--- name: replica-design description: >- Rebuilds an app's design system for a clone: colour roles, type scale, spacing, radius, shadows and every component with its states, as design tokens plus component specs, with original assets instead of the target's logos, icons, illustrations or licensed fonts. Includes a WCAG contrast checker. Use when the user says "match the design", "rebuild the design system", "get the colours and fonts", "make it look like X", "design tokens for my clone", or after /replica-architect. title: replica-design canonical_url: https://skilld.dev/gh/jakeschincariol/replica-skill/replica-design last_updated: 2026-10-05T17:02:13.000Z --- > **Skill from skilld.dev.** Follow the user's requested action. > If the user asked to fork this Skill, follow the fork workflow below. Do not execute the Skill instructions while copying it. > Otherwise, follow the instructions below for this session. You do not need to install anything. > > Supporting files, fetch one when the Skill refers to it: [contrast.py](https://skilld.dev/api/skills-raw/jakeschincariol/replica-skill/replica-design/contrast.py), [tokens.json](https://skilld.dev/api/skills-raw/jakeschincariol/replica-skill/replica-design/tokens.json). > > If the user asked to install this Skill, run `npx skilld install jakeschincariol/replica-skill/replica-design`. Install writes the Skill files into the project, so every session loads them. > > ## Fork workflow > > A fork creates an editable local Skill with its original author and licence. The request authorizes copying and local installation. > 1. Check `./skills/replica-design`, the project lockfile, and selected Agent targets together. If the local directory or installed Skill exists, stop. Never overwrite an existing directory or Agent target. > 2. Read [source metadata](https://skilld.dev/api/v1/skills/jakeschincariol/replica-skill/replica-design) once. Use sourceUrl, sourceCommit, skillPath, sourceGone, and license. If the source is gone or its path is missing, stop. If license is null, read licence files at the source commit. > 3. Fetch only the source commit into a temporary Git repository. Do not clone full history. Derive repository_url from sourceUrl, including repository renames. If sourceCommit is absent, resolve the sourceUrl ref once. Set source_commit to that actual commit. Run these commands in one shell call: > > ```sh > git init --quiet "$temporary_dir" > git -C "$temporary_dir" fetch --quiet --depth=1 "$repository_url" "$source_commit" > git -C "$temporary_dir" checkout --quiet --detach FETCH_HEAD > ``` > > Read applicable licence declarations and notices at that commit. If copying is not permitted, report the restriction and stop. > 4. Inspect source entries together, then copy the directory containing skillPath into `./skills/replica-design`. Use the user's path if selected. Keep the original SKILL.md, relative links, scripts, binary assets, and executable modes. Exclude .git metadata. Reject symlinks and paths outside the Skill directory. After checking entries, use cp -a where available. A regular source directory needs no custom copy script. Do not save this page wrapper as SKILL.md. > Preserve author credit, notices, and applicable licence files from repository or parent directories. Add PROVENANCE.md with the Skill page, source URL, actual commit, original path, and licence. Retain any existing PROVENANCE.md and record new provenance separately. Batch source inspection, copying, and provenance work where practical. > 5. In the project root, run `skilld install ./skills/replica-design --mode copy --plain`. If skilld is unavailable, use `npx skilld install ./skills/replica-design --mode copy --plain`. This known command needs no help lookup. Install does not support --json. Use detected Agent targets, or add --agent for the targets the user selected. Install the local path, never the upstream selector. If installation fails, preserve the local copy and report the exact failure. > 6. Confirm the local lockfile source and installed Agent copies once. Report the local path, actual commit, and Agent targets. After edits, reinstall the same local path. Upstream updates must not replace it. Do not publish or push unless the user asks. # replica-design Reads `replica/recon.md` and the screenshots in `replica/screens/`. Writes `replica/design/tokens.json` (template in this folder), `tokens.css`, the Tailwind mapping, and `replica/design/components.md`. ```bash python3 contrast.py replica/design/tokens.json # every text pair, WCAG ratio ``` ## The rules What you rebuild is the **system**: the roles, the scale, the patterns, the way a form or a modal behaves. Those are not ownable, and users expect them. What you never take: - **Logos, icons, illustrations, photos, sounds.** Use an open icon set (Lucide, Phosphor, Heroicons, Tabler, all MIT or similar) and make or commission your own illustrations. Do not trace theirs. - **Licensed fonts.** If the original uses a paid or proprietary font, pick an open one with the same job: Inter, Geist, IBM Plex, Manrope, Source Serif. - **Their copy.** Every label and empty state gets written fresh. - **Their brand colour.** Record it as a role (`accent`), use a neutral placeholder now, and replica-brand gives you your own. The signature colour plus the signature layout is trade dress, and it changes before launch. ## Step 1: measure, do not guess From the screenshots (zoom in, use a colour picker on the user's machine): - **Colour roles**, not colours: bg, surface, border, border-input, text, text-muted, accent, on-accent, danger, success, warning. Count how many greys the app really uses. Usually 5 to 7. - **Type scale**: sizes, line heights, weights. Snap to a scale (12, 14, 16, 20, 28, 40 is common). Note the font category, not the font file. - **Spacing**: measure gaps between elements. It is almost always a 4 or 8 base. Write the scale. - **Radius, shadow, motion**: two or three of each. - **Layout**: max content width, grid, breakpoints, sidebar width, header height. ## Step 2: write the tokens Fill `tokens.json`. Keep the role names. replica-brand only changes values. Generate `tokens.css` as custom properties and map them into Tailwind's theme so components use `bg-surface text-muted`, never raw hex. Add a `pairs` list for every text and background combination the app uses, then: ```bash python3 contrast.py replica/design/tokens.json ``` AA is the floor: 4.5:1 for body text, 3:1 for large text and for input borders and focus rings. It exits 1 on a failure. Fix it in the tokens, not per component. ## Step 3: component specs For every component in the recon list, one block in `components.md`: ``` Button variants primary, secondary, ghost, danger sizes sm 32px, md 40px, lg 48px states default, hover, active, focus-visible (2px ring, accent), disabled, loading tokens bg accent, text on-accent, radius md, font sm/600 a11y real