TypeLoadException on .NET 10 with Azure Functions OpenAPI Extension

[LalithaBalapareddy]

After upgrading our Azure Functions project to .NET 10 (isolated worker), the OpenAPI extension fails to start. The app runs fine on .NET 8 with the same package versions.

Error

System.TypeLoadException:
Method 'GetOpenApiFormat' in type
'Microsoft.Azure.Functions.Worker.Extensions.OpenApi.OpenApiHttpTriggerContext'
does not have an implementation

Environment

Microsoft.Azure.Functions.Worker.Extensions.OpenApi v1.6.0
Microsoft.Azure.Functions.Worker v2.0.0
TargetFramework: net10.0
Isolated worker process

Reproduction Steps

Create a .NET 10 Azure Functions app (isolated worker).
Install the OpenAPI extension NuGet package.
Run the function — fails with the above TypeLoadException.

Additional Notes

Downgrading to .NET 8 works fine with the same package versions.
We are looking for guidance on whether .NET 10 is officially supported, or any workarounds to make it work.

Question

Is there a stable version of the OpenAPI extension planned for .NET 10?
Are there any recommended workarounds to avoid this startup failure?