[Bug] Anthropic API Error: Concurrent Tool Use Causing 400 Bad Request

Resolved 💬 8 comments Opened Oct 10, 2025 by ewheelerinc Closed Jan 10, 2026

Bug Description
⎿  API Error: 400 due to tool use concurrency issues. Run /rewind to recover the conversation.
I seem to get these errors all the time. I am not sure what the problem is, but it is extremely annoying when it should succeed. Maybe you need to perform locking on different files.

Environment Info

  • Platform: linux
  • Terminal: vte-based
  • Version: 2.0.11
  • Feedback ID: a13574ce-f0c1-4387-9328-a813146fd656

Errors

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