frontend-design
Aesthetic direction for designs outside an existing brand system
git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks /tmp/frontend-design && cp -r /tmp/frontend-design/Anthropic/claude-design/skills/frontend-design ~/.claude/skills/frontend-designSKILL.md
# Frontend design Use this guidance when designing frontend/UI work that is NOT governed by an existing brand or design system. Create distinctive HTML with exceptional attention to aesthetic details and creative choices. ### Design Thinking Before coding, understand the context and commit to a BOLD aesthetic direction: - **Purpose**: What problem does this interface solve? Who uses it? - **Tone**: Pick an extreme: brutally minimal, maximalist chaos, retro-futuristic, organic/natural, luxury/refined, playful/toy-like, editorial/magazine, brutalist/raw, art deco/geometric, soft/pastel, industrial/utilitarian, etc. Use these for inspiration but design one that is true to the aesthetic direction. - **Differentiation**: What makes this UNFORGETTABLE? What's the one thing someone will remember? Choose a clear conceptual direction and execute it with precision. Bold maximalism and refined minimalism both work — the key is intentionality, not intensity. ### Aesthetics Guidelines - **Typography**: Choose fonts that are beautiful, unique, and interesting. Avoid generic fonts like Arial and Inter; opt for distinctive, characterful choices. Pair a distinctive display font with a refined body font. - **Color & Theme**: Commit to a cohesive aesthetic. Use CSS variables for consistency. Dominant colors with sharp accents outperform timid, evenly-distributed palettes. - **Motion**: Use animations for effects and micro-interactions. Prioritize CSS-only solutions for HTML. Focus on high-impact moments: one well-orchestrated page load with staggered reveals creates more delight than scattered micro-interactions. - **Spatial Composition**: Unexpected layouts. Asymmetry. Overlap. Diagonal flow. Grid-breaking elements. Generous negative space OR controlled density. - **Backgrounds & Visual Details**: Create atmosphere and depth rather than defaulting to solid colors. Gradient meshes, noise textures, geometric patterns, layered transparencies, dramatic shadows, decorative borders, grain overlays. Vary between light and dark themes, different fonts, different aesthetics. NEVER converge on the same choices across generations. Match implementation complexity to the aesthetic vision. Maximalist designs need elaborate animations and effects. Minimalist designs need restraint, precision, and careful attention to spacing and subtle details.
Deep research harness — fan-out web searches, fetch sources, adversarially verify claims, synthesize a cited report.
Author or improve the run-<unit> skill - a per-project skill that tells agents how to build, launch, and drive this project's app. Use when the user asks to set up the project, get it running, write run instructions, or verify build/run steps work from a clean environment.
Runtime capabilities a published Artifact page can be granted — behavior static HTML cannot provide on its own, such as the page reading live or connected data, remembering what people do on it (a poll, a sign-up sheet, a checklist, a document edited in place — it saves new versions of itself), keeping state shared across viewers, knowing who is viewing, asking Claude a question of its own, storing files people add, or handing the viewer a file to save. Serves this user's live capability roster and the typed call definitions. Load it whenever the user asks for an artifact needing any such runtime behavior.
Design guidance and fundamentals for Artifacts.
Diagramming know-how for Artifacts - when a picture earns its place, how to draw one that shows the real mechanism, and the inline-SVG mechanics that keep it legible in both themes.
Research and plan a large-scale change, then execute it in parallel across 5–30 isolated worktree agents that each open a PR.
Automates your Chrome browser to interact with web pages - clicking elements, filling forms, capturing screenshots, reading console logs, and navigating sites. Opens pages in new tabs within your existing Chrome session. Requires site-level permissions before executing (configured in the extension).
Review the current diff, or a PR number/branch/path target, for correctness bugs and reuse/simplification/efficiency cleanups at the given effort level (low/medium: fewer, high-confidence findings; high→max: broader coverage, may include uncertain findings; ultra: deep multi-agent review in the cloud); with no level given, it reuses the level you typed last. Pass --comment to post findings as inline PR comments, or --fix to apply the findings to the working tree after the review. For ultra on a GitHub.com PR target, --post asks to post the finished review’s findings to the PR as a single comment from the user’s GitHub account (not a review; the launch dialog still confirms in interactive sessions, while non-interactive mode posts on the flag alone) and --no-post hides that option.