{"action":"created","comment":{"url":"https://api.github.com/repos/emberjs/rfcs/pulls/comments/240805357","pull_request_review_id":183921775,"id":240805357,"node_id":"MDI0OlB1bGxSZXF1ZXN0UmV2aWV3Q29tbWVudDI0MDgwNTM1Nw==","diff_hunk":"@@ -0,0 +1,1029 @@\n+- Start Date: 2018-12-05\n+- RFC PR: (leave this empty)\n+- Ember Issue: (leave this empty)\n+- Authors: Tom Dale, Chris Garrett, Chad Hietala, Yehuda Katz\n+\n+# Tracked Properties\n+\n+## Summary\n+\n+Tracked properties introduce a simpler and more ergonomic system for tracking\n+state change in Ember applications. By taking advantage of new JavaScript\n+features, tracked properties allow Ember to reduce its API surface area while\n+producing code that is both more intuitive and less error-prone.\n+\n+This simple example shows a `Person` class with three tracked properties:\n+\n+```js\n+export default class Person {\n+  @tracked firstName = 'Chad';\n+  @tracked lastName = 'Hietala';\n+\n+  @tracked get fullName() {\n+    return `${this.firstName} ${this.lastName}`;\n+  }\n+}\n+```\n+\n+### A Note on Decorator Stability\n+\n+Decorators are important to adopting native class syntax. They are a\n+formalization of the patterns we have been using as a community for years,\n+and it will not be possible to use native classes ergonomically without them\n+unless a number of major concepts (computed properties, injections, actions) are\n+rethought. That said, decorators are still a [_stage 2_\n+proposal](https://tc39.github.io/process-document/) in TC39, which means that\n+while they are fully defined as a spec, they are not yet considered a candidate\n+for inclusion in the language, and may have incremental changes that could be\n+breaking if/when moved to stage 3. As such, merging support for them now would\n+pose some risk.","path":"text/0000-tracked-properties.md","position":39,"original_position":39,"commit_id":"39a163311e811e8b61f18d13d250f19e385b16e2","original_commit_id":"be351b059f08ac0fe709bc7697860d5064717a7f","user":{"login":"mike-north","id":558005,"node_id":"MDQ6VXNlcjU1ODAwNQ==","avatar_url":"https://avatars1.githubusercontent.com/u/558005?v=4","gravatar_id":"","url":"https://api.github.com/users/mike-north","html_url":"https://github.com/mike-north","followers_url":"https://api.github.com/users/mike-north/followers","following_url":"https://api.github.com/users/mike-north/following{/other_user}","gists_url":"https://api.github.com/users/mike-north/gists{/gist_id}","starred_url":"https://api.github.com/users/mike-north/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mike-north/subscriptions","organizations_url":"https://api.github.com/users/mike-north/orgs","repos_url":"https://api.github.com/users/mike-north/repos","events_url":"https://api.github.com/users/mike-north/events{/privacy}","received_events_url":"https://api.github.com/users/mike-north/received_events","type":"User","site_admin":false},"body":"Sounds like the adoption of either RFC involves taking on the decorator-related hedging we've discussed in person. This should be called out explicitly (i.e., maybe even an \"Accepting this RFC includes....\" 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