Setup spotlight project

.stoplight/custom-functions/oasOpSuccessResponse.js

@@ -0,0 +1,32 @@
+import { createRulesetFunction } from '@stoplight/spectral-core';
+import { oas3 } from '@stoplight/spectral-formats';
+
+export const oasOpSuccessResponse = createRulesetFunction(
+  {
+    input: {
+      type: 'object',
+    },
+    options: null,
+  },
+  (input, opts, context) => {
+    const isOAS3X = context.document.formats?.has(oas3) === true;
+
+    for (const response of Object.keys(input)) {
+      if (isOAS3X && (response === '2XX' || response === '3XX')) {
+        return;
+      }
+
+      if (Number(response) >= 200 && Number(response) < 400) {
+        return;
+      }
+    }
+
+    return [
+      {
+        message: 'Operation must define at least a single 2xx or 3xx response',
+      },
+    ];
+  },
+);
+
+export default oasOpSuccessResponse;