From c7b059cb9168efc0deb24ce6396c5ffc78d1ecc7 Mon Sep 17 00:00:00 2001
From: Koichi ITO <koic.ito@gmail.com>
Date: Thu, 14 May 2026 12:00:39 +0900
Subject: [PATCH] Release 0.16.0

New features and changes have landed, making it a good time to cut a release.
Further feature proposals can be incorporated in future releases.
---
 CHANGELOG.md       | 15 +++++++++++++++
 lib/mcp/version.rb |  2 +-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e844c797..5f2556e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.16.0] - 2026-05-14
+
+### Added
+
+- Add opt-in tool output validation (#344)
+
+### Changed
+
+- Advertise JSON Schema 2020-12 dialect on emitted tool schemas (#342)
+
+### Fixed
+
+- Preserve client tool output schemas (#343)
+- Fix missing `output_schema` argument in `define_tool` API (#301)
+
 ## [0.15.0] - 2026-05-05
 
 ### Added
diff --git a/lib/mcp/version.rb b/lib/mcp/version.rb
index 696262e4..4410816e 100644
--- a/lib/mcp/version.rb
+++ b/lib/mcp/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module MCP
-  VERSION = "0.15.0"
+  VERSION = "0.16.0"
 end