Started adding slash commands, doesn't work though

node_modules/qs/lib/stringify.js

@@ -1,5 +1,6 @@
 'use strict';
 
+var getSideChannel = require('side-channel');
 var utils = require('./utils');
 var formats = require('./formats');
 var has = Object.prototype.hasOwnProperty;
@@ -55,6 +56,8 @@ var isNonNullishPrimitive = function isNonNullishPrimitive(v) {
         || typeof v === 'bigint';
 };
 
+var sentinel = {};
+
 var stringify = function stringify(
     object,
     prefix,
@@ -69,9 +72,30 @@ var stringify = function stringify(
     format,
     formatter,
     encodeValuesOnly,
-    charset
+    charset,
+    sideChannel
 ) {
     var obj = object;
+
+    var tmpSc = sideChannel;
+    var step = 0;
+    var findFlag = false;
+    while ((tmpSc = tmpSc.get(sentinel)) !== void undefined && !findFlag) {
+        // Where object last appeared in the ref tree
+        var pos = tmpSc.get(object);
+        step += 1;
+        if (typeof pos !== 'undefined') {
+            if (pos === step) {
+                throw new RangeError('Cyclic object value');
+            } else {
+                findFlag = true; // Break while
+            }
+        }
+        if (typeof tmpSc.get(sentinel) === 'undefined') {
+            step = 0;
+        }
+    }
+
     if (typeof filter === 'function') {
         obj = filter(prefix, obj);
     } else if (obj instanceof Date) {
@@ -138,6 +162,9 @@ var stringify = function stringify(
             ? typeof generateArrayPrefix === 'function' ? generateArrayPrefix(prefix, key) : prefix
             : prefix + (allowDots ? '.' + key : '[' + key + ']');
 
+        sideChannel.set(object, step);
+        var valueSideChannel = getSideChannel();
+        valueSideChannel.set(sentinel, sideChannel);
         pushToArray(values, stringify(
             value,
             keyPrefix,
@@ -152,7 +179,8 @@ var stringify = function stringify(
             format,
             formatter,
             encodeValuesOnly,
-            charset
+            charset,
+            valueSideChannel
         ));
     }
 
@@ -246,6 +274,7 @@ module.exports = function (object, opts) {
         objKeys.sort(options.sort);
     }
 
+    var sideChannel = getSideChannel();
     for (var i = 0; i < objKeys.length; ++i) {
         var key = objKeys[i];
 
@@ -266,7 +295,8 @@ module.exports = function (object, opts) {
             options.format,
             options.formatter,
             options.encodeValuesOnly,
-            options.charset
+            options.charset,
+            sideChannel
         ));
     }