Function createHistoryItem

core/util/messageConversion.ts:203–213

(
  message: ChatMessage,
  contextItems: ContextItemWithId[] = [],
  toolCallStates?: ToolCallState[],
)

 * Create a ChatHistoryItem from a ChatMessage
 */
export function createHistoryItem(
  message: ChatMessage,
  contextItems: ContextItemWithId[] = [],
  toolCallStates?: ToolCallState[],
): ChatHistoryItem {
  return {
    message,
    contextItems,
    ...(toolCallStates && { toolCallStates }),
  };
}

/**
 * Handle tool result message by updating the corresponding tool call state