[Bug] Anthropic API Error: Missing Tool Result Block

Bug Description
All of my other sessions of Claude Code have worked fine, but this failed randomly with this error.

API Error: 400 {"type":"error","error":{"type":"invali
d_request_error","message":"messages.89: tool_use
ids were found without tool_result blocks
immediately after: toolu_01LzAZRHGLKsPQ3TUqZHr1fg.
Each tool_use block must have a corresponding
tool_result block in the next message."},"request_id
":"req_011CTj1QbwUzszWRAkKzACCq"}

Environment Info

• Platform: darwin
• Terminal: windsurf
• Version: 2.0.5
• Feedback ID:

Errors

[{"error":"AxiosError: Request failed with status code 403\n    at fN (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:715:1077)\n    at Unzip.z0 (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:716:9955)\n    at Unzip.emit (node:events:520:35)\n    at Unzip.emit (node:domain:489:12)\n    at endReadableNT (node:internal/streams/readable:1701:12)\n    at process.processTicksAndRejections (node:internal/process/task_queues:90:21)\n    at vQ1.request (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:718:2088)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async YWA (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:891:25807)","timestamp":"2025-10-02T20:13:45.308Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.89: `tool_use` ids were found without `tool_result` blocks immediately after: toolu_01LzAZRHGLKsPQ3TUqZHr1fg. Each `tool_use` block must have a corresponding `tool_result` block in the next message.\"},\"request_id\":\"req_011CTiz2Nh2gF3HHb2hfoRpb\"}\n    at B4.generate (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:895:18688)\n    at yP.makeStatusError (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1034:2131)\n    at yP.makeRequest (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1034:5344)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async E2B.dG1.model (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1120:39804)\n    at async dG1 (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1120:27733)\n    at async E2B (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1120:39958)\n    at async file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1120:34180\n    at async ZH0 (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1120:9568)\n    at async r11 (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1120:34150)","timestamp":"2025-10-02T20:14:03.009Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.89: `tool_use` ids were found without `tool_result` blocks immediately after: toolu_01LzAZRHGLKsPQ3TUqZHr1fg. Each `tool_use` block must have a corresponding `tool_result` block in the next message.\"},\"request_id\":\"req_011CTiz3J3Fwr1zKXF6EbH1s\"}\n    at B4.generate (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:895:18688)\n    at yP.makeStatusError (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1034:2131)\n    at yP.makeRequest (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1034:5344)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async E2B.dG1.model (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1120:39804)\n    at async dG1 (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1120:27733)\n    at async E2B (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1120:39958)\n    at async file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1120:34180\n    at async ZH0 (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1120:9568)\n    at async r11 (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1120:34150)","timestamp":"2025-10-02T20:14:15.313Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.89: `tool_use` ids were found without `tool_result` blocks immediately after: toolu_01LzAZRHGLKsPQ3TUqZHr1fg. Each `tool_use` block must have a corresponding `tool_result` block in the next message.\"},\"request_id\":\"req_011CTj1QbwUzszWRAkKzACCq\"}\n    at B4.generate (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:895:18688)\n    at yP.makeStatusError (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1034:2131)\n    at yP.makeRequest (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1034:5344)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async

Note: Error logs were truncated.