{"record":{"id":"efbc6cf1d0c35969","repo":"jackwener/OpenCLI","slug":"no-conversation-history-found-in-trae-cn","errorCode":null,"errorMessage":"No conversation history found in Trae CN.","messagePattern":"No conversation history found in Trae CN\\.","errorType":"exception","errorClass":"EmptyResultError","httpStatus":null,"severity":"error","filePath":"clis/trae-cn/utils.js","lineNumber":673,"sourceCode":"export function responseAfterScript(beforeCount, maxChars = 0) {\n  return `\n    (function() {\n      const turns = Array.from(document.querySelectorAll('${TRAE_CN_TURN_SELECTOR}'));\n      const after = turns.slice(${JSON.stringify(beforeCount)});\n      const assistant = after.reverse().find(turn => (turn.getAttribute('data-role') || '').toLowerCase() === 'assistant' || turn.classList.contains('assistant'));\n      if (!assistant) return null;\n      const read = ${readMessagesScript(1, maxChars)};\n      const rows = read;\n      const last = rows[rows.length - 1];\n      return last && last.Role === 'Assistant' ? last : null;\n    })()\n  `;\n}\n\nexport async function readTraeMessages(page, limit = 20, maxChars = 0) {\n  const messages = await page.evaluate(readMessagesScript(limit, maxChars));\n  if (!messages || messages.length === 0) {\n    throw new EmptyResultError('trae-cn read', 'No conversation history found in Trae CN.');\n  }\n  return messages;\n}\n\nexport async function sendTraePrompt(page, text) {\n  const prompt = ensurePrompt(text);\n  const beforeCount = await page.evaluate(countTurnsScript());\n  const injected = await page.evaluate(injectPromptScript(prompt));\n  if (!injected?.ok) throw selectorError('Trae CN chat input');\n  await page.wait(0.3);\n  const submitted = await page.evaluate(submitPromptScript());\n  let mode = submitted?.mode || 'unknown';\n  if (!submitted?.ok) {\n    if (submitted?.reason === 'send_button_disabled' && typeof page.pressKey === 'function') {\n      await page.pressKey('Enter');\n      await page.wait(0.8);\n      mode = 'keyboard';\n    } else {","sourceCodeStart":655,"sourceCodeEnd":691,"githubUrl":"https://github.com/jackwener/OpenCLI/blob/49907e53dc3ade5c223ff0c4c2c2785687cec4e6/clis/trae-cn/utils.js#L655-L691","documentation":"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.","triggerScenarios":"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.","commonSituations":"Newly opened projects, cleared chat history, or Trae CN version upgrades that altered the message markup.","solutions":["Start a conversation in Trae CN before running read","Wait for the chat panel to fully load, then retry","Verify the Trae CN version is still compatible with this library's selectors"],"exampleFix":"// before\nconst msgs = await readTraeMessages(page);\n// after\nawait page.wait(1.5); // let panel render\nconst msgs = await readTraeMessages(page);","handlingStrategy":"try-catch","validationCode":"const info = await page.evaluate(inspectTraeShellScript());\nif (!info || info.hasConversation === false) throw new SkipError('no conversation present; skipping read');","typeGuard":"const hasMessages = (m) => Array.isArray(m) && m.length > 0;","tryCatchPattern":"try { messages = await readTraeMessages(page, limit); } catch (e) { if (e instanceof EmptyResultError) { messages = []; console.warn('No Trae CN history yet'); } else throw e; }","preventionTips":["Ensure a conversation exists in the workspace before reading","Wait for the chat panel to render before scraping","Re-verify selectors after Trae CN upgrades"],"tags":["automation","empty-result","dom-scraping"],"backgroundTag":"empty-result-set","analyzedSha":"49907e53dc3ade5c223ff0c4c2c2785687cec4e6","analyzedAt":"2026-08-29T08:14:47.543Z","schemaVersion":2},"datasetVersion":"2026-08-29T12:17:43.993Z"}