Internal Release v0.1.1

- implement `Prompt`
- adjust Tool approach
- update readme for tool calling
- document usage of `Prompt`

lib/model_context_protocol/json_rpc/request.rb

@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require "json"
+
+module ModelContextProtocol
+  module JsonRPC
+    class Request
+      class << self
+        def parse(json)
+          parsed = JSON.parse(json)
+          from_h(parsed)
+        rescue JSON::ParserError => e
+          raise ParseError.new(message: e.message)
+        end
+
+        private
+
+        def from_h(hash)
+          new(version: hash["jsonrpc"], method: hash["method"], params: hash["params"], id: hash["id"])
+        end
+      end
+
+      attr_reader :version, :method, :params, :id
+
+      def initialize(version:, method:, params: nil, id: nil)
+        @version = version
+        @method = method
+        @params = params
+        @id = id
+      end
+
+      def notification?
+        id.nil?
+      end
+
+      def valid?
+        @version == JsonRPC::VERSION && !method.start_with?("rpc.")
+      end
+
+      def method_not_found!
+        raise MethodNotFoundError.new(message: "Method not found #{method}")
+      end
+
+      def validate!
+        raise InvalidRequestError.new(message: "Method cannot start with 'rpc.'") if method.start_with?("rpc.")
+        raise InvalidRequestError.new(message: "Invalid JSON-RPC version") unless valid?
+      end
+    end
+  end
+end