[Go] ai.GenerateWithRequest: model not found

[devaprakashganapathi]

Describe the bug
When using Generate with Tools, the response is always an error with ai.GenerateWithRequest: model %q not found
To Reproduce
The sample present for mcp-client in the samples themselves doesn't work.

genkit.Generate -> ai.Generate (creates a new registry to register tools) -> GenerateWithRequest -> LookupModel -> core.ResolveActionFor -> r.ResolveAction(looks for plugins registered but there aren't any registered to the child registry) -> returns no Action, fails with model not found.

Expected behavior

genkit.Generate -> ai.Generate (creates a new registry to register tools) -> GenerateWithRequest -> LookupModel -> core.ResolveActionFor -> r.ResolveAction(looks for plugins registered to all parent registries) -> returns Actions and succeeds with generation.

Screenshots
If applicable, add screenshots to help explain your problem.

Runtime (please complete the following information):

• OS: MacOS
• Version 26.8

** Go version

• 1.24.7-alpine

Additional context
Add any other context about the problem here.

[devaprakashganapathi]

Found a workaround

plugin:=&googlegenai.GoogleAI{}
g := genkit.Init(ctx, genkit.WithPlugins(plugin))
genkit.RegisterAction(g, plugin.ResolveAction(api.ActionTypeModel, "gemini-2.5-flash"))

[hugoaguirre]

Hey @devaprakashganapathi, I will take a closer look at this today.
Thanks for the submission

[apascal07]

Found a workaround

plugin:=&googlegenai.GoogleAI{} g := genkit.Init(ctx, genkit.WithPlugins(plugin)) genkit.RegisterAction(g, plugin.ResolveAction(api.ActionTypeModel, "gemini-2.5-flash"))

Hi Deva, this shouldn't be necessary, this is a bug. We'll sort it out.