Function getMessagePreview

src/components/Spinner/TeammateSpinnerLine.tsx:29–71

* Extract the last 3 lines of content from a teammate's conversation. * Shows recent activity from any message type (user or assistant).

(messages: InProcessTeammateTaskState['messages'])

 * Shows recent activity from any message type (user or assistant).
 */
function getMessagePreview(messages: InProcessTeammateTaskState['messages']): string[] {
  if (!messages?.length) return [];
  const allLines: string[] = [];
  const maxLineLength = 80;

  // Collect lines from recent messages (newest first)
  for (let i = messages.length - 1; i >= 0 && allLines.length < 3; i--) {
    const msg = messages[i];
    // Only process messages that have content (user/assistant messages)
    if (!msg || msg.type !== 'user' && msg.type !== 'assistant' || !msg.message?.content?.length) {
      continue;
    }
    const content = msg.message.content;
    for (const block of content) {
      if (allLines.length >= 3) break;
      if (!block || typeof block !== 'object') continue;
      if ('type' in block && block.type === 'tool_use' && 'name' in block) {
        // Try to show meaningful info from tool input
        const input = 'input' in block ? block.input as Record<string, unknown> : null;
        let toolLine = `Using ${block.name}…`;
        if (input) {
          // Look for common descriptive fields
          const desc = input.description as string | undefined || input.prompt as string | undefined || input.command as string | undefined || input.query as string | undefined || input.pattern as string | undefined;
          if (desc) {
            toolLine = desc.split('\n')[0] ?? toolLine;
          }
        }
        allLines.push(truncateToWidth(toolLine, maxLineLength));
      } else if ('type' in block && block.type === 'text' && 'text' in block) {
        const textLines = (block.text as string).split('\n').filter(l => l.trim());
        // Take from end of text (most recent lines)
        for (let j = textLines.length - 1; j >= 0 && allLines.length < 3; j--) {
          const line = textLines[j];
          if (!line) continue;
          allLines.push(truncateToWidth(line, maxLineLength));
        }
      }
    }
  }

  // Reverse so oldest of the 3 is first (reading order)
  return allLines.reverse();
}
export function TeammateSpinnerLine({
  teammate,
  isLast,