claude-code/packages/builtin-tools/src/tools/SendMessageTool/UI.tsx

import React from 'react'
import { MessageResponse } from 'src/components/MessageResponse.js'
import { Text } from '@anthropic/ink'
import { jsonParse } from 'src/utils/slowOperations.js'
import type { Input, SendMessageToolOutput } from './SendMessageTool.js'

export function renderToolUseMessage(input: Partial<Input>): React.ReactNode {
  if (typeof input.message !== 'object' || input.message === null) {
    return null
  }
  if (input.message.type === 'plan_approval_response') {
    return input.message.approve
      ? `approve plan from: ${input.to}`
      : `reject plan from: ${input.to}`
  }
  return null
}

export function renderToolResultMessage(
  content: SendMessageToolOutput | string,
  _progressMessages: unknown,
  { verbose }: { verbose: boolean },
): React.ReactNode {
  const result: SendMessageToolOutput =
    typeof content === 'string' ? jsonParse(content) : content

  if ('routing' in result && result.routing) {
    return null
  }

  if ('request_id' in result && 'target' in result) {
    return null
  }

  return (
    <MessageResponse>
      <Text dimColor>{result.message}</Text>
    </MessageResponse>
  )
}