0:00 – Letting your yes be yes, following through on your commitments, and paying attention to opportunity cost6:40 – When Ember releases actually become LTS versions9:13 – Why we need "test apps" when developing Addons16:50 – How to use newer syntax when authoring Addons that support older Ember versions22:07 – How angle brackets change our component implementations31:46 – How to make the APIs of our domain components more portable38:45 – How to reuse code that has implicit data dependencies, and the Halting problemMirage's example test appsEmber CLI Tailwind's example test appsNested Angle Bracket videoEmber Collapsible Panel