Allow specifying a server version

lib/model_context_protocol/server.rb

@@ -6,6 +6,8 @@ require_relative "methods"
 
 module ModelContextProtocol
   class Server
+    DEFAULT_VERSION = "0.1.0"
+
     class RequestHandlerError < StandardError
       attr_reader :error_type
       attr_reader :original_error
@@ -20,10 +22,11 @@ module ModelContextProtocol
 
     include Instrumentation
 
-    attr_accessor :name, :tools, :prompts, :resources, :server_context, :configuration, :capabilities
+    attr_accessor :name, :version, :tools, :prompts, :resources, :server_context, :configuration, :capabilities
 
     def initialize(
       name: "model_context_protocol",
+      version: DEFAULT_VERSION,
       tools: [],
       prompts: [],
       resources: [],
@@ -33,6 +36,7 @@ module ModelContextProtocol
       capabilities: { prompts: {}, resources: {}, tools: {} }
     )
       @name = name
+      @version = version
       @tools = tools.to_h { |t| [t.name_value, t] }
       @prompts = prompts.to_h { |p| [p.name_value, p] }
       @resources = resources
@@ -153,7 +157,7 @@ module ModelContextProtocol
     def server_info
       @server_info ||= {
         name:,
-        version: ModelContextProtocol::VERSION,
+        version:,
       }
     end