refactor: simplify to only support current schema version

Author: claude

cmd/publisher/commands/publish.go

@@ -38,7 +38,7 @@ func PublishCommand(args []string) error {
 		return fmt.Errorf("invalid server.json: %w", err)
 	}
 
-	// Validate $schema field is required and must be a valid schema URL
+	// Validate $schema field is required and must be the current schema URL
 	if serverJSON.Schema == "" {
 		return fmt.Errorf(`$schema field is required.
 
@@ -48,10 +48,10 @@ Add the following to your server.json:
 📖 Schema reference: https://github.com/modelcontextprotocol/registry/tree/main/docs/reference/server-json`, model.CurrentSchemaURL)
 	}
 
-	if !model.IsValidSchemaURL(serverJSON.Schema) {
+	if serverJSON.Schema != model.CurrentSchemaURL {
 		return fmt.Errorf(`invalid $schema URL: %s
 
-Update your server.json to use a valid schema URL, e.g.:
+Update your server.json to use:
   "$schema": "%s"
 
 📖 Schema reference: https://github.com/modelcontextprotocol/registry/tree/main/docs/reference/server-json`, serverJSON.Schema, model.CurrentSchemaURL)

internal/validators/validators.go

@@ -58,8 +58,8 @@ func ValidateServerJSON(serverJSON *apiv0.ServerJSON) error {
 	if serverJSON.Schema == "" {
 		return fmt.Errorf("$schema field is required. Use: %s", model.CurrentSchemaURL)
 	}
-	if !model.IsValidSchemaURL(serverJSON.Schema) {
-		return fmt.Errorf("invalid $schema URL: %s. Must be one of the valid schema URLs (e.g., %s)", serverJSON.Schema, model.CurrentSchemaURL)
+	if serverJSON.Schema != model.CurrentSchemaURL {
+		return fmt.Errorf("invalid $schema URL: %s. Must be: %s", serverJSON.Schema, model.CurrentSchemaURL)
 	}
 
 	// Validate server name exists and format

internal/validators/validators_test.go

@@ -33,7 +33,7 @@ func TestValidate(t *testing.T) {
 			expectedError: "$schema field is required",
 		},
 		{
-			name: "Schema version rejects old schema (2025-01-27)",
+			name: "Schema version rejects old schema",
 			serverDetail: apiv0.ServerJSON{
 				Schema:      "https://static.modelcontextprotocol.io/schemas/2025-01-27/server.schema.json",
 				Name:        "com.example/test-server",
@@ -46,62 +46,6 @@ func TestValidate(t *testing.T) {
 			},
 			expectedError: "invalid $schema URL",
 		},
-		{
-			name: "Schema version accepts 2025-10-11 schema",
-			serverDetail: apiv0.ServerJSON{
-				Schema:      "https://static.modelcontextprotocol.io/schemas/2025-10-11/server.schema.json",
-				Name:        "com.example/test-server",
-				Description: "A test server",
-				Repository: &model.Repository{
-					URL:    "https://github.com/owner/repo",
-					Source: "github",
-				},
-				Version: "1.0.0",
-			},
-			expectedError: "",
-		},
-		{
-			name: "Schema version accepts 2025-09-29 schema",
-			serverDetail: apiv0.ServerJSON{
-				Schema:      "https://static.modelcontextprotocol.io/schemas/2025-09-29/server.schema.json",
-				Name:        "com.example/test-server",
-				Description: "A test server",
-				Repository: &model.Repository{
-					URL:    "https://github.com/owner/repo",
-					Source: "github",
-				},
-				Version: "1.0.0",
-			},
-			expectedError: "",
-		},
-		{
-			name: "Schema version accepts 2025-09-16 schema",
-			serverDetail: apiv0.ServerJSON{
-				Schema:      "https://static.modelcontextprotocol.io/schemas/2025-09-16/server.schema.json",
-				Name:        "com.example/test-server",
-				Description: "A test server",
-				Repository: &model.Repository{
-					URL:    "https://github.com/owner/repo",
-					Source: "github",
-				},
-				Version: "1.0.0",
-			},
-			expectedError: "",
-		},
-		{
-			name: "Schema version accepts 2025-07-09 schema",
-			serverDetail: apiv0.ServerJSON{
-				Schema:      "https://static.modelcontextprotocol.io/schemas/2025-07-09/server.schema.json",
-				Name:        "com.example/test-server",
-				Description: "A test server",
-				Repository: &model.Repository{
-					URL:    "https://github.com/owner/repo",
-					Source: "github",
-				},
-				Version: "1.0.0",
-			},
-			expectedError: "",
-		},
 		{
 			name: "Schema version rejects random URL",
 			serverDetail: apiv0.ServerJSON{

pkg/model/constants.go

@@ -39,41 +39,5 @@ const (
 	CurrentSchemaVersion = "2025-10-17"
 	// CurrentSchemaURL is the full URL to the current schema
 	CurrentSchemaURL = "https://static.modelcontextprotocol.io/schemas/" + CurrentSchemaVersion + "/server.schema.json"
-	// SchemaURLPrefix is the common prefix for all schema URLs
-	SchemaURLPrefix = "https://static.modelcontextprotocol.io/schemas/"
-	// SchemaURLSuffix is the common suffix for all schema URLs
-	SchemaURLSuffix = "/server.schema.json"
 )
 
-// ValidSchemaVersions is the list of all accepted schema versions.
-// This is used by validators to accept any valid schema version (not just the current one).
-// TODO: Consider only supporting more recent schema versions.
-var ValidSchemaVersions = []string{
-	"2025-10-17",
-	"2025-10-11",
-	"2025-09-29",
-	"2025-09-16",
-	"2025-07-09",
-}
-
-// IsValidSchemaURL checks if the given schema URL is a valid MCP server schema URL.
-// It must match the pattern: https://static.modelcontextprotocol.io/schemas/{version}/server.schema.json
-// where {version} is one of the valid schema versions.
-func IsValidSchemaURL(schemaURL string) bool {
-	for _, version := range ValidSchemaVersions {
-		expectedURL := SchemaURLPrefix + version + SchemaURLSuffix
-		if schemaURL == expectedURL {
-			return true
-		}
-	}
-	return false
-}
-
-// ValidSchemaURLs returns the list of all valid schema URLs.
-func ValidSchemaURLs() []string {
-	urls := make([]string, len(ValidSchemaVersions))
-	for i, version := range ValidSchemaVersions {
-		urls[i] = SchemaURLPrefix + version + SchemaURLSuffix
-	}
-	return urls
-}