Persistent 500 Internal Server Error on continue command

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Claude Code returns a 500 Internal Server Error repeatedly when attempting to use the continue command. The error persists across multiple retries in the same session. Three consecutive attempts all returned the same error type with different request IDs.

What Should Happen?

The continue command should resume the previous task without error.

Error Messages/Logs

API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CXoMZPQPbNWPQBY3HLJ9M"}
API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CXoMfQiSW5mHw9uhDqHao"}
API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CXoMjzPMHJxGh5MDZHaZW"}

Steps to Reproduce

Start a Claude Code session and begin a task
Encounter an initial API error or interruption
Type continue to resume
Observe repeated 500 errors on each retry

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude Code CLI

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

PowerShell

Additional Information

_No response_