Skip to content

Release 0.20.0 #404

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
koic merged 1 commit into from
Jun 14, 2026
+22 −1
Merged

Release 0.20.0 #404

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
21 changes: 21 additions & 0 deletions CHANGELOG.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,27 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0

## [Unreleased]

## [0.20.0] - 2026-06-14

### Added

- Support W3C Trace Context Propagation via `_meta` per SEP-414 (#397)
- Support OAuth `client_credentials` grant in OAuth client (#399)
- Add `annotations` field to `MCP::Resource` and `MCP::ResourceTemplate` per MCP specification (#403)

### Changed

- Re-run OAuth flow on 403 `insufficient_scope` (step-up) (#368)
- Speed up `Tool::Schema` validation by 5x to 100x (#369)
- Use JSON-RPC error envelope for `StreamableHTTPTransport` errors (#371)
- Pin RFC 8414 default well-known suffix per SEP-2351 (#395)
- Default missing `MCP-Protocol-Version` to `2025-03-26` in `StreamableHTTPTransport` (#392)

### Fixed

- Preserve the request ID in invalid request error responses (#400)
- Standardize Resource Not Found errors on -32602 with URI data per SEP-2164 (#402)

## [0.19.0] - 2026-06-13

### Added
Expand Down
2 changes: 1 addition & 1 deletion lib/mcp/version.rb
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
# frozen_string_literal: true

module MCP
VERSION = "0.19.0"
VERSION = "0.20.0"
end