discourse/app/assets/javascripts/admin/addon/routes/admin-plugins.js

import { action } from "@ember/object";
import Route from "@ember/routing/route";

export default class AdminPluginsRoute extends Route {
  model() {
    return this.store.findAll("plugin");
  }

  @action
  showSettings(plugin) {
    const controller = this.controllerFor("adminSiteSettings");
    this.transitionTo("adminSiteSettingsCategory", "plugins").then(() => {
      if (plugin) {
        // filterContent() is normally on a debounce from typing.
        // Because we don't want the default of "All Results", we tell it
        // to skip the next debounce.
        controller.set("filter", `plugin:${plugin.id}`);
        controller.set("_skipBounce", true);
        controller.filterContentNow("plugins");
      }
    });
  }
}