From 6f5ee9cec94cdb3544c4c541e6f92ce4a614d9f4 Mon Sep 17 00:00:00 2001
From: Felix Weinberger <fweinberger@anthropic.com>
Date: Wed, 15 Apr 2026 11:58:32 +0000
Subject: [PATCH 1/2] feat(compat): add StreamableHTTPServerTransport alias and
 EventStore type re-exports to @modelcontextprotocol/node

v1 code imports `StreamableHTTPServerTransport`, `EventStore`, `EventId`, and `StreamId` from `@modelcontextprotocol/sdk/server/streamableHttp.js`. Re-export them from `@modelcontextprotocol/node` (alias is `@deprecated`, types pass through from `@modelcontextprotocol/server`) so the migration is a package-name swap.
---
 .changeset/node-transport-v1-aliases.md      |  5 +++++
 packages/middleware/node/src/index.ts        |  7 +++++++
 packages/middleware/node/test/compat.test.ts | 19 +++++++++++++++++++
 3 files changed, 31 insertions(+)
 create mode 100644 .changeset/node-transport-v1-aliases.md
 create mode 100644 packages/middleware/node/test/compat.test.ts

diff --git a/.changeset/node-transport-v1-aliases.md b/.changeset/node-transport-v1-aliases.md
new file mode 100644
index 000000000..f404d0925
--- /dev/null
+++ b/.changeset/node-transport-v1-aliases.md
@@ -0,0 +1,5 @@
+---
+'@modelcontextprotocol/node': patch
+---
+
+Add v1-compat re-exports: `StreamableHTTPServerTransport` (alias for `NodeStreamableHTTPServerTransport`) and the `EventStore` / `EventId` / `StreamId` types, so v1 imports from `@modelcontextprotocol/sdk/server/streamableHttp.js` map cleanly onto `@modelcontextprotocol/node`.
diff --git a/packages/middleware/node/src/index.ts b/packages/middleware/node/src/index.ts
index 2e0d3c995..6316b6c28 100644
--- a/packages/middleware/node/src/index.ts
+++ b/packages/middleware/node/src/index.ts
@@ -1 +1,8 @@
 export * from './streamableHttp.js';
+
+// v1-compat re-exports.
+export {
+    /** @deprecated Use {@linkcode NodeStreamableHTTPServerTransport}. */
+    NodeStreamableHTTPServerTransport as StreamableHTTPServerTransport
+} from './streamableHttp.js';
+export type { EventId, EventStore, StreamId } from '@modelcontextprotocol/server';
diff --git a/packages/middleware/node/test/compat.test.ts b/packages/middleware/node/test/compat.test.ts
new file mode 100644
index 000000000..eb6759223
--- /dev/null
+++ b/packages/middleware/node/test/compat.test.ts
@@ -0,0 +1,19 @@
+import { describe, expect, expectTypeOf, it } from 'vitest';
+
+import { NodeStreamableHTTPServerTransport, StreamableHTTPServerTransport } from '../src/index.js';
+import type { EventId, EventStore, StreamId } from '../src/index.js';
+
+describe('v1 compat exports from @modelcontextprotocol/node', () => {
+    it('StreamableHTTPServerTransport aliases NodeStreamableHTTPServerTransport', () => {
+        expect(StreamableHTTPServerTransport).toBe(NodeStreamableHTTPServerTransport);
+        expectTypeOf<StreamableHTTPServerTransport>().toEqualTypeOf<NodeStreamableHTTPServerTransport>();
+    });
+
+    it('re-exports EventStore / EventId / StreamId types', () => {
+        // Type-level assertions: these compile only if the types are exported.
+        expectTypeOf<EventId>().toBeString();
+        expectTypeOf<StreamId>().toBeString();
+        expectTypeOf<EventStore>().toHaveProperty('storeEvent');
+        expectTypeOf<EventStore>().toHaveProperty('replayEventsAfter');
+    });
+});

From 55d3879aabf27997ce0db3ab51c166b647e0886b Mon Sep 17 00:00:00 2001
From: Felix Weinberger <fweinberger@anthropic.com>
Date: Thu, 16 Apr 2026 20:46:48 +0000
Subject: [PATCH 2/2] fix: use const+type alias so @deprecated survives dts
 bundling

---
 packages/middleware/node/src/index.ts | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/packages/middleware/node/src/index.ts b/packages/middleware/node/src/index.ts
index 6316b6c28..969852266 100644
--- a/packages/middleware/node/src/index.ts
+++ b/packages/middleware/node/src/index.ts
@@ -1,8 +1,10 @@
+import { NodeStreamableHTTPServerTransport } from './streamableHttp.js';
+
 export * from './streamableHttp.js';
 
-// v1-compat re-exports.
-export {
-    /** @deprecated Use {@linkcode NodeStreamableHTTPServerTransport}. */
-    NodeStreamableHTTPServerTransport as StreamableHTTPServerTransport
-} from './streamableHttp.js';
+/** @deprecated Use {@linkcode NodeStreamableHTTPServerTransport}. */
+export const StreamableHTTPServerTransport = NodeStreamableHTTPServerTransport;
+/** @deprecated Use {@linkcode NodeStreamableHTTPServerTransport}. */
+export type StreamableHTTPServerTransport = NodeStreamableHTTPServerTransport;
+
 export type { EventId, EventStore, StreamId } from '@modelcontextprotocol/server';