[Bug] Anthropic API Error: HTTP 400 Bad Request

Resolved 💬 5 comments Opened Dec 2, 2025 by mafiaboyhacker Closed Feb 1, 2026

Bug Description
api 400 error

Environment Info

  • Platform: win32
  • Terminal: vscode
  • Version: 2.0.56
  • Feedback ID: 3ee61a37-17fa-43f0-b599-c8c6894c4383

Errors

[{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2170:754)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Yd5 (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2292:16383)","timestamp":"2025-12-02T10:56:17.636Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2170:754)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Yd5 (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2292:16383)","timestamp":"2025-12-02T10:56:40.776Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2170:754)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Yd5 (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2292:16383)","timestamp":"2025-12-02T10:56:42.740Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2170:754)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Yd5 (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2292:16383)","timestamp":"2025-12-02T11:00:47.531Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2170:754)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Yd5 (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2292:16383)","timestamp":"2025-12-02T11:00:49.623Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2170:754)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Yd5 (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2292:16383)","timestamp":"2025-12-02T11:01:00.040Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2170:754)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Yd5 (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2292:16383)","timestamp":"2025-12-02T11:01:05.764Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2170:754)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Yd5 (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2292:16383)","timestamp":"2025-12-02T11:01:17.589Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2170:754)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Yd5 (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2292:16383)","timestamp":"2025-12-02T11:01:40.656Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2170:754)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Yd5 (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2292:16383)","timestamp":"2025-12-02T11:01:42.912Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/TK/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2170:754)\n    at process.processTicksAndRejections (node:internal/p

Note: Error logs were truncated.

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