Setup Design Handoff

Make the design-study → production-component handoff survivable in this project. The system rests on one idea: the contract is a set of named design decisions (tokens + component names). Studies, apps, and every framework rendering of the design speak only in those names. This skill installs the three mechanical pieces that hold the contract: the token layer, the study scaffolding, and the enforcement check. The prose rules (design-system.md, design-studies.md, ui-components.md) come from setup-rules — run that first if the repo has no rules/ yet.

Golden rule: adapt, don't dump. Every path, glob, and command installed must resolve to something real in this repo.

1. Detect the target stack

Look before asking: tailwindcss in package.json? tamagui / react-native? Both (a monorepo with web + native workspaces)? Confirm with the user, then pick the token-layer shape: