Use autoload to defer loading of unused subsystems#255
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koic merged 1 commit intomodelcontextprotocol:mainfrom Mar 15, 2026
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## Motivation and Context `lib/mcp.rb` currently declares all `require_relative` statements in one place. As a result, Server and Client are both loaded, the stdio and Streamable HTTP transports are both loaded, and Tool, Prompt, and Resource are all loaded, regardless of which components are actually used. These components are selected by the user depending on their use case, so loading everything upfront is unnecessary. Using `autoload` for selected constants defers loading until the constant is actually referenced, so only the subsystems required by the user are loaded. ## How Has This Been Tested? All existing tests pass unchanged. ## Breaking Change None. This change only defers loading of unused components.
atesgoral
approved these changes
Mar 14, 2026
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Motivation and Context
lib/mcp.rbcurrently declares allrequire_relativestatements in one place. As a result, Server and Client are both loaded, the stdio and Streamable HTTP transports are both loaded, and Tool, Prompt, and Resource are all loaded, regardless of which components are actually used.These components are selected by the user depending on their use case, so loading everything upfront is unnecessary.
Using
autoloadfor selected constants defers loading until the constant is actually referenced, so only the subsystems required by the user are loaded.How Has This Been Tested?
All existing tests pass unchanged.
Breaking Change
None. This change only defers loading of unused components.
Types of changes
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