Update CompletionComplete to return an empty array instead of throwing an exception when primitive does not support completion

Author: pushpak1300

src/Server/Methods/CompletionComplete.php

@@ -8,6 +8,7 @@
 use Illuminate\Support\Arr;
 use InvalidArgumentException;
 use Laravel\Mcp\Server;
+use Laravel\Mcp\Server\Completions\CompletionResponse;
 use Laravel\Mcp\Server\Contracts\HasUriTemplate;
 use Laravel\Mcp\Server\Contracts\Method;
 use Laravel\Mcp\Server\Contracts\SupportsCompletion;
@@ -53,11 +54,11 @@ public function handle(JsonRpcRequest $request, ServerContext $context): JsonRpc
         }
 
         if (! $primitive instanceof SupportsCompletion) {
-            throw new JsonRpcException(
-                'The referenced primitive does not support completion.',
-                -32601,
-                $request->id,
-            );
+            $result = CompletionResponse::empty();
+
+            return JsonRpcResponse::result($request->id, [
+                'completion' => $result->toArray(),
+            ]);
         }
 
         $argumentName = Arr::get($argument, 'name');

tests/Unit/Methods/CompletionCompleteTest.php

@@ -226,7 +226,7 @@ public function handle(\Laravel\Mcp\Request $request): Response
     $method->handle($request, $context);
 })->throws(JsonRpcException::class, 'Resource [file://non-existent] not found');
 
-it('throws exception when primitive does not support completion', function (): void {
+it('return empty array when primitive does not support completion', function (): void {
     $server = new class(new FakeTransporter) extends Server
     {
         protected string $name = 'Test';
@@ -244,8 +244,16 @@ public function handle(\Laravel\Mcp\Request $request): Response
 
     $context = $server->createContext();
 
-    $method->handle($request, $context);
-})->throws(JsonRpcException::class, 'does not support completion');
+    $response = $method->handle($request, $context);
+
+    expect($response->toArray())
+        ->toHaveKey('result')
+        ->and($response->toArray()['result'])
+        ->toHaveKey('completion')
+        ->and($response->toArray()['result']['completion']['values'])
+        ->toBe([]);
+
+});
 
 it('completes for prompt', function (): void {
     $method = new CompletionComplete;