Before you had Figma libraries. Before you had design tokens. Before you had a component system or a spacing scale. Your brand had a feeling. Users knew it when they saw it, even if they couldn't name it. That feeling — the vibe — is the actual design system. Everything else is just its documentation.
This matters because teams often build the documentation before the feeling is truly understood. They start with colours and fonts and components, and then wonder why everything they build feels somehow generic. The artefacts are technically correct but the soul is missing.
The best design systems work backwards from the vibe. What does this brand feel like at its most distilled? Confident. Playful. Clinical. Human. Once you can answer that question in a single word — and actually mean it — everything else becomes easier. The spacing, the radius, the type scale, the motion curve. They should all be an expression of that one feeling.
Get the vibe right first. Then document it. The tokens will follow.