Cedar is REI's open-source design system for its outdoor retail digital products, built on Vue components, design tokens, and CSS styles, installable via npm and GitHub.
It includes a documented Designer Onboarding path as a distinct section separate from the general docs, a concrete example of treating "how a new designer learns this system" as its own deliverable rather than assuming osmosis.
Developers on a Vue-based e-commerce or retail project who want a mature, brand-consistent component set, or design leads studying explicit onboarding documentation as a pattern.
It's built primarily for REI's own products but is genuinely open source on GitHub and npm, so components are installable directly outside REI as well.
REI's design system, aligned to its brand's visual language.