73b018c1e1
This release focuses primarily on changes related to the internal session architecture. It also removes some publicly exposed methods that are effectively obsolete.
223 lines
6.4 KiB
Markdown
223 lines
6.4 KiB
Markdown
# Changelog
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All notable changes to this project will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [Unreleased]
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## [0.10.0] - 2026-03-30
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### Added
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- Session expiry controls for `StreamableHTTPTransport` via `session_idle_timeout:` option (#268)
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### Changed
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- `ServerSession` for per-connection state (#275)
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### Removed
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- Remove `Server#notify_progress` broadcast API (#276)
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- Remove undocumented handler override methods (#270)
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### Fixed
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- Reject POST requests without session ID in stateful mode (#274)
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## [0.9.2] - 2026-03-27
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### Fixed
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- Use accessor method in `server_context_with_meta` instead of ivar (#273)
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- Reject duplicate SSE connections with 409 to prevent stream hijacking
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## [0.9.1] - 2026-03-23
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### Added
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- Allow `Client#call_tool` to accept a tool name (#266)
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### Fixed
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- Return 404 for invalid session ID in `handle_delete` (#261)
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## [0.9.0] - 2026-03-20
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### Added
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- `MCP::Client::Stdio` transport (#262)
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- Progress notifications per MCP specification (#254)
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- Automatic `_meta` parameter extraction support (#172)
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- CORS and Accept wildcard support for browser-based MCP clients (#253)
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### Changed
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- Use `autoload` to defer loading of unused subsystems (#255)
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- Reduce release package size (#239)
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### Fixed
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- Return 404 for invalid session ID in `handle_regular_request` (#257)
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- Use mutex-protected `session_exists?` in `handle_regular_request` (#258)
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## [0.8.0] - 2026-03-03
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### Added
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- `Content::EmbeddedResource` class for embedded resource content type (#244)
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- `Content::Audio` class for audio content type (#243)
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- `$ref` support in `Tool::Schema` for protocol version 2025-11-25 (#242)
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- MCP conformance test suite (#248)
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### Fixed
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- Handle `Errno::ECONNRESET` in SSE stream operations (#249)
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- Fix default handler return values to comply with MCP spec (#247)
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- Fix `Prompt#validate_arguments!` crash when arguments are `nil` (#246)
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- Return 202 Accepted for SSE responses per MCP spec (#245)
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- Fix `Content::Image#to_h` to return `mimeType` (camelCase) per MCP spec (#241)
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## [0.7.1] - 2026-02-21
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### Fixed
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- Fix `Resource::Contents#to_h` to use correct property names per MCP spec (#235)
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- Return JSON-RPC protocol errors for unknown tool calls (#231)
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- Fix `logging/setLevel` to return empty hash per MCP specification (#230)
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## [0.7.0] - 2026-02-14
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### Added
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- `logging` support (#103)
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- Protocol version negotiation to server initialization (#223)
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- Tool arguments to instrumentation data (#218)
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- Client info to instrumentation callback (#221)
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- `resource_templates` to `MCP::Client` (#225)
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### Changed
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- Extract `MCP::Annotations` into a dedicated file (#224)
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### Fixed
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- `Resource::Embedded` not setting `@resource` in `initialize` (#220)
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## [0.6.0] - 2026-01-16
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### Changed
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- Update licensing to Apache 2.0 for new contributions (#213)
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### Fixed
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- Omit `icons` from responses when empty or nil to reduce context window usage (#212)
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## [0.5.0] - 2026-01-11
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### Added
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- Protocol specification version "2025-11-25" support (#184)
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- `icons` parameter support (#205)
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- `websiteUrl` parameter in `serverInfo` (#188)
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- `description` parameter in `serverInfo` (#201)
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- `additionalProperties` support for schema validation (#198)
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- "Draft" protocol version to supported versions (#179)
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- `stateless` mode for high availability (#101)
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- Exception messages for tool call errors (#194)
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- Elicitation skeleton (#178)
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- `prompts/list` and `prompts/get` support to client (#163)
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- Accept header validation for HTTP client transport (#207)
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- Ruby 2.7 - Ruby 3.1 support (#206)
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### Changed
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- Make tool names stricter (#204)
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### Fixed
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- Symlink path comparison in schema validation (#193)
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- Duplicate tool names across namespaces now raise an error (#199)
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- Tool error handling to follow MCP spec (#165)
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- XSS vulnerability in json_rpc_handler (#175)
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## [0.4.0] - 2025-10-15
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### Added
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- Client resources support with `resources/list` and `resources/read` methods (#160)
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- `_meta` field support for Tool schema (#124)
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- `_meta` field support for Prompt
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- `title` field support for prompt arguments
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- `call_tool_raw` method to client for accessing full tool responses (#149)
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- Structured content support in tool responses (#147)
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- AGENTS.md development guidance documentation (#134)
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- Dependabot configuration for automated dependency updates (#138)
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### Changed
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- Set default `content` to empty array instead of `nil` (#150)
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- Improved prompt spec compliance (#153)
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- Allow output schema to be array of objects (#144)
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- Return 202 response code for accepted JSON-RPC notifications (#114)
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- Added validation to `MCP::Configuration` setters (#145)
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- Updated metaschema URI format for cross-OS compatibility
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### Fixed
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- Client tools functionality and test coverage (#166)
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- Client resources test for empty responses (#162)
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- Documentation typos and incorrect examples (#157, #146)
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- Removed redundant transport requires (#154)
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- Cleaned up unused block parameters and magic comments
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## [0.3.0] - 2025-09-14
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### Added
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- Tool output schema support with comprehensive validation (#122)
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- HTTP client transport layer for MCP clients (#28)
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- Tool annotations validation for protocol compatibility (#122)
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- Server instructions support (#87)
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- Title support in server info (#119)
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- Default values for tool annotation hints (#118)
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- Notifications/initialized method implementation (#84)
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### Changed
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- Make default protocol version the latest specification version (#83)
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- Protocol version validation to ensure valid values (#80)
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- Improved tool handling for tools with no arguments (#85, #86)
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- Better error handling and response API (#109)
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### Fixed
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- JSON-RPC notification format in Streamable HTTP transport (#91)
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- Errors when title is not specified (#126)
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- Tools with missing arguments handling (#86)
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- Namespacing issues in README examples (#89)
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## [0.2.0] - 2025-07-15
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### Added
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- Custom methods support via `define_custom_method` (#75)
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- Streamable HTTP transport implementation (#33)
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- Tool argument validation against schemas (#43)
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### Changed
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- Server context is now optional for Tools and Prompts (#54)
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- Improved capability handling and removed automatic capability determination (#61, #63)
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- Refactored architecture in preparation for client support (#27)
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### Fixed
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- Input schema validation for schemas without required fields (#73)
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- Error handling when sending notifications (#70)
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## [0.1.0] - 2025-05-30
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Initial release in collaboration with Shopify
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