fix: remove any type and unused import in type guard

- Replace any with explicit type assertion in isCompletable()
- Remove unused CompletableDef import from mcp.ts

Author: felixweinberger

src/server/completable.ts

@@ -26,7 +26,7 @@ export type CompletableSchema<T extends ZodTypeAny> = T & { _def: T['_def'] & Co
  * Type guard to check if a schema has been wrapped with completion capabilities.
  */
 export function isCompletable<T extends ZodTypeAny>(schema: ZodTypeAny): schema is CompletableSchema<T> {
-    const defLike = (schema as any)._def;
+    const defLike = (schema as { _def?: { typeName?: unknown } })._def;
     return defLike?.typeName === McpZodTypeKind.Completable;
 }
 

src/server/mcp.ts

@@ -32,7 +32,7 @@ import {
     ToolAnnotations,
     LoggingMessageNotification
 } from '../types.js';
-import { CompletableDef, isCompletable } from './completable.js';
+import { isCompletable } from './completable.js';
 import { UriTemplate, Variables } from '../shared/uriTemplate.js';
 import { RequestHandlerExtra } from '../shared/protocol.js';
 import { Transport } from '../shared/transport.js';