Invalid request format

[Novtopro]

Checks

• I have searched existing issues and discussions
• I can reproduce this with the latest main or release

Describe the bug

Steps to reproduce

No response

Provider type

Remote provider

Model name

All

Osaurus version / commit

v0.14.18

macOS version

26.3.1

Apple Silicon chip

M4 Pro 24G

Xcode version

No response

Logs

Screenshots

No response

[Novtopro]

For strict responses item, the type is required, but it would be good to support OpenAI style shorthand message item as well.