Internal Release 0.5.2

Added
- Added stdio transport functionality.
Changed
- Added stdio details to the README.

lib/model_context_protocol/server.rb

@@ -28,7 +28,7 @@ module ModelContextProtocol
       @tools = tools.to_h { |t| [t.name_value, t] }
       @prompts = prompts.to_h { |p| [p.name_value, p] }
       @resources = resources
-      @resource_index = resources.index_by(&:uri)
+      @resource_index = index_resources_by_uri(resources)
       @context = context
       @configuration = ModelContextProtocol.configuration.merge(configuration)
       @handlers = {
@@ -205,5 +205,11 @@ module ModelContextProtocol
     def report_exception(exception, context = {})
       configuration.exception_reporter.call(exception, context)
     end
+
+    def index_resources_by_uri(resources)
+      resources.each_with_object({}) do |resource, hash|
+        hash[resource.uri] = resource
+      end
+    end
   end
 end

lib/model_context_protocol/transport.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+module ModelContextProtocol
+  class Transport
+    def initialize(server)
+      @server = server
+    end
+
+    def send_response(response)
+      raise NotImplementedError, "Subclasses must implement send_response"
+    end
+
+    def open
+      raise NotImplementedError, "Subclasses must implement open"
+    end
+
+    def close
+      raise NotImplementedError, "Subclasses must implement close"
+    end
+
+    private
+
+    def handle_request(request)
+      response = @server.handle(request)
+      send_response(response) if response
+    end
+
+    def handle_json_request(request)
+      response = @server.handle_json(request)
+      send_response(response) if response
+    end
+  end
+end

lib/model_context_protocol/transports/stdio.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require_relative "../transport"
+require "json"
+
+module ModelContextProtocol
+  module Transports
+    class StdioTransport < Transport
+      def initialize(server)
+        @server = server
+        @open = false
+        super
+      end
+
+      def open
+        @open = true
+        while @open && (line = $stdin.gets)
+          handle_json_request(line.strip)
+        end
+      end
+
+      def close
+        @open = false
+      end
+
+      def send_response(message)
+        json_message = message.is_a?(String) ? message : JSON.generate(message)
+        $stdout.puts(json_message)
+        $stdout.flush
+      end
+    end
+  end
+end

lib/model_context_protocol/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module ModelContextProtocol
-  VERSION = "0.5.1"
+  VERSION = "0.5.2"
 end