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mcp: NewClient and NewServer take Implementation (#113)

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Change the name and version arguments to NewClient and NewServer to a
`*Implementation`, to future-proof against the spec.

Fixes #109.
This commit is contained in:
Jonathan Amsterdam 2025-07-10 16:57:38 -04:00 • committed by GitHub
commit 6c6243c0b0
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1 changed files with 76 additions and 69 deletions
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8
design/design.md
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@ -323,7 +323,7 @@ Sessions are created from either `Client` or `Server` using the `Connect` method
```go
type Client struct { /* ... */ }
func NewClient(name, version string, opts *ClientOptions) *Client
func NewClient(impl *Implementation, opts *ClientOptions) *Client
func (*Client) Connect(context.Context, Transport) (*ClientSession, error)
func (*Client) Sessions() iter.Seq[*ClientSession]
// Methods for adding/removing client features are described below.
@ -338,7 +338,7 @@ func (*ClientSession) Wait() error
// For example: ClientSession.ListTools.
type Server struct { /* ... */ }
func NewServer(name, version string, opts *ServerOptions) *Server
func NewServer(impl *Implementation, opts *ServerOptions) *Server
func (*Server) Connect(context.Context, Transport) (*ServerSession, error)
func (*Server) Sessions() iter.Seq[*ServerSession]
// Methods for adding/removing server features are described below.
@ -356,7 +356,7 @@ func (*ServerSession) Wait() error
Here's an example of these APIs from the client side:
```go
client := mcp.NewClient("mcp-client", "v1.0.0", nil)
client := mcp.NewClient(&mcp.Implementation{Name:"mcp-client", Version:"v1.0.0"}, nil)
// Connect to a server over stdin/stdout
transport := mcp.NewCommandTransport(exec.Command("myserver"))
session, err := client.Connect(ctx, transport)
@ -371,7 +371,7 @@ A server that can handle that client call would look like this:
```go
// Create a server with a single tool.
server := mcp.NewServer("greeter", "v1.0.0", nil)
server := mcp.NewServer(&mcp.Implementation{Name:"greeter", Version:"v1.0.0"}, nil)
mcp.AddTool(server, &mcp.Tool{Name: "greet", Description: "say hi"}, SayHi)
// Run the server over stdin/stdout, until the client disconnects.
if err := server.Run(context.Background(), mcp.NewStdioTransport()); err != nil {