fix: use same-package import in protocol.examples.ts

The cross-package import to server/src failed in CI because core
cannot depend on server. Use Protocol from the same package instead.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: tizmagik

packages/core/src/shared/protocol.examples.ts

@@ -7,15 +7,15 @@
  * @module
  */
 
-import type { Server } from '../../../../server/src/server/server.js';
+import type { BaseContext, Protocol } from './protocol.js';
 
 /**
  * Example: Wrapping an existing request handler with getRequestHandler.
  */
-function getRequestHandler_wrapping(server: Server) {
+function getRequestHandler_wrapping(protocol: Protocol<BaseContext>) {
     //#region getRequestHandler_wrapping
-    const original = server.getRequestHandler('tools/list');
-    server.setRequestHandler('tools/list', async (request, ctx) => {
+    const original = protocol.getRequestHandler('tools/list');
+    protocol.setRequestHandler('tools/list', async (request, ctx) => {
         const result = await original!(request, ctx);
         // Transform the result before returning
         return result;

packages/core/src/shared/protocol.ts

@@ -1514,8 +1514,8 @@ export abstract class Protocol<ContextT extends BaseContext> {
      * This can be used to wrap an existing handler with additional logic:
      *
      * ```ts source="./protocol.examples.ts#getRequestHandler_wrapping"
-     * const original = server.getRequestHandler('tools/list');
-     * server.setRequestHandler('tools/list', async (request, ctx) => {
+     * const original = protocol.getRequestHandler('tools/list');
+     * protocol.setRequestHandler('tools/list', async (request, ctx) => {
      *     const result = await original!(request, ctx);
      *     // Transform the result before returning
      *     return result;