Function isNativeReasoningBlock

cli/src/utils/block-operations.ts:329–334

(block: ContentBlock | undefined)

 * Native reasoning blocks have textType === 'reasoning' but thinkingOpen === undefined.
 */
export const isNativeReasoningBlock = (block: ContentBlock | undefined): boolean => {
  if (!block || block.type !== 'text') {
    return false
  }
  return block.textType === 'reasoning' && block.thinkingOpen === undefined
}

/**
 * Closes native reasoning blocks within a specific agent's blocks.