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ruby-sdk/CHANGELOG.md
Koichi ITO 5331c237bd [Doc] Acknowledge Shopify in the initial release 
The repository's "About" section currently states,
"The official Ruby SDK for the Model Context Protocol. Maintained in collaboration with Shopify."
However, now that MCP governance has been established, maintenance is handled by the MCP steering group.

Given this, it seems more accurate to remove the maintenance wording from the "About" section.
That said, I think it would be good to preserve acknowledgment of Shopify, which originally developed and released the Ruby SDK.

There may be a more appropriate place for this, but at the very least, it could be recorded in the changelog as part of the project's history.
2026-01-25 16:11:27 +09:00

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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

[0.6.0] - 2026-01-16

Changed

  • Update licensing to Apache 2.0 for new contributions (#213)

Fixed

  • Omit icons from responses when empty or nil to reduce context window usage (#212)

[0.5.0] - 2026-01-11

Added

  • Protocol specification version "2025-11-25" support (#184)
  • icons parameter support (#205)
  • websiteUrl parameter in serverInfo (#188)
  • description parameter in serverInfo (#201)
  • additionalProperties support for schema validation (#198)
  • "Draft" protocol version to supported versions (#179)
  • stateless mode for high availability (#101)
  • Exception messages for tool call errors (#194)
  • Elicitation skeleton (#178)
  • prompts/list and prompts/get support to client (#163)
  • Accept header validation for HTTP client transport (#207)
  • Ruby 2.7 - Ruby 3.1 support (#206)

Changed

  • Make tool names stricter (#204)

Fixed

  • Symlink path comparison in schema validation (#193)
  • Duplicate tool names across namespaces now raise an error (#199)
  • Tool error handling to follow MCP spec (#165)
  • XSS vulnerability in json_rpc_handler (#175)

[0.4.0] - 2025-10-15

Added

  • Client resources support with resources/list and resources/read methods (#160)
  • _meta field support for Tool schema (#124)
  • _meta field support for Prompt
  • title field support for prompt arguments
  • call_tool_raw method to client for accessing full tool responses (#149)
  • Structured content support in tool responses (#147)
  • AGENTS.md development guidance documentation (#134)
  • Dependabot configuration for automated dependency updates (#138)

Changed

  • Set default content to empty array instead of nil (#150)
  • Improved prompt spec compliance (#153)
  • Allow output schema to be array of objects (#144)
  • Return 202 response code for accepted JSON-RPC notifications (#114)
  • Added validation to MCP::Configuration setters (#145)
  • Updated metaschema URI format for cross-OS compatibility

Fixed

  • Client tools functionality and test coverage (#166)
  • Client resources test for empty responses (#162)
  • Documentation typos and incorrect examples (#157, #146)
  • Removed redundant transport requires (#154)
  • Cleaned up unused block parameters and magic comments

[0.3.0] - 2025-09-14

Added

  • Tool output schema support with comprehensive validation (#122)
  • HTTP client transport layer for MCP clients (#28)
  • Tool annotations validation for protocol compatibility (#122)
  • Server instructions support (#87)
  • Title support in server info (#119)
  • Default values for tool annotation hints (#118)
  • Notifications/initialized method implementation (#84)

Changed

  • Make default protocol version the latest specification version (#83)
  • Protocol version validation to ensure valid values (#80)
  • Improved tool handling for tools with no arguments (#85, #86)
  • Better error handling and response API (#109)

Fixed

  • JSON-RPC notification format in Streamable HTTP transport (#91)
  • Errors when title is not specified (#126)
  • Tools with missing arguments handling (#86)
  • Namespacing issues in README examples (#89)

[0.2.0] - 2025-07-15

Added

  • Custom methods support via define_custom_method (#75)
  • Streamable HTTP transport implementation (#33)
  • Tool argument validation against schemas (#43)

Changed

  • Server context is now optional for Tools and Prompts (#54)
  • Improved capability handling and removed automatic capability determination (#61, #63)
  • Refactored architecture in preparation for client support (#27)

Fixed

  • Input schema validation for schemas without required fields (#73)
  • Error handling when sending notifications (#70)

[0.1.0] - 2025-05-30

Initial release in collaboration with Shopify