The key of the agent instance this item belongs to.
The commit status of this history item.
The content blocks of this history item.
The key of the AI Agent Task or ad-hoc sub-process element instance under which this item was produced.
The unique key for this history item. Stable and sortable by creation order.
The sequential iteration number this item belongs to. Null if not provided by the connector.
The key of the job activation during which this item was produced.
The lease token of the activation that produced this item.
Per-call token and latency metrics. Present on ASSISTANT items only.
The connector-side timestamp of when this message was produced.
The role of this history item in the conversation.
Tool calls for this item. Empty for USER items and ASSISTANT items with no tool dispatches. ASSISTANT items: dispatched tool calls with arguments populated. TOOL_RESULT items: single-entry array referencing the originating tool call (arguments null).
A single conversation history item belonging to an agent instance.