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Allow stable protocol specification version "2025-11-25"

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The MCP specification dated 2025-11-25 has been released:

- https://modelcontextprotocol.io/specification/2025-11-25
- https://blog.modelcontextprotocol.io/posts/2025-11-25-first-mcp-anniversary

This PR allows `'2025-11-25'` to be specified for the `:protocol_version` keyword argument
in `MCP::Configuration.new`.
This commit is contained in:
Koichi ITO 2025-11-26 12:27:15 +09:00
commit 67e03d7b3d
4 changed files with 14 additions and 12 deletions
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14
README.md
View file

@ -173,7 +173,7 @@ class ApplicationController < ActionController::Base
def index
server = MCP::Server.new(
name: "my_server",
title: "Example Server Display Name", # WARNING: This is a `Draft` and is not supported in the `Version 2025-06-18 (latest)` specification.
title: "Example Server Display Name",
version: "1.0.0",
instructions: "Use the tools of this server as a last resort",
tools: [SomeTool, AnotherTool],
@ -392,7 +392,7 @@ This gem provides a `MCP::Tool` class that can be used to create tools in three
```ruby
class MyTool < MCP::Tool
title "My Tool" # WARNING: This is a `Draft` and is not supported in the `Version 2025-06-18 (latest)` specification.
title "My Tool"
description "This tool performs specific functionality..."
input_schema(
properties: {
@ -429,7 +429,7 @@ tool = MyTool
```ruby
tool = MCP::Tool.define(
name: "my_tool",
title: "My Tool", # WARNING: This is a `Draft` and is not supported in the `Version 2025-06-18 (latest)` specification.
title: "My Tool",
description: "This tool performs specific functionality...",
annotations: {
read_only_hint: true,
@ -660,7 +660,7 @@ The `MCP::Prompt` class provides three ways to create prompts:
```ruby
class MyPrompt < MCP::Prompt
prompt_name "my_prompt" # Optional - defaults to underscored class name
title "My Prompt" # WARNING: This is a `Draft` and is not supported in the `Version 2025-06-18 (latest)` specification.
title "My Prompt"
description "This prompt performs specific functionality..."
arguments [
MCP::Prompt::Argument.new(
@ -699,7 +699,7 @@ prompt = MyPrompt
```ruby
prompt = MCP::Prompt.define(
name: "my_prompt",
title: "My Prompt", # WARNING: This is a `Draft` and is not supported in the `Version 2025-06-18 (latest)` specification.
title: "My Prompt",
description: "This prompt performs specific functionality...",
arguments: [
MCP::Prompt::Argument.new(
@ -824,7 +824,7 @@ The `MCP::Resource` class provides a way to register resources with the server.
resource = MCP::Resource.new(
uri: "https://example.com/my_resource",
name: "my-resource",
title: "My Resource", # WARNING: This is a `Draft` and is not supported in the `Version 2025-06-18 (latest)` specification.
title: "My Resource",
description: "Lorem ipsum dolor sit amet",
mime_type: "text/html",
)
@ -857,7 +857,7 @@ The `MCP::ResourceTemplate` class provides a way to register resource templates
resource_template = MCP::ResourceTemplate.new(
uri_template: "https://example.com/my_resource_template",
name: "my-resource-template",
title: "My Resource Template", # WARNING: This is a `Draft` and is not supported in the `Version 2025-06-18 (latest)` specification.
title: "My Resource Template",
description: "Lorem ipsum dolor sit amet",
mime_type: "text/html",
)

6
lib/mcp/configuration.rb
View file

@ -2,8 +2,10 @@
module MCP
class Configuration
LATEST_STABLE_PROTOCOL_VERSION = "2025-06-18"
SUPPORTED_STABLE_PROTOCOL_VERSIONS = [LATEST_STABLE_PROTOCOL_VERSION, "2025-03-26", "2024-11-05"]
LATEST_STABLE_PROTOCOL_VERSION = "2025-11-25"
SUPPORTED_STABLE_PROTOCOL_VERSIONS = [
LATEST_STABLE_PROTOCOL_VERSION, "2025-06-18", "2025-03-26", "2024-11-05",
]
attr_writer :exception_reporter, :instrumentation_callback

2
lib/mcp/server.rb
View file

@ -174,7 +174,7 @@ module MCP
private
def validate!
# NOTE: The draft protocol version is the next version after 2025-03-26.
# NOTE: The draft protocol version is the next version after 2025-11-25.
if @configuration.protocol_version <= "2025-03-26"
if server_info.key?(:title)
message = "Error occurred in server_info. `title` is not supported in protocol version 2025-03-26 or earlier"

4
test/mcp/configuration_test.rb
View file

@ -53,7 +53,7 @@ module MCP
Configuration.new(protocol_version: "DRAFT-2025-v3")
end
assert_equal("protocol_version must be 2025-06-18, 2025-03-26, or 2024-11-05", exception.message)
assert_equal("protocol_version must be 2025-11-25, 2025-06-18, 2025-03-26, or 2024-11-05", exception.message)
end
test "raises ArgumentError when protocol_version is not a supported protocol version" do
@ -62,7 +62,7 @@ module MCP
custom_version = "2025-03-27"
config.protocol_version = custom_version
end
assert_equal("protocol_version must be 2025-06-18, 2025-03-26, or 2024-11-05", exception.message)
assert_equal("protocol_version must be 2025-11-25, 2025-06-18, 2025-03-26, or 2024-11-05", exception.message)
end
test "raises ArgumentError when protocol_version is not a boolean value" do