[Bug] Claude hallucinates paper content when fetch fails, generates recommendations based on fabricated data

Bug Description
Hallucinated content on a paper it couldn't fetch and just started making recommendations based on the hallucination

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 2.1.109
• Feedback ID: 174605d7-1ee5-47d3-ae17-7cc3a4ecca58

Errors

[{"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"}]