Function stripCallerFieldFromAssistantMessage

src/utils/messages.ts:1742–1772

(
  message: AssistantMessage,
)

 * AFTER normalizeMessagesForAPI has already run, so inputs are already normalized.
 */
export function stripCallerFieldFromAssistantMessage(
  message: AssistantMessage,
): AssistantMessage {
  const hasCallerField = message.message.content.some(
    block =>
      block.type === 'tool_use' && 'caller' in block && block.caller !== null,
  )

  if (!hasCallerField) {
    return message
  }

  return {
    ...message,
    message: {
      ...message.message,
      content: message.message.content.map(block => {
        if (block.type !== 'tool_use') {
          return block
        }
        // Explicitly construct with only standard API fields
        return {
          type: 'tool_use' as const,
          id: block.id,
          name: block.name,
          input: block.input,
        }
      }),
    },
  }
}

/**
 * Does the content array have a tool_result block whose inner content