferring phase from message content. InterAgentCommunication::to_response_input_item records inter-agent mailbox messages as commentary because they are assistant-authored in-between updates, not completed final answers. This follows the assistant phase guidance in https://developers.openai.com/api/docs/guides/deployment-checklist#set-up-the-assistant-phase-parameter. Co-authored-by: Codex <noreply@openai.com>
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Summary
This PR preserves
ResponseItem::Message.phasewhen a message is converted throughResponseInputItem::Message, and recordsInterAgentCommunication::to_response_input_item()asMessagePhase::Commentaryat the inter-agent message source.The prior fork-based PR included unrelated Bazel workflow edits. This PR intentionally contains only the response-phase change.
Context
The OpenAI API deployment checklist says follow-up requests should preserve assistant
phase: https://developers.openai.com/api/docs/guides/deployment-checklist#set-up-the-assistant-phase-parameterWe found this while debugging forked-agent prompt caching. Replayed inter-agent mailbox items could cross the
ResponseInputItem::Message->ResponseItem::Messageboundary without their assistant phase, which made the same assistant history replay with different phases across resumed or forked sessions.Validation
cd codex-rs && just fmtcd codex-rs && cargo test -p codex-protocolcd codex-rs && just fix -p codex-protocolcd codex-rs && just fix -p codex-corecd codex-rs && just argument-comment-lint