AI Design Skills

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.

Marketing Skills is a collection of Markdown-based skills for AI coding agents, built by Corey Haines. It provides specialized workflows for conversion optimization, copywriting, SEO, analytics, advertising, growth engineering, sales, and related marketing tasks, and supports Claude Code, OpenAI Codex, Cursor, Windsurf, and agents implementing the Agent Skills specification. The skills share context and cross-reference one another. The product-marketing skill serves as the foundation, with other skills consulting it for product, audience, and positioning information before handling tasks such as CRO, copywriting, SEO audits, analytics setup, email flows, pricing, or sales enablement. Skills can be installed individually or as a collection through the Skills CLI, Claude Code's plugin system, a repository clone or submodule, or SkillKit. The repository is built and maintained through community contributions, with issues and pull requests welcomed. It is free and MIT-licensed.

Agent Skills is an open-source collection of engineering workflows for AI coding agents, developed by Addy Osmani. It packages senior-engineering practices into skills covering the development lifecycle: defining specifications, planning, incremental implementation, testing and debugging, constraints, code review, web-performance auditing, code simplification, and shipping. Slash commands such as /spec, /plan, /build, /test, /review, and /ship activate the corresponding workflows, while skills can also activate automatically based on the work being performed. The /build workflow can generate a plan and implement its tasks in an approved pass, while retaining test-driven verification, individual commits, and pauses for failures or risky steps. It can be installed with the skills CLI or integrated into supported coding agents including Claude Code, Cursor, Codex, Copilot, and Cline.

An agent-facing collection of design and engineering skills by Emil Kowalski for building and reviewing user interfaces. Its guidance covers animation curves, durations, properties, gestures, haptics, screen transitions, motion placement, borders, shadows, typography, Apple interface principles distilled from WWDC talks, UI-library selection, modern Swift, prototyping, and product-interface details. The skills can create animations from scratch, review animations against defined rules, audit a codebase and produce prioritized implementation plans, identify worthwhile opportunities for motion while flagging what should not be animated, and build multiple UI variants navigated through a switcher. A React Native and Expo skill covers gestures, sheets, haptics, screen transitions, and keeping motion off the JavaScript thread; other skills guide use of the Sonner toast library and library selection. The collection is installed with `npx skills@latest add emilkowalski/skills` and is based on Kowalski’s stated experience at Vercel and Linear.

Agent Skills is a curated skill registry and npm-based CLI for extending AI coding agents such as Claude Code, Cursor, Copilot, and Antigravity with packaged instructions, templates, and reference files. The CLI fetches a catalog, lets users search and select skills, caches downloads locally, and installs them to selected agents by copying or symlinking them at global or project scope; it also supports updating, removing, auditing, and managing cached skills. The repository describes the catalog as an open-source, human-curated library with CI static analysis, content hashing, lockfiles, path isolation, symlink guards, sanitization, audit logging, and Snyk Agent Scan checks. It also includes an MCP server that exposes progressive-disclosure tools for listing, searching, reading, and fetching skill files. The CLI source is MIT-licensed; maintainer-authored skills are generally CC BY 4.0, while third-party skills retain their own licenses.