jackwener/OpenCLI · error · EmptyResultError

No conversation history found in Trae CN.

Error message

No conversation history found in Trae CN.

What it means

readTraeMessages evaluates an in-page script to collect Trae CN conversation history and throws EmptyResultError when the page yields no messages. This signals the automation reached the UI but found no readable conversation turns, not a crash.

Source

Thrown at clis/trae-cn/utils.js:673

export function responseAfterScript(beforeCount, maxChars = 0) {
  return `
    (function() {
      const turns = Array.from(document.querySelectorAll('${TRAE_CN_TURN_SELECTOR}'));
      const after = turns.slice(${JSON.stringify(beforeCount)});
      const assistant = after.reverse().find(turn => (turn.getAttribute('data-role') || '').toLowerCase() === 'assistant' || turn.classList.contains('assistant'));
      if (!assistant) return null;
      const read = ${readMessagesScript(1, maxChars)};
      const rows = read;
      const last = rows[rows.length - 1];
      return last && last.Role === 'Assistant' ? last : null;
    })()
  `;
}

export async function readTraeMessages(page, limit = 20, maxChars = 0) {
  const messages = await page.evaluate(readMessagesScript(limit, maxChars));
  if (!messages || messages.length === 0) {
    throw new EmptyResultError('trae-cn read', 'No conversation history found in Trae CN.');
  }
  return messages;
}

export async function sendTraePrompt(page, text) {
  const prompt = ensurePrompt(text);
  const beforeCount = await page.evaluate(countTurnsScript());
  const injected = await page.evaluate(injectPromptScript(prompt));
  if (!injected?.ok) throw selectorError('Trae CN chat input');
  await page.wait(0.3);
  const submitted = await page.evaluate(submitPromptScript());
  let mode = submitted?.mode || 'unknown';
  if (!submitted?.ok) {
    if (submitted?.reason === 'send_button_disabled' && typeof page.pressKey === 'function') {
      await page.pressKey('Enter');
      await page.wait(0.8);
      mode = 'keyboard';
    } else {

View on GitHub (pinned to 49907e53dc)

Solutions

1. Start a conversation in Trae CN before running read
2. Wait for the chat panel to fully load, then retry
3. Verify the Trae CN version is still compatible with this library's selectors

Example fix

// before
const msgs = await readTraeMessages(page);
// after
await page.wait(1.5); // let panel render
const msgs = await readTraeMessages(page);

const info = await page.evaluate(inspectTraeShellScript());
if (!info || info.hasConversation === false) throw new SkipError('no conversation present; skipping read');

const hasMessages = (m) => Array.isArray(m) && m.length > 0;

try { messages = await readTraeMessages(page, limit); } catch (e) { if (e instanceof EmptyResultError) { messages = []; console.warn('No Trae CN history yet'); } else throw e; }

When it happens

Trigger: Reading history in a fresh workspace with no conversation yet, a Trae CN UI update changing DOM selectors the readMessagesScript relies on, or reading before the chat panel has rendered.

Common situations: Newly opened projects, cleared chat history, or Trae CN version upgrades that altered the message markup.

Understand the failure class

Background: EmptyResultError / "no results found": when an API or scraper succeeds but returns zero rows — this error's family across 9 libraries.

Related errors

• discord-app servers
• No messages found in /chat/${id}.
• No chat turns found on current page.
• No assistant message visible.
• opencli notebooklm open

AI-assisted analysis of jackwener/OpenCLI@49907e53dc (2026-08-29). Data as JSON: /api/errors/efbc6cf1d0c35969. Report an issue: GitHub.