[BUG] API Error API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages: text content blocks must be non-empty"},"request_id":"req_011CaRipzf8eEY2mRuZKHEpk"}

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?

Sometimes an image is accidentally sent (because I am used to it with other platforms and it is accepted) without any text in the textbox. I get this error and have to start a new session, which screws up everything ... the flow of the chat/directions/etc

What Should Happen?

Allow an image to be sent with no text in the text box like every other AI platform

Error Messages/Logs

API Error
API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages: text content blocks must be non-empty"},"request_id":"req_011CaRipzf8eEY2mRuZKHEpk"}

Steps to Reproduce

paste image and click send

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

4.7

Claude Code Version

Claude Code Desktop (Windows)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_