v1 cannot process issues with JPEGs in them #495
Description
Describe the bug
Claude GitHub Action fails with an API error when processing GitHub issues that contain uploaded images. The error indicates a media type mismatch where the base64 image data doesn't match the expected PNG format.
To Reproduce
Steps to reproduce the behavior:
- Create a GitHub issue in a repository with Claude GitHub Action enabled
- Upload an image directly to the issue (drag and drop or paste)
- Mention @claude in the issue to trigger the action
- Claude responds with an API error about image format mismatch
Expected behavior
Claude should be able to process issues containing images, either by:
- Correctly handling various image formats (JPEG, PNG, etc.)
- Gracefully skipping image content if unable to process
- Converting images to the correct format before sending to the API
Screenshots
The error message received:
{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01WnM9ZBxs2vCwhKiSdzoJmn","type":"tool_result","content":[{"type":"image","source":{"type":"base64","data":"/9j/4AAQSkZJRgABAQAASABIAAD/4QBARXhpZgAATU0AKgAAAA
...
API Error: 400 {
"type":"error",
"error":{
"type":"invalid_request_error",
"message":"messages.1.content.6.image.source.base64.data: Image does not match the provided media type image/png"
},
"request_id":"req_011CSYPDcYC4wR98Ljz3ke1u"
}
API Provider
[x] Anthropic First-Party API (default)
[ ] AWS Bedrock
[ ] GCP Vertex
Additional context
- The issue appears to be related to how the GitHub Action processes embedded images in issues
- The base64 image data appears to be JPEG format (based on the /9j/ header which is typical for JPEG) but is being sent with a PNG media type
- This prevents Claude from analyzing issues that contain screenshots or other visual content
- Action version: @v1 (latest)