dont transform to schema of already schema

package-lock.json

@@ -29,7 +29,7 @@
         "typescript": "^4.5.2"
       },
       "peerDependencies": {
-        "schemastery": "^3.3.2"
+        "schemastery": "^3.3.3"
       }
     },
     "node_modules/@babel/code-frame": {
@@ -1886,9 +1886,9 @@
       }
     },
     "node_modules/cosmokit": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/cosmokit/-/cosmokit-1.1.1.tgz",
-      "integrity": "sha512-+f8x9pFGIc7I6HTObS90dq2K5YsI4U3Me4l9OminU9woVtF9Sv3CAHb5vKbFZ93XpTFctAQ6qAVSGjkGvGI9iw==",
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/cosmokit/-/cosmokit-1.1.2.tgz",
+      "integrity": "sha512-cSNrcyxZ3GT+tjSlUzWIzMiK7Wndq1Nm/2tlRhT65RXltSIcH5zaHdmnz1TnIhLuOViaO9qfSdnRPzxNkxMv0g==",
       "peer": true
     },
     "node_modules/cross-spawn": {
@@ -4551,12 +4551,12 @@
       }
     },
     "node_modules/schemastery": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/schemastery/-/schemastery-3.3.2.tgz",
-      "integrity": "sha512-Z1C850OPtNEBs+D4QBPdC+Wu1t6Fn1BrOJILRHs2b+I/u61hUKP2vIPMAXFLvmmONnwqAW8ksPdCD6Zz9n8zhg==",
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/schemastery/-/schemastery-3.3.3.tgz",
+      "integrity": "sha512-DwRsse6C+Qao90P/Bz+4G3gmAjM3he/VgHk3TykmEWv3KFqvwmqEn61SF3BPaTPP0L77a5Kc6q4+KQvdN1bBqA==",
       "peer": true,
       "dependencies": {
-        "cosmokit": "^1.1.0"
+        "cosmokit": "^1.1.2"
       }
     },
     "node_modules/semver": {
@@ -6715,9 +6715,9 @@
       }
     },
     "cosmokit": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/cosmokit/-/cosmokit-1.1.1.tgz",
-      "integrity": "sha512-+f8x9pFGIc7I6HTObS90dq2K5YsI4U3Me4l9OminU9woVtF9Sv3CAHb5vKbFZ93XpTFctAQ6qAVSGjkGvGI9iw==",
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/cosmokit/-/cosmokit-1.1.2.tgz",
+      "integrity": "sha512-cSNrcyxZ3GT+tjSlUzWIzMiK7Wndq1Nm/2tlRhT65RXltSIcH5zaHdmnz1TnIhLuOViaO9qfSdnRPzxNkxMv0g==",
       "peer": true
     },
     "cross-spawn": {
@@ -8726,12 +8726,12 @@
       }
     },
     "schemastery": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/schemastery/-/schemastery-3.3.2.tgz",
-      "integrity": "sha512-Z1C850OPtNEBs+D4QBPdC+Wu1t6Fn1BrOJILRHs2b+I/u61hUKP2vIPMAXFLvmmONnwqAW8ksPdCD6Zz9n8zhg==",
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/schemastery/-/schemastery-3.3.3.tgz",
+      "integrity": "sha512-DwRsse6C+Qao90P/Bz+4G3gmAjM3he/VgHk3TykmEWv3KFqvwmqEn61SF3BPaTPP0L77a5Kc6q4+KQvdN1bBqA==",
       "peer": true,
       "requires": {
-        "cosmokit": "^1.1.0"
+        "cosmokit": "^1.1.2"
       }
     },
     "semver": {

package.json

@@ -59,6 +59,6 @@
     "testEnvironment": "node"
   },
   "peerDependencies": {
-    "schemastery": "^3.3.2"
+    "schemastery": "^3.3.3"
   }
 }

src/decorators/register.ts

@@ -217,6 +217,9 @@ function applySchemaForClass<T>(
 }
 
 export function SchemaClass<T>(originalClass: ClassType<T>) {
+  if (originalClass[kSchema]) {
+    return originalClass as ClassType<T> & Schema<Partial<T>, T>;
+  }
   const schema = schemaFromClass(originalClass);
   const newClass = function (...args: any[]): T {
     const instance = new originalClass(...args);