Changelog
All notable changes to the Raku MCP SDK are documented in this file.
[0.28.0] - 2026-01-29
Added
- Icons and title metadata on Tool, Resource, Prompt, ResourceTemplate, and Implementation (SEP-973)
- Expanded test coverage for progress tracking, error edge cases, and concurrent operations
IconDefinition type with src, mimeType, and sizes fields.title() and .icon() builder methods on all primitive builders
Changed
- Gap analysis and status docs updated to reflect full specification coverage
[0.27.0] - 2026-01-28
Added
- Legacy SSE transport for backwards compatibility with MCP spec 2024-11-05
- Enterprise IdP policy controls (SEP-990)
- OAuth client credentials for machine-to-machine authentication (SEP-1046)
- Dynamic client registration for OAuth
Changed
- Documentation cleanup: corrected completeness claims, added SSE references
[0.26.0] - 2025-12-15
Added
- Progress token support with
$*MCP-PROGRESS-TOKEN dynamic variable - Client-side progress Supply for typed Progress objects
- Logging level setting via
logging/setLevel and client set-log-level - Protocol version negotiation across 2024-11-05, 2025-03-26, and 2025-11-25
[0.25.0] - 2025-12-01
Added
- Tool name validation per SEP-986 (1-64 chars,
[a-zA-Z0-9_-]) - Resource templates with URI template pattern matching and builder API
- Prompt and resource list-changed notifications
[0.24.0] - 2025-11-15
Added
- Extensions framework with capability negotiation and method dispatch
- Extension registration,
experimental capabilities advertising
[0.23.0] - 2025-11-01
Added
- Sampling with tools (SEP-1577):
tools, toolChoice, includeContext in createMessage - Tasks framework for long-running async tool execution with status polling and cancellation
[0.22.0] - 2025-10-15
Added
- OAuth 2.1 authorization: PKCE, token management, server validation, metadata discovery
[0.21.0] - 2025-10-01
Added
- Tool output schemas with
outputSchema and structuredContent for structured results - Completion/autocomplete support with prompt and resource completers
- Elicitation support (form and URL modes) with handler callbacks
[0.20.0] - 2025-09-15
Added
- Streamable HTTP transport with session management, SSE streaming, and resumption
- Roots support: client roots configuration, server
list-roots, set-roots - Resource subscriptions: subscribe, unsubscribe, update notifications
[0.19.0] - 2025-09-01
Added
- Request cancellation with
notifications/cancelled - Pagination support for all list endpoints (tools, resources, prompts)
- Tool and resource annotations with builder API
Changed
- Updated to MCP protocol version 2025-11-25
[0.1.0] - 2025-07-01
Added
- Initial implementation
- JSON-RPC 2.0 message handling
- Stdio transport
- Tools, Resources, Prompts with builder API
- Server and Client initialization
- MCP protocol types and capabilities