Function updateAgentText

cli/src/utils/block-operations.ts:25–93

(
  blocks: ContentBlock[],
  agentId: string,
  update: AgentTextUpdate,
)

  | { type: 'text'; mode: 'replace'; content: string }

const updateAgentText = (
  blocks: ContentBlock[],
  agentId: string,
  update: AgentTextUpdate,
) => {
  return updateBlocksRecursively(blocks, agentId, (block) => {
    if (block.type !== 'agent') {
      return block
    }

    const agentBlocks = block.blocks ? [...block.blocks] : []
    const text = update.content ?? ''

    if (update.mode === 'replace') {
      const updatedBlocks = [...agentBlocks]
      let replaced = false

      for (let i = updatedBlocks.length - 1; i >= 0; i--) {
        const entry = updatedBlocks[i]
        if (entry.type === 'text') {
          replaced = true
          if (entry.content === text && block.content === text) {
            return block
          }
          updatedBlocks[i] = { ...entry, content: text }
          break
        }
      }

      if (!replaced) {
        updatedBlocks.push({ type: 'text', content: text })
      }

      return {
        ...block,
        content: text,
        blocks: updatedBlocks,
      }
    }

    if (!text) {
      return block
    }

    // Handle native reasoning chunks for agent blocks
    if (update.textType === 'reasoning') {
      const updatedAgentBlocks = appendNativeReasoningToBlocks(agentBlocks, text)
      const updatedContent = (block.content ?? '') + text
      return {
        ...block,
        content: updatedContent,
        blocks: updatedAgentBlocks,
      }
    }

    // For regular text: first close any open native reasoning block, then use think tag parsing
    const blocksWithClosedReasoning = closeNativeReasoningBlock(agentBlocks)
    const updatedAgentBlocks = appendTextWithThinkParsingToBlocks(