* [x] [RFC](https://github.com/emberjs/rfcs/pull/756) * [x] [Update](https://github.com/emberjs/rfcs/pull/788) @chancancode * [x] glimmer-vm * [x] https://github.com/glimmerjs/glimmer-vm/pull/1348 * [x] https://github.com/glimmerjs/glimmer-vm/pull/1384 * [x] https://github.com/glimmerjs/glimmer-vm/pull/1389) * [x] ember.js (https://github.com/emberjs/ember.js/pull/20052) * [x] enable feature * [x] [update guides](https://github.com/emberjs/rfcs/blob/master/text/0756-helper-default-manager.md#how-we-teach-this) (https://github.com/ember-learn/guides-source/pull/1924) * [x] adopt polyfill into [ember-polyfills](https://github.com/ember-polyfills) * [x] update polyfill to be inert as of v4.x? (TBD) * [x] coordinate with TypeScript/Glint team cc @chriskrycho @dfreeman @jamescdavis
DEFAULT_HELPER_MANAGERfeature flag glimmerjs/glimmer-vm#1384