some easy stuff to get started (untested)

Author: Exhabition

additions/Member/hoistColor.js

@@ -0,0 +1,12 @@
+const { addPrototype } = require("erisify/helper/prototype");
+
+/**
+ * @param {import("eris")} Eris
+ */
+module.exports.init = (Eris) => {
+    addPrototype(Eris, "Member", function hoistColor() {
+        const hoistedRole = this.roles.find(item => item.hoist);
+
+        return hoistedRole?.color || "#FFFF";
+    }, true);
+};

additions/Member/tag.js

@@ -0,0 +1,10 @@
+const { addPrototype } = require("erisify/helper/prototype");
+
+/**
+ * @param {import("eris")} Eris
+ */
+module.exports.init = (Eris) => {
+    addPrototype(Eris, "Member", function tag() {
+        return `${this.username}#${this.discriminator}`;
+    }, true);
+};

additions/Role/higherThan.js

@@ -0,0 +1,13 @@
+const { addPrototype } = require("erisify/helper/prototype");
+
+/**
+ * @param {import("eris")} Eris
+ */
+module.exports.init = (Eris) => {
+    addPrototype(Eris, "Role", function higherThan(roleTwo) {
+        // If both roles have the same position then use id's (the lower the id the older it is, so lets return true if it's older)
+        if (this.position === roleTwo.position) return this.id < roleTwo.id;
+
+        return this.position > roleTwo.position;
+    }, true);
+};

additions/Role/isHighest.js

@@ -0,0 +1,12 @@
+const { addPrototype } = require("erisify/helper/prototype");
+
+/**
+ * @param {import("eris")} Eris
+ */
+module.exports.init = (Eris) => {
+    addPrototype(Eris, "Role", function isHighest() {
+        const highestRole = Math.max.apply(Math, array.map(item => item.position));
+
+        return highestRole.id === this.id;
+    }, true);
+};

additions/User/tag.js

@@ -4,7 +4,7 @@ const { addPrototype } = require("erisify/helper/prototype");
  * @param {import("eris")} Eris
  */
 module.exports.init = (Eris) => {
-    addPrototype(Eris, "User", function guild() {
+    addPrototype(Eris, "User", function tag() {
         return `${this.username}#${this.discriminator}`;
     }, true);
 };