[Bug] Anthropic API Error: Invalid `signature` in thinking block

Bug Description
API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.1.content.0: Invalid signature in
thinking block"},"request_id":"req_011CUdL49e3Fu9bCKbWF6cXD"}

Environment Info

• Platform: linux
• Terminal: vscode
• Version: 2.0.29
• Feedback ID: 1e50d51d-389b-46d1-b70b-72a68c9c2f7e

Errors

[{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.1.content.0: Invalid `signature` in `thinking` block\"},\"request_id\":\"req_011CUdL35eQXNbDzvTu7vtQo\"}\n    at D4.generate (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:203:83066)\n    at uy.makeStatusError (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:357:2117)\n    at uy.makeRequest (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:357:5330)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async OtA.model (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:3355:18888)\n    at async OtA (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:2693:39781)\n    at async lb2 (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:3355:19040)\n    at async file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:3355:13007\n    at async Jo1 (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:3355:4492)\n    at async p4A (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:3355:12977)","timestamp":"2025-10-30T11:47:22.884Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.1.content.0: Invalid `signature` in `thinking` block\"},\"request_id\":\"req_011CUdL49e3Fu9bCKbWF6cXD\"}\n    at D4.generate (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:203:83066)\n    at uy.makeStatusError (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:357:2117)\n    at uy.makeRequest (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:357:5330)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async OtA.model (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:3355:18888)\n    at async OtA (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:2693:39781)\n    at async lb2 (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:3355:19040)\n    at async file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:3355:13007\n    at async Jo1 (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:3355:4492)\n    at async p4A (file:///home/node/.nvm/versions/node/v22.9.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:3355:12977)","timestamp":"2025-10-30T11:47:37.250Z"}]