Error when attempting to read TGA file

[zaidka]

Description

I get the following error when the agent attempts to read a .tga file:

messages.2.content.0.tool_result.content.1.image.source.base64.media_type: Input should be 'image/jpeg', 'image/png', 'image/gif' or 'image/webp'

Strangely, I can only observe it happening when using one of the Anthropic models (e.g. Opus 4.5, Sonnet 4.5). Can't reproduce the issue with other models like Devstral Small 2.

Plugins

None

OpenCode version

1.1.36

Steps to reproduce

Simply ask the agent "Read the file example.tga" where example.tga is a valid TGA file.

Screenshot and/or share link

Operating System

Fedora 43

Terminal

ptyxis

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Issue with Editor crashing when encountering .ico favicon file #9785: Issue with Editor crashing when encountering .ico favicon file (same media_type validation error)
• Reading .fbs files fails with "Unsupported image mime type: image/vnd.fastbidsheet" #9210: Reading .fbs files fails with unsupported image mime type error (same root cause - invalid media types for vision models)
• Trying to read an invalid image file bricks the session #9512: Trying to read an invalid image file bricks the session (related image format validation issue)

Feel free to ignore if none of these address your specific case.

[github-actions]

To stay organized issues are automatically closed after 90 days of no activity. If the issue is still relevant please open a new one.