[Go] googlegenai.VertexAI and modelgarden.Anthropic plugins cannot coexist

[pano-skylakis]

Describe the bug

Registering both googlegenai.VertexAI and vertexai/modelgarden.Anthropic plugins in the same Genkit app panics at startup because both plugins return "vertexai" from Name(), and RegisterPlugin enforces unique names.

This makes it impossible to use Gemini and Vertex Model Garden models together in a single Genkit Go application via Vertex AI.

To Reproduce

package main

  import (
        "context"
        "github.com/firebase/genkit/go/genkit"
        "github.com/firebase/genkit/go/plugins/googlegenai"
        "github.com/firebase/genkit/go/plugins/vertexai/modelgarden"
  )

  func main() {
        ctx := context.Background()
        _ = genkit.Init(ctx,
                genkit.WithPlugins(
                        &googlegenai.VertexAI{
                                ProjectID: "my-project",
                                Location:  "us-central1",
                        },
                        &modelgarden.Anthropic{
                                ProjectID: "my-project",
                                Location:  "us-central1",
                        },
                ),
        )
  }

Error: panic: plugin "vertexai" is already registered

Expected behavior
Both plugins should initialise without conflict.

Runtime:

• OS: macOS
• Version: Darwin 25

Go version:

• 1.24.6

Genkit version:

• v1.5.0

Fix:

Rename the modelgarden plugin to modelgarden - tested this locally and it works fine.