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mcp: introduce Requests (#267)

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Handlers and client/server methods take a single request argument
combining the session and params. This slightly simplifies the signature
for handlers, since there is no longer an often-ignored session
argument.

But more importantly, it opens the door to adding more information in
requests, such as auth info and HTTP request headers.

For #243.
This commit is contained in:
Jonathan Amsterdam 2025-08-12 17:49:50 -04:00 • committed by GitHub
commit 6e03217c83
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GPG key ID: B5690EEEBB952194
1 changed files with 517 additions and 380 deletions
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22
examples/server/sequentialthinking/main.go
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@ -231,8 +231,8 @@ func deepCopyThoughts(thoughts []*Thought) []*Thought {
}
// StartThinking begins a new sequential thinking session for a complex problem.
func StartThinking(ctx context.Context, ss *mcp.ServerSession, params *mcp.CallToolParamsFor[StartThinkingArgs]) (*mcp.CallToolResultFor[any], error) {
args := params.Arguments
func StartThinking(ctx context.Context, req *mcp.ServerRequest[*mcp.CallToolParamsFor[StartThinkingArgs]]) (*mcp.CallToolResultFor[any], error) {
args := req.Params.Arguments
sessionID := args.SessionID
if sessionID == "" {
@ -266,8 +266,8 @@ func StartThinking(ctx context.Context, ss *mcp.ServerSession, params *mcp.CallT
}
// ContinueThinking adds the next thought step, revises a previous step, or creates a branch in the thinking process.
func ContinueThinking(ctx context.Context, ss *mcp.ServerSession, params *mcp.CallToolParamsFor[ContinueThinkingArgs]) (*mcp.CallToolResultFor[any], error) {
args := params.Arguments
func ContinueThinking(ctx context.Context, req *mcp.ServerRequest[*mcp.CallToolParamsFor[ContinueThinkingArgs]]) (*mcp.CallToolResultFor[any], error) {
args := req.Params.Arguments
// Handle revision of existing thought
if args.ReviseStep != nil {
@ -395,8 +395,8 @@ func ContinueThinking(ctx context.Context, ss *mcp.ServerSession, params *mcp.Ca
}
// ReviewThinking provides a complete review of the thinking process for a session.
func ReviewThinking(ctx context.Context, ss *mcp.ServerSession, params *mcp.CallToolParamsFor[ReviewThinkingArgs]) (*mcp.CallToolResultFor[any], error) {
args := params.Arguments
func ReviewThinking(ctx context.Context, req *mcp.ServerRequest[*mcp.CallToolParamsFor[ReviewThinkingArgs]]) (*mcp.CallToolResultFor[any], error) {
args := req.Params.Arguments
// Get a snapshot of the session to avoid race conditions
sessionSnapshot, exists := store.SessionSnapshot(args.SessionID)
@ -434,11 +434,11 @@ func ReviewThinking(ctx context.Context, ss *mcp.ServerSession, params *mcp.Call
}
// ThinkingHistory handles resource requests for thinking session data and history.
func ThinkingHistory(ctx context.Context, ss *mcp.ServerSession, params *mcp.ReadResourceParams) (*mcp.ReadResourceResult, error) {
func ThinkingHistory(ctx context.Context, req *mcp.ServerRequest[*mcp.ReadResourceParams]) (*mcp.ReadResourceResult, error) {
// Extract session ID from URI (e.g., "thinking://session_123")
u, err := url.Parse(params.URI)
u, err := url.Parse(req.Params.URI)
if err != nil {
return nil, fmt.Errorf("invalid thinking resource URI: %s", params.URI)
return nil, fmt.Errorf("invalid thinking resource URI: %s", req.Params.URI)
}
if u.Scheme != "thinking" {
return nil, fmt.Errorf("invalid thinking resource URI scheme: %s", u.Scheme)
@ -456,7 +456,7 @@ func ThinkingHistory(ctx context.Context, ss *mcp.ServerSession, params *mcp.Rea
return &mcp.ReadResourceResult{
Contents: []*mcp.ResourceContents{
{
URI: params.URI,
URI: req.Params.URI,
MIMEType: "application/json",
Text: string(data),
},
@ -478,7 +478,7 @@ func ThinkingHistory(ctx context.Context, ss *mcp.ServerSession, params *mcp.Rea
return &mcp.ReadResourceResult{
Contents: []*mcp.ResourceContents{
{
URI: params.URI,
URI: req.Params.URI,
MIMEType: "application/json",
Text: string(data),
},