Field notes from mature Ember codebases.
September 16, 2026 · FlameFold
Most mature Ember apps carry addons they own: in-repo addons, a private component library, a fork of something abandoned. Moving those to the v2 addon format is the step that makes Embroider and Vite work well, and it can be done one package at a time.
Read moreSeptember 15, 2026 · FlameFold
Most stalled Ember upgrades stall on addons, not on Ember. How to inventory what you depend on, sort it into delete/replace/vendor/own, and convert the ones worth keeping to the v2 format.
Read moreSeptember 14, 2026 · FlameFold
Ember ships its own types now and Glint type-checks templates. How to add TypeScript to a ten-year-old app file by file, what order to do it in, and when the honest answer is not yet.
Read moreSeptember 14, 2026 · FlameFold
Upgrades, Octane conversion, and migration off Ember all rest on a test suite you believe. How to move an old suite to modern QUnit and @ember/test-helpers, drain the flakes, and get CI back under ten minutes.
Read moreSeptember 14, 2026 · FlameFold
Vite is now the direction of travel for Ember builds. What actually changes under the hood, the Embroider stages you have to clear first, and how to tell whether your app is ready this quarter or next year.
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