[Go] mcp.NewMCPManager doesn't exist

[jeremyberglund-airspace]

Describe the bug
The docs show that there should be an MCPManager included in the GO MCP plugin, but this isn't actually implement anywhere as far as I can tell.

To Reproduce

package main

import (
    "context"
    
    "github.com/firebase/genkit/go/genkit"
    "github.com/firebase/genkit/go/plugins/mcp"
)

func main() {
    ctx := context.Background()
    g, _ := genkit.Init(ctx)
    
    // undefined: mcp.NewMCPManager <--
    manager, err := mcp.NewMCPManager(mcp.MCPManagerOptions{
      // ...
    })
}

Expected behavior
mcp.NewMCPManager should exist

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

Runtime (please complete the following information):

• OS: [e.g. Linux, MacOS] MacOS
• Version [e.g. 22] 15.6.1

** Go version 1.24.3

• run go version at paste here

Additional context
Add any other context about the problem here.

[OpenSourceGHub]

The issue is due to the import "github.com/firebase/genkit/go/plugins/mcp". This is because undefined: NewMCPManager means that there is no NewMCPManager exported symbol in the package. I've reviewed the "github.com/firebase/genkit/go/plugins/mcp" link, and the package doesn't exist in the public repo.

[OpenSourceGHub]

It must have been moved somewhere else.

[hugoaguirre]

Hey @jeremyberglund-airspace, @OpenSourceGHub, thanks for the submission. NewMCPManager got renamed to NewMCPHost. I'll update the documentation for MCP plugin in a PR, but in the meantime, you can use the following code snip as a reference on how to use the new API:

	// Create a host with multiple servers
	host, err := mcp.NewMCPHost(g, mcp.MCPHostOptions{
		Name: "my-app",
		MCPServers: []mcp.MCPServerConfig{
			{
				Name: "everything-server",
				Config: mcp.MCPClientOptions{
					Name: "everything-server",
					Stdio: &mcp.StdioConfig{
						Command: "npx",
						Args:    []string{"-y", "@modelcontextprotocol/server-everything"},
					},
				},
			},
			{
				Name: "fs-server",
				Config: mcp.MCPClientOptions{
					Name: "fs-server",
					Stdio: &mcp.StdioConfig{
						Command: "npx",
						Args:    []string{"@modelcontextprotocol/server-filesystem", "/tmp"},
					},
				},
			},
		},
	})
	if err != nil {
		log.Fatal(err)
	}

[jeremyberglund-airspace]

@hugoaguirre Perfect, thanks!