Repeated 500 Internal Server Error during Claude Code session

Environment:

• Claude Code CLI on Windows 11 Pro
• Model: claude-opus-4-6
• Date: 2026-02-25

Issue:
Getting repeated 500 Internal Server Errors mid-session. The errors occur during normal tool usage, not during heavy processing.

API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CYVB4LhMaWAT6eQikcf3N"}

The same request_id appears twice, suggesting the retry also failed with the same error.

Steps to reproduce:

1. Start Claude Code session
2. Execute a tool call (Glob succeeds)
3. Next response triggers 500

Expected: Normal response
Actual: 500 Internal Server Error, repeated on retry

Request ID: req_011CYVB4LhMaWAT6eQikcf3N