[Bug] Claude ignores explicit instructions to read source code, uses outdated changelog instead

Bug Description
Even with literal and direct instructions to read the code, Claude tried to cut corners and read changelogs instead; result was the changelog was outdated and they presented that information as fact.

Environment Info

• Platform: win32
• Terminal: windows-terminal
• Version: 2.0.27
• Feedback ID: c0e11782-59ec-4b39-8555-821a6bb5124b

Errors

[{"error":"AxiosError: Request failed with status code 401\n    at UR (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:24:1136)\n    at IncomingMessage.<anonymous> (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:29:9845)\n    at IncomingMessage.emit (node:events:530:35)\n    at IncomingMessage.emit (node:domain:489:12)\n    at endReadableNT (node:internal/streams/readable:1698:12)\n    at process.processTicksAndRejections (node:internal/process/task_queues:90:21)\n    at g3A.request (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:31:2129)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async dh2 (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3574:15030)","timestamp":"2025-10-26T19:54:41.998Z"},{"error":"MaxFileReadTokenExceededError: File content (49223 tokens) exceeds maximum allowed tokens (25000). Please use offset and limit parameters to read specific portions of the file, or use the GrepTool to search for specific content.\n    at nb2 (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3390:1682)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Object.call (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3399:1001)\n    at async Bq (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:725:1185)\n    at async file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1265:1379","timestamp":"2025-10-26T19:56:42.533Z"},{"error":"MaxFileReadTokenExceededError: File content (55366 tokens) exceeds maximum allowed tokens (25000). Please use offset and limit parameters to read specific portions of the file, or use the GrepTool to search for specific content.\n    at nb2 (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3390:1682)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Object.call (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3399:1001)\n    at async Bq (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:725:1185)\n    at async file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1265:1379","timestamp":"2025-10-26T19:56:52.180Z"},{"error":"MaxFileReadTokenExceededError: File content (55366 tokens) exceeds maximum allowed tokens (25000). Please use offset and limit parameters to read specific portions of the file, or use the GrepTool to search for specific content.\n    at nb2 (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3390:1682)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Object.call (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3399:1001)\n    at async Bq (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:725:1185)\n    at async file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1265:1379","timestamp":"2025-10-26T19:56:59.394Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at JD (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1175:4413)\n    at file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1175:4141\n    at Array.map (<anonymous>)\n    at MF (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1175:4132)\n    at ATQ (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1798:6306)\n    at Cw (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:73:19414)\n    at Ao (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:75:42806)\n    at T9 (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:75:38347)\n    at Uc (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:75:38275)\n    at qw (file:///C:/Users/corde/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:75:38129)","timestamp":"2025-10-26T19:59:23.879Z"},{"error":"Error: Language not supported whil

Note: Error logs were truncated.