[Bug] Anthropic API Error: Invalid tool_result block without corresponding tool_use

[Kevin-McIsaac]

Bug Description
I was using claude code and it did not complete. It shows disconnected and I cant recomment. I used teleport claude --teleport session_011CUodG12UHpWf6HYKJ97iT to run on my deskotp now I get the error ⎿ API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.2.content.1: unexpected tool_use_id
found in tool_result blocks: toolu_01TFQZVdAgEdnmsGYZ3qZhs1. Each tool_result block must have a corresponding tool_use block
in the previous message."},"request_id":"req_011CUokNANXZnaviTWyswzPa"}

Environment Info

• Platform: linux
• Terminal: xterm-256color
• Version: 2.0.33
• Feedback ID: 6e01ccde-2760-4ba8-8dea-841bbb9c8a58

Errors

[{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.2.content.1: unexpected `tool_use_id` found in `tool_result` blocks: toolu_01TFQZVdAgEdnmsGYZ3qZhs1. Each `tool_result` block must have a corresponding `tool_use` block in the previous message.\"},\"request_id\":\"req_011CUokNANXZnaviTWyswzPa\"}\n    at L4.generate (file:///home/kmcisaac/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:204:83066)\n    at E_.makeStatusError (file:///home/kmcisaac/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:689:2117)\n    at E_.makeRequest (file:///home/kmcisaac/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:689:5341)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async psA.model (file:///home/kmcisaac/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3394:14692)\n    at async psA (file:///home/kmcisaac/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1987:39781)\n    at async jn2 (file:///home/kmcisaac/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3394:14846)\n    at async file:///home/kmcisaac/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3394:8667\n    at async $10 (file:///home/kmcisaac/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3394:1970)\n    at async J8A (file:///home/kmcisaac/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3394:8637)","timestamp":"2025-11-04T23:52:21.441Z"}]

[github-actions]

Found 3 possible duplicate issues:

1. [Bug] Anthropic API Error: Invalid tool_result block without corresponding tool_use #11017
2. [BUG] Claude Code Web: teleport command randomly breaks due to 400 error #10321
3. [BUG] Conversation Compaction Corrupts Tool Use/Result Pairs #8484

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
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🤖 Generated with Claude Code

[rdhyee]

I'm experiencing the same issue. Here are my details:

Error message:

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.66.content.0: unexpected `tool_use_id` found in `tool_result` blocks: toolu_01N6yTMe3b3JTVd1ovn4DXKk. Each `tool_result` block must have a corresponding `tool_use` block in the previous message."},"request_id":"req_011CUtnaSm6iVoWWkmpERKVx"}

Context:

• Session ID: 011CUsD4ysC76c9bWy7xNjQq
• Message count: 66+ messages with extensive tool use (Read, Write, Edit, Git operations, WebSearch)
• Teleported from web → CLI
• First prompt after teleport: "Hey, we just finished building the Zotero sync tool. Set it up and test it now."

Impact: Session completely unusable after teleport. Same behavior as described in original issue - the tool_use/tool_result blocks get desynchronized during the teleport process.

Reproducibility: Happened on first attempt at teleporting a long development session (creating tooling infrastructure, multiple commits, extensive file operations).

+1 for prioritizing a fix - teleport is a key feature but currently unreliable with longer sessions involving tool use.