claude-code-system-prompts/system-prompts/skill-design-sync-slash-command.md
2026-06-03 16:00:08 -06:00

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name: 'Skill: /design-sync slash command'
description: Skill definition for syncing a React design system to claude.ai/design, including project selection, source-shape detection, converter configuration, validation, upload planning, and self-check behavior
ccVersion: 2.1.162
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---
name: design-sync
description: Push a React design system to claude.ai/design. This runs a converter that bundles the real component code (from Storybook or a bare package) and uploads it. Use when the user runs /design-sync or says "sync my design system to Claude Design".
---
# Sync a design system to claude.ai/design
You have a `DesignSync` tool that reads and writes the user's claude.ai/design projects. This skill turns a React design-system repo into the format claude.ai/design consumes, then uploads it.
**The goal — what a design-system project looks like on claude.ai/design:**
- One `_ds_bundle.js` at the project root that assigns every component to `window.<globalName>.*`, so the design agent can build with the real code.
- One `styles.css` that `@import`s the tokens, component CSS, and fonts.
- Per component, `components/<group>/<Name>/`: a `<Name>.d.ts` whose `<Name>Props` interface is the component's API contract, a `<Name>.prompt.md` with usage examples, and a `<Name>.html` preview card.
The converter builds all of that deterministically from the repo's own `dist/`. Storybook is the happy path (richest previews); any built npm package also works. **Core principle: ship what the customer already built** — the bundle is their compiled `dist/`, not a reimplementation.
## 1. Pick the target project
If `DesignSync` isn't already in your tool list, load it via `ToolSearch(query: "select:DesignSync")` first. Then call `DesignSync(list_projects)`. One or several results → `AskUserQuestion` listing each, plus a final "Create a new project called '<name>'" option (name from the package/design-system); if they pick it, `DesignSync(create_project)`. None → offer `create_project` directly. If the user gave a UUID, `DesignSync(get_project)` and check `type` is `PROJECT_TYPE_DESIGN_SYSTEM`.
## 2. Explore, then write config
The workflow is **explore the repo → write `design-sync.config.json` → run the converter deterministically from it**. The converter's discovery is heuristic-based; each heuristic has a config override (`grep ASSUMPTION lib/*.mjs` lists them) so repos that don't match the defaults write config, not code. Edit `lib/*.mjs` only as a last resort (§Troubleshooting).
1. **Faithful install with the repo's own package manager.** Use the repo's pinned node version (`.nvmrc` / `engines.node`), then detect via lockfile: `yarn.lock``yarn install --immutable`; `pnpm-lock.yaml``pnpm i --frozen-lockfile`; `bun.lockb`/`bun.lock``bun install --frozen-lockfile`; `package-lock.json``npm ci`.
2. **Determine the source shape.** If `design-sync.config.json` already exists and has a `"shape"` field, use that. Otherwise search for `.storybook/` and `*.stories.*`:
- Found a `.storybook/` dir → `shape = 'storybook'`. Found several → `AskUserQuestion` which one is the design system's; that dir becomes `storybookConfigDir`.
- Found `*.stories.*` files but no `.storybook/` dir in the target → `AskUserQuestion`: "Found story files but no `.storybook/` here — is there a Storybook config elsewhere in this repo (e.g. `apps/storybook/.storybook` in a monorepo)?" If they point at one → `shape = 'storybook'`, record that path as `storybookConfigDir`. If they say no → `shape = 'package'`.
- No `.storybook/` and no `*.stories.*``AskUserQuestion` whether a Storybook exists at all. If they point at one, record it as `storybookConfigDir` and `shape = 'storybook'`. If no, `shape = 'package'`.
Then `Read` `<skill-base-dir>/storybook/SKILL.md` or `<skill-base-dir>/non-storybook/SKILL.md` and follow it from there — each is self-contained. Record `"shape"` (and `"storybookConfigDir"` when set) in `design-sync.config.json` when you write it so re-sync skips detection. The converter scripts are shared across shapes and live at `<skill-base-dir>/package-build.mjs`, `package-validate.mjs`, and `lib/`.