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Merge pull request #179 from koic/add_draft_version

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Add "Draft" protocol version to supported protocol versions
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Koichi ITO 2025-11-22 01:57:51 +09:00 • committed by GitHub
commit 11aea51c42
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1 changed files with 106 additions and 9 deletions
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17
lib/mcp/server.rb
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@ -106,6 +106,8 @@ module MCP
def define_prompt(name: nil, title: nil, description: nil, arguments: [], &block)
prompt = Prompt.define(name:, title:, description:, arguments:, &block)
@prompts[prompt.name_value] = prompt
validate!
end
def define_custom_method(method_name:, &block)
@ -171,6 +173,21 @@ module MCP
private
def validate!
# NOTE: The draft protocol version is the next version after 2025-03-26.
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"
raise ArgumentError, message
end
primitive_titles = [@tools.values, @prompts.values, @resources, @resource_templates].flatten.map(&:title)
if primitive_titles.any?
message = "Error occurred in #{primitive_titles.join(", ")}. `title` is not supported in protocol version 2025-03-26 or earlier"
raise ArgumentError, message
end
end
if @configuration.protocol_version == "2024-11-05"
if @instructions
message = "`instructions` supported by protocol version 2025-03-26 or higher"