[Go/Docs] Incorrect error handling example for genkit.Init in tool-calling documentation

[kazu-gor]

Description:

The tool-calling documentation shows an incorrect example for genkit.Init that includes error handling, but the actual genkit.Init function does not return an error.

Current documentation example (incorrect):

g, err := genkit.Init(ctx,
    genkit.WithPlugins(&googlegenai.GoogleAI{}),
    genkit.WithDefaultModel("googleai/gemini-1.5-flash"), // Updated model name
)
if err != nil {
    log.Fatalf("Genkit initialization failed: %v", err)
}

Issue:

This code will result in a compilation error because genkit.Init only returns a single value (*Genkit), not a tuple.

Actual function signature:

The actual signature of genkit.Init is:

func Init(ctx context.Context, opts ...GenkitOption) *Genkit

Source: go/genkit/genkit.go#L164

Correct example:

g := genkit.Init(ctx,
    genkit.WithPlugins(&googlegenai.GoogleAI{}),
    genkit.WithDefaultModel("googleai/gemini-1.5-flash"), // Updated model name
)

Suggested fix:

Update the documentation to remove the error handling pattern from the genkit.Init example, as the function does not return an error.

[hugoaguirre]

Hi @kazu-gor, thanks for pointing this out. We will address this shortly!