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YoussefandClaude Opus 4.7
b5b21ceebf
The skill now knows how to add hero visuals — demo videos, mockups, illustrations, animated loops, abstract backgrounds, photography — and when not to. The default answer remains typography-only; enrichment has to earn its place. Three new references. hero-enrichment.md is the decision file: an enrichment hierarchy (typography → custom CSS art → hand-built SVG → generated illustration → library + customise → Lottie last resort), a brief-domain decision protocol (SaaS → demo video, bakery → custom illustration, manifesto → none), eight enrichment archetypes (E1 clipped-edge demo video with the full Linear/Vercel recipe, E3/E4 mockups, E5 custom centerpiece, E6 custom animated loop, E7 subtle gradient + grain background, E8 photography), and an eight-question quality bar. custom-craft.md is the how-to-build-it file: pure CSS art (Lynn Fisher / Diana Smith canon — clip-path, conic-gradient, @property, mask, blend-mode), hand-built SVG with the Figma → SVGOMG pipeline and declarative animation via CSS keyframes / @property / animation-timeline / View Transitions, JS-driven motion with the Motion / GSAP / AutoAnimate decision rule, Three.js when the 3D is the hero value not when it isn't, generated stills via Nanobanana 2 and Recraft V4 with discipline (always post-process, reference images, stamp the model), and Lottie explicitly demoted to last resort with the rule "never for what CSS can do". A bakery worked example shows all of it. assets.md is the sourcing canon: Lucide / Phosphor / Heroicons (icons, never mix sets), Simple Icons / SVGL (logos), Storyset / Humaaans / unDraw (library illustration with mandatory customisation), Browserframe / Ray.so / Cleanmock (mockups), Mixkit / Coverr / Pexels (video with the AV1 → VP9 → H.264 codec chain and fetchpriority="high" rule), Unsplash / Nappy / Shotstash (photography), CSS gradients + fffuel.co (abstracts, no aurora), LottieFiles / Rive (last resort). Three new hero archetypes in component-cookbook.md (H7 clipped video, H8 mockup split, H9 custom illustration centerpiece) with within- archetype variation knobs added to the table. Eight new tells in anti-patterns.md: aurora-blob background, floating- orb decoration, sound-on autoplay, lazy-loaded LCP, mismatched icon sets, AI-illustration look, Lottie shortcut, Three.js for a still object. Slop test 29 → 33 with four hero-enrichment gates: video autoplay discipline, abstract-background restraint, single-icon-library check, and the Lottie-shortcut catch. SKILL.md design flow gains Step 4 "Decide on hero enrichment" between the macrostructure pick and the build, with the enrichment hierarchy as a non-negotiable. Frontmatter version bumped to 0.4.0. New refs listed as load-on-demand. Sixteenth theme: Quiet. Restraint as the design — system fonts (no web fonts loaded for Quiet), barely-warm near-white paper (oklch 99.5% 0.002 90, deliberately not pure #FFFFFF), barely-cool near-black ink, accent equal to ink (no chromatic accent at all), average-sized headlines (clamp 1.75–2.75rem, much smaller than the 3.5–8rem of every other theme), generous whitespace (section-gap 12rem). Hero archetype: Letter. Footer: Inline. No reveals — Quiet is intentionally still. A deliberate exception to Hallmark's "pair distinctive display + body" rule, which the theme tokens block calls out explicitly. The user spec was "the most simple you can make it"; Quiet is. Landing page demonstration of E1: Pastel theme now renders the clipped-edge dashboard mockup as its hero instead of Letter. The mockup is hand-built CSS art — no real video, no images. Browser chrome (three dots, hallmark.studio URL), a sidebar with the active item in indigo accent, a 3-card grid showing a stat, a sparkline, and a rows card. Tilted -0.4° for life. Extends ~12vw past the viewport right edge. Collapses to stacked at < 60rem. The implementation IS the custom-craft principle: built, not picked. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Hallmark
A design skill for AI coding assistants. Makes the UIs they generate look made, not generated.
Powered by Together AI.
What it is
A single, opinionated skill that gives Claude Code, Cursor, and Codex a firm rule-set for typography, colour, layout, motion, microinteractions, copy, responsive behaviour, and structural variety. It refuses to emit the on-distribution defaults every LLM was trained into.
The differentiator: Hallmark insists on structural variety, not just visual variety. Two pages from two briefs should not share the same hero → 3-feature → CTA → footer rhythm. They should feel like different sites.
Five verbs
| Verb | What it does |
|---|---|
| (default) | Build new UI. Asks for audience + use case + tone (skippable — the skill states what it inferred either way), picks a macrostructure, applies the rule-set, runs the slop test before handing back. |
hallmark audit <target> |
Score existing code against the named anti-patterns + structural sameness. Punch list, no edits. |
hallmark refine <target> |
Polish in place. Smallest possible diff. Preserves structure. |
hallmark redesign <target> [--mood <name>] |
Throw out the structure, keep copy + IA + brand, rebuild with a deliberately different fingerprint. |
hallmark study <screenshot> |
Extract the DNA from a design the user admires — macrostructure, archetypes, type-pairing role, colour anchor — and produce a diagnosis report. Optionally rebuild the user's content using the extracted DNA. Refuses paid templates and competitor pages. Names font roles, never font IDs. Never copies pixels. |
What's inside
SKILL.md— the routing file. Design flow, slop test (33 questions), output contract.references/— sixteen short, opinionated rule files: typography, colour, layout, motion, microinteractions, interaction-and-states, responsive, copy, anti-patterns, the 21 named macrostructures, the 36 component archetypes with variation knobs, the 6 primitive structure axes, the vision-extraction protocol forstudy, and three new files for hero work —hero-enrichment.md(when to add visuals to a hero, plus eight enrichment archetypes),custom-craft.md(how to hand-build CSS art, SVG, declarative animation, JS-driven motion, with Lottie demoted to last resort), andassets.md(sourcing canon for icons, brand logos, generated illustration via Nanobanana / Recraft, library illustration, app mockups, hero video, photography, abstract backgrounds).site/— a self-demonstrating landing page. Hand-written HTML + CSS + ES module, no framework, no build step. Sixteen themes — Specimen, Newsprint, Atelier, Garden, Salon, Linen, Almanac, Midnight, Terminal, Brutal, Manifesto, Sport, Studio, Pastel, Riso, Quiet — that swap not just colour and typography but the page's hero archetype and footer archetype. Switching themes literally rebuilds the page.ROADMAP.md— Tier 1, 2, 3 work plus an explicit "things to not do" list.
Install
npx skills add hallmark
Or copy skill/ into ~/.claude/skills/hallmark/ (Claude Code) or .cursor/rules/hallmark.mdc (Cursor — body of SKILL.md, no frontmatter).
To preview the landing page:
cd site && python3 -m http.server 4173 # → http://localhost:4173
Press T to cycle themes, R for random, ?theme=studio for a shareable link.
What's distinct
- One skill, five verbs. Not eighteen commands.
- Tone is a first-class decision. "Clean and modern" is rejected. Pick an extreme.
- Macrostructures over axes. Pick one of 21 named whole-page shapes wholesale; the macrostructure stamp lives in the CSS comment, so the next Hallmark run picks something different.
- Within-archetype variation. Two Bento Grids should not be twins; each archetype has 2–3 picked-per-output knobs.
- Microinteractions as discipline. Silent success over celebratory toasts. Optimistic update + Undo over confirm dialogs. Hover delay 800 ms, focus delay 0 ms.
- A 33-gate slop test runs before every output. One yes fails the build.
- Hero enrichment is opt-in, not a default. A typographic-only hero is always acceptable. When enrichment is right, the skill picks from a six-tier hierarchy: typography only → custom-built CSS art → hand-built SVG → generated illustration (Nanobanana / Recraft) → library + customise → Lottie (last resort).
studyextracts DNA, not pixels. Vision-extraction with refusal heuristics, type-role vocabulary (no font ID guessing), and a confirmation step before any code.
Credits
Built on the open work of:
- Paul Bakaus' impeccable — the named-tells canon
- tw93's kami — the slop-test concept and 20-question scoring
- Leonxlnx's taste-skill — taste vocabulary and the audit verb
- Anthropic's frontend-design and canvas-design skills — the design-context-gate pattern
- Google Stitch's DESIGN.md — single-source design docs
- Marie Claire Dean's 63 design skills for Claude — coverage map
- Steve Barclay's PencilPlaybook — the design-language playbook format
- The Slopless tactile-rebellion canon — the 2026 anti-AI-perfect movement (informed Studio, Pastel, Riso)
- Anthropic's Skill Engineering writeup — file budgets, load-on-demand patterns, frontmatter shape
Where rules overlapped, Hallmark adopted; where they diverged, Hallmark picked.
Licence
MIT. Use it, fork it, ship it.