claude-code - 💡(How to fix) Fix [Bug] Claude hallucinates paper content when fetch fails, generates recommendations based on fabricated data [1 comments, 2 participants]

[{"error":"AxiosError: Request failed with status code 403\n at tF (/$bunfs/root/src/entrypoints/cli.js:110:1194)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:12744)\n at emit (node:events:92:22)\n at endReadableNT (internal:streams/readable:865:50)\n at processTicksAndRejections (native:7:39)\n at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-15T16:26:00.515Z"},{"error":"AxiosError: Request failed with status code 403\n at tF (/$bunfs/root/src/entrypoints/cli.js:110:1194)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:12744)\n at emit (node:events:92:22)\n at endReadableNT (internal:streams/readable:865:50)\n at processTicksAndRejections (native:7:39)\n at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-15T16:26:13.567Z"}]

TL;DR

The issue may be resolved by handling the AxiosError with a 403 status code, which indicates a forbidden request, and preventing the application from making recommendations based on hallucinated content.

Guidance

• Investigate the request being made by the application to determine why it's receiving a 403 status code, which could be due to authentication or permission issues.
• Modify the application to handle the AxiosError and prevent it from making recommendations based on hallucinated content when a request fails.
• Review the application's logic for fetching content and making recommendations to ensure it's robust and handles errors correctly.
• Consider adding logging or monitoring to detect when the application is making recommendations based on hallucinated content.

Example

try {
  const response = await axios.get('https://example.com/content');
  // Process the response
} catch (error) {
  if (error.response && error.response.status === 403) {
    // Handle the 403 error and prevent making recommendations
    console.error('Forbidden request');
  } else {
    // Handle other errors
    console.error('Error fetching content:', error);
  }
}

Notes

The provided information does not include the specific request being made or the application's logic for handling errors, so the guidance is general and may need to be adapted to the specific use case.

Recommendation

Apply workaround: The issue appears to be related to the application's handling of errors and hallucinated content, so applying a workaround to handle the AxiosError and prevent making recommendations based on hallucinated content is recommended.