Impeccable

AI Design Skills is an MIT-licensed collection of Markdown design skills for AI coding tools such as Claude Code, Cursor, Codex, Windsurf, and Cline. Its skills provide coding agents with guidance for landing-page strategy, page structure, conversion copy, typography, spacing, visual systems, border radius, and motion. Each skill is stored as a self-contained folder with a SKILL.md file that can be copied into an agent's project-rules directory, added to a system prompt, or uploaded to a Claude.ai project. The repository currently documents a landing-page-design skill that asks intake questions, builds the page structure and copy, and defines the visual system; its design values are grouped in an editable section so users can change fonts, colors, spacing, and motion. The collection can be forked and used, modified, distributed, or used in commercial work under the MIT license.

Anti Slop is an open-source set of rules and agent skills for AI coding agents that filters generic AI-generated user interfaces, copy, and code without prescribing colors, fonts, layouts, or other visual styles. Its core contains 38 mandatory rules across Hard Gate, Purpose-Gate, and Quality Locks tiers; a Liveliness Toolkit with ENERGY, RHYTHM, and MOTION controls; a Design Read; and a mandatory four-part PASS/FAIL Delivery Gate. Task-specific skills are organized as separate SKILL.md folders and loaded additively, while a project’s DESIGN.md supplies the visual direction. The repository provides installation through the npx antislop-ai picker, the skills.sh-compatible npx skills add command, or a Claude Code marketplace plugin, with support for agents including Claude Code, Codex, Antigravity, OpenCode, Cursor, Gemini CLI, and Hermes.

UI Skills is a command-line tool and collection of skills for design engineers working with AI coding agents. Its registry can be browsed from a terminal with commands such as `npx ui-skills start`, `categories`, and `list --category motion`, while individual skills such as `baseline-ui` can be fetched with `get`. It also exposes the registry to agents over the Model Context Protocol through `list_skills` and `get_skill`, and provides a playbook of distilled design-engineering lessons.

Hallmark is an open-source design skill for Claude Code, Cursor, and Codex that applies anti-AI-slop rules to generated interfaces. It selects a macrostructure and one of twenty-one themes for a brief, applies its design rule set, runs fifty-seven anti-pattern gates and a pre-emit self-critique, and returns self-contained HTML and CSS. Its four operations build new UI, audit existing code without editing it, redesign an interface while retaining its copy, information architecture, and brand, or study a screenshot or URL to extract macrostructure, type pairing, and a color anchor; the study operation can also emit a portable design.md file. Custom briefs can receive a made-to-measure palette, typography, and layout rather than a catalog theme. Hallmark is made by Together AI and distributed under the MIT license.

An MIT-licensed Claude Code skill that applies concrete design rules from Refactoring UI by Adam Wathan and Steve Schoger when building or reviewing interfaces. It selects spacing, typography, color, shadow, and radius values from fixed scales; creates hierarchy through font weight and color rather than relying on larger text; and translates subjective issues such as an interface looking "off" into specific mechanical fixes. The repository includes a SKILL.md procedure, references for palette construction, diagnosis, depth, typefaces, grids, and images, plus a contrast-verified starter tokens.css file. Claude Code can load it as a personal or project skill, and it does not include the book's text or images.