ryoppippi · github-actions · Jul 27, 2026
diff --git a/.changeset/pre.json b/.changeset/pre.json
@@ -50,6 +50,8 @@
     "spec-3002-servinfo-meta",
     "standard-header-ows",
     "standard-schema-elicitation",
+    "streamable-http-sse-keepalive",
+    "validator-dialect-dispatch",
     "web-standard-bearer-auth",
     "web-standard-oauth-metadata",
     "workerd-schema-preload"

diff --git a/packages/client/CHANGELOG.md b/packages/client/CHANGELOG.md
@@ -1,5 +1,14 @@
 # @modelcontextprotocol/client
 
+## 2.0.0-beta.6
+
+### Patch Changes
+
+- [#2534](https://github.com/modelcontextprotocol/typescript-sdk/pull/2534) [`f130e1a`](https://github.com/modelcontextprotocol/typescript-sdk/commit/f130e1ac5fcab34bd568f59907e0f2ce1d22074c) Thanks [@felixweinberger](https://github.com/felixweinberger)! - The default validator now honors declared 2019-09 and draft-07/06 dialects instead of rejecting them: a schema stamped `"$schema": "http://json-schema.org/draft-07/schema#"` (zod-to-json-schema's default output) validates with draft-07 semantics, and a 2019-09 stamp (zod-to-json-schema's `2019-09`/`openAi` targets) with 2019-09 semantics, on both the Ajv and Cloudflare Workers providers (with known engine differences documented in the migration guide). Schemas with no `$schema` still validate as 2020-12, and unknown dialects still produce the typed error (now listing the supported dialects: 2020-12, 2019-09, draft-07, draft-06).
+
+- Updated dependencies []:
+    - @modelcontextprotocol/core@2.0.0-beta.6
+
 ## 2.0.0-beta.5
 
 ### Minor Changes

diff --git a/packages/client/package.json b/packages/client/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@modelcontextprotocol/client",
-    "version": "2.0.0-beta.5",
+    "version": "2.0.0-beta.6",
     "description": "Model Context Protocol implementation for TypeScript - Client package",
     "license": "MIT",
     "author": "Anthropic, PBC (https://anthropic.com)",

diff --git a/packages/codemod/CHANGELOG.md b/packages/codemod/CHANGELOG.md
@@ -1,5 +1,7 @@
 # @modelcontextprotocol/codemod
 
+## 2.0.0-beta.6
+
 ## 2.0.0-beta.5
 
 ### Patch Changes

diff --git a/packages/codemod/package.json b/packages/codemod/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@modelcontextprotocol/codemod",
-    "version": "2.0.0-beta.5",
+    "version": "2.0.0-beta.6",
     "description": "Codemod to migrate MCP TypeScript SDK code from v1 to v2",
     "license": "MIT",
     "author": "Anthropic, PBC (https://anthropic.com)",

diff --git a/packages/core-internal/CHANGELOG.md b/packages/core-internal/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @modelcontextprotocol/core-internal
 
+## 2.0.0-beta.5
+
+### Patch Changes
+
+- Updated dependencies []:
+    - @modelcontextprotocol/core@2.0.0-beta.6
+
 ## 2.0.0-beta.4
 
 ### Minor Changes

diff --git a/packages/core-internal/package.json b/packages/core-internal/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@modelcontextprotocol/core-internal",
     "private": true,
-    "version": "2.0.0-beta.4",
+    "version": "2.0.0-beta.5",
     "description": "Model Context Protocol implementation for TypeScript - Core package",
     "license": "MIT",
     "author": "Anthropic, PBC (https://anthropic.com)",

diff --git a/packages/core/CHANGELOG.md b/packages/core/CHANGELOG.md
@@ -1,5 +1,7 @@
 # @modelcontextprotocol/core
 
+## 2.0.0-beta.6
+
 ## 2.0.0-beta.5
 
 ### Minor Changes

diff --git a/packages/core/package.json b/packages/core/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@modelcontextprotocol/core",
-    "version": "2.0.0-beta.5",
+    "version": "2.0.0-beta.6",
     "description": "Model Context Protocol for TypeScript — public Zod schemas (spec + OAuth/OpenID)",
     "license": "MIT",
     "author": "Anthropic, PBC (https://anthropic.com)",

diff --git a/packages/middleware/express/CHANGELOG.md b/packages/middleware/express/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @modelcontextprotocol/express
 
+## 2.0.0-beta.6
+
+### Patch Changes
+
+- Updated dependencies [[`470678d`](https://github.com/modelcontextprotocol/typescript-sdk/commit/470678d56b9ee2a365fcf6d3de21e3a8b32eeef5), [`f130e1a`](https://github.com/modelcontextprotocol/typescript-sdk/commit/f130e1ac5fcab34bd568f59907e0f2ce1d22074c)]:
+    - @modelcontextprotocol/server@2.0.0-beta.6
+
 ## 2.0.0-beta.5
 
 ### Patch Changes

diff --git a/packages/middleware/express/package.json b/packages/middleware/express/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@modelcontextprotocol/express",
     "private": false,
-    "version": "2.0.0-beta.5",
+    "version": "2.0.0-beta.6",
     "description": "Express adapters for the Model Context Protocol TypeScript server SDK - Express middleware",
     "license": "MIT",
     "author": "Anthropic, PBC (https://anthropic.com)",

diff --git a/packages/middleware/fastify/CHANGELOG.md b/packages/middleware/fastify/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @modelcontextprotocol/fastify
 
+## 2.0.0-beta.6
+
+### Patch Changes
+
+- Updated dependencies [[`470678d`](https://github.com/modelcontextprotocol/typescript-sdk/commit/470678d56b9ee2a365fcf6d3de21e3a8b32eeef5), [`f130e1a`](https://github.com/modelcontextprotocol/typescript-sdk/commit/f130e1ac5fcab34bd568f59907e0f2ce1d22074c)]:
+    - @modelcontextprotocol/server@2.0.0-beta.6
+
 ## 2.0.0-beta.5
 
 ### Patch Changes

diff --git a/packages/middleware/fastify/package.json b/packages/middleware/fastify/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@modelcontextprotocol/fastify",
     "private": false,
-    "version": "2.0.0-beta.5",
+    "version": "2.0.0-beta.6",
     "description": "Fastify adapters for the Model Context Protocol TypeScript server SDK - Fastify middleware",
     "license": "MIT",
     "author": "Anthropic, PBC (https://anthropic.com)",

diff --git a/packages/middleware/hono/CHANGELOG.md b/packages/middleware/hono/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @modelcontextprotocol/hono
 
+## 2.0.0-beta.6
+
+### Patch Changes
+
+- Updated dependencies [[`470678d`](https://github.com/modelcontextprotocol/typescript-sdk/commit/470678d56b9ee2a365fcf6d3de21e3a8b32eeef5), [`f130e1a`](https://github.com/modelcontextprotocol/typescript-sdk/commit/f130e1ac5fcab34bd568f59907e0f2ce1d22074c)]:
+    - @modelcontextprotocol/server@2.0.0-beta.6
+
 ## 2.0.0-beta.5
 
 ### Patch Changes

diff --git a/packages/middleware/hono/package.json b/packages/middleware/hono/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@modelcontextprotocol/hono",
     "private": false,
-    "version": "2.0.0-beta.5",
+    "version": "2.0.0-beta.6",
     "description": "Hono adapters for the Model Context Protocol TypeScript server SDK - Hono middleware",
     "license": "MIT",
     "author": "Anthropic, PBC (https://anthropic.com)",

diff --git a/packages/middleware/node/CHANGELOG.md b/packages/middleware/node/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @modelcontextprotocol/node
 
+## 2.0.0-beta.6
+
+### Patch Changes
+
+- Updated dependencies [[`470678d`](https://github.com/modelcontextprotocol/typescript-sdk/commit/470678d56b9ee2a365fcf6d3de21e3a8b32eeef5), [`f130e1a`](https://github.com/modelcontextprotocol/typescript-sdk/commit/f130e1ac5fcab34bd568f59907e0f2ce1d22074c)]:
+    - @modelcontextprotocol/server@2.0.0-beta.6
+
 ## 2.0.0-beta.5
 
 ### Patch Changes

diff --git a/packages/middleware/node/package.json b/packages/middleware/node/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@modelcontextprotocol/node",
-    "version": "2.0.0-beta.5",
+    "version": "2.0.0-beta.6",
     "description": "Model Context Protocol implementation for TypeScript - Node.js middleware",
     "license": "MIT",
     "author": "Anthropic, PBC (https://anthropic.com)",

diff --git a/packages/server-legacy/CHANGELOG.md b/packages/server-legacy/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @modelcontextprotocol/server-legacy
 
+## 2.0.0-beta.6
+
+### Patch Changes
+
+- Updated dependencies []:
+    - @modelcontextprotocol/core@2.0.0-beta.6
+
 ## 2.0.0-beta.5
 
 ### Patch Changes

diff --git a/packages/server-legacy/package.json b/packages/server-legacy/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@modelcontextprotocol/server-legacy",
     "private": false,
-    "version": "2.0.0-beta.5",
+    "version": "2.0.0-beta.6",
     "description": "Frozen v1 SSE transport and OAuth Authorization Server helpers for the Model Context Protocol TypeScript SDK. Deprecated; use StreamableHTTP and a dedicated OAuth server in production.",
     "deprecated": "This package is a frozen copy of v1's SSE transport and OAuth Authorization Server helpers for migration purposes only. Use StreamableHTTP from @modelcontextprotocol/server and a dedicated OAuth server in production. Will not receive new features.",
     "license": "MIT",

diff --git a/packages/server/CHANGELOG.md b/packages/server/CHANGELOG.md
@@ -1,5 +1,18 @@
 # @modelcontextprotocol/server
 
+## 2.0.0-beta.6
+
+### Minor Changes
+
+- [#2541](https://github.com/modelcontextprotocol/typescript-sdk/pull/2541) [`470678d`](https://github.com/modelcontextprotocol/typescript-sdk/commit/470678d56b9ee2a365fcf6d3de21e3a8b32eeef5) Thanks [@mattzcarey](https://github.com/mattzcarey)! - Add configurable SSE keep-alive comment frames to Streamable HTTP transports and apply `createMcpHandler`'s existing `keepAliveMs` option to every HTTP SSE stream it serves.
+
+### Patch Changes
+
+- [#2534](https://github.com/modelcontextprotocol/typescript-sdk/pull/2534) [`f130e1a`](https://github.com/modelcontextprotocol/typescript-sdk/commit/f130e1ac5fcab34bd568f59907e0f2ce1d22074c) Thanks [@felixweinberger](https://github.com/felixweinberger)! - The default validator now honors declared 2019-09 and draft-07/06 dialects instead of rejecting them: a schema stamped `"$schema": "http://json-schema.org/draft-07/schema#"` (zod-to-json-schema's default output) validates with draft-07 semantics, and a 2019-09 stamp (zod-to-json-schema's `2019-09`/`openAi` targets) with 2019-09 semantics, on both the Ajv and Cloudflare Workers providers (with known engine differences documented in the migration guide). Schemas with no `$schema` still validate as 2020-12, and unknown dialects still produce the typed error (now listing the supported dialects: 2020-12, 2019-09, draft-07, draft-06).
+
+- Updated dependencies []:
+    - @modelcontextprotocol/core@2.0.0-beta.6
+
 ## 2.0.0-beta.5
 
 ### Minor Changes

diff --git a/packages/server/package.json b/packages/server/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@modelcontextprotocol/server",
-    "version": "2.0.0-beta.5",
+    "version": "2.0.0-beta.6",
     "description": "Model Context Protocol implementation for TypeScript - Server package",
     "license": "MIT",
     "author": "Anthropic, PBC (https://anthropic.com)",