Agent Skills

io.github.sickn33/antigravity-awesome-skills/api-design-principles

Master REST and GraphQL API design principles to build intuitive, scalable, and maintainable APIs that delight developers and stand the test of time.

io.github.sickn33/antigravity-awesome-skills/api-testing-observability-api-mock

You are an API mocking expert specializing in realistic mock services for development, testing, and demos. Design mocks that simulate real API behavior and enable parallel development.

io.github.sickn33/antigravity-awesome-skills/api-security-best-practices

Implement secure API design patterns including authentication, authorization, input validation, rate limiting, and protection against common API vulnerabilities

io.github.sickn33/antigravity-awesome-skills/api-patterns

API design principles and decision-making. REST vs GraphQL vs tRPC selection, response formats, versioning, pagination.

io.github.InugamiDev/ultrathink-oss/css-foundations

Unified CSS/styling foundations — CSS architecture (modules, CSS-in-JS, cascade layers, container queries), CSS custom properties (design tokens, theming, runtime manipulation), CSS Grid (templates, auto-placement, subgrid), dark mode implementation, responsive design patterns (fluid typography, container queries, aspect ratios), general animation patterns, Framer Motion, Tailwind animate plugin.

io.github.aAAaqwq/AGI-Super-Team/css-ninja

Master CSS with Tailwind, CSS-in-JS, responsive layouts, animations, and modern styling patterns. Use when: (1) responsive design implementation, (2) Tailwind CSS setup and customization, (3) CSS-in-JS (styled-components, emotion), (4) complex layouts (Grid, Flexbox), (5) CSS animations and transitions, (6) dark mode implementation, (7) component styling systems, (8) CSS architecture (BEM, utility-first). Triggers: "responsive", "Tailwind", "styled-components", "CSS grid", "flexbox", "animation", "dark mode", "layout".

io.github.microsoft/agent-academy/assets

Use this skill when generating reports, tables, or email output to produce polished, self-contained, responsive HTML.

io.github.girijashankarj/cursor-handbook/automation-helper

Design and create automation workflows — shell scripts, Cursor hooks, GitHub Actions, cron jobs, and task runners. Use when the user asks to automate a process, create a script, or set up a workflow.

io.github.schalkneethling/masonry-gridlanes-wc/css-shared-first

Apply the Shared First CSS methodology when writing responsive styles. Use this skill whenever writing or reviewing CSS that involves media queries, responsive layouts, viewport-specific overrides, or breakpoint-driven design. Trigger when the user asks to write responsive CSS, refactor mobile-first CSS, or when any component or layout has viewport-specific styles. This skill replaces mobile-first pattern guidance — always prefer Shared First unless the user explicitly requests mobile-first.

io.github.schalkneethling/masonry-gridlanes-wc/css-token-use-validator

Validate CSS custom property usage against token definitions. Use when the user wants to check if CSS variables are properly defined, find unused tokens, detect typos in var() references, audit custom property, or when working between Figma design files and code. Works with single files, directories, or entire projects. Can be used as a Claude Code hook to automatically validate after CSS edits.

io.github.ruby-git/ruby-git/refactor-command-to-commandlineresult

Migrates a command class that still performs parsing or custom execution logic to return raw Git::CommandLineResult, moving parsing to facade/parser layers. Use during architectural redesign refactoring.

io.github.spencerpauly/awesome-cursor-skills/database-design

Design database schemas — tables, relationships, indexes, constraints, and ORM setup. Covers relational design, normalization, and common patterns.

io.github.kostja94/marketing-skills/mobile-friendly

When the user wants to optimize for mobile-first indexing or fix mobile usability. Also use when the user mentions "mobile-friendly," "mobile-first indexing," "mobile SEO," "responsive design," "mobile adaptation," "mobile viewport," "viewport meta," "touch targets," "font size mobile," "AMP," or "Accelerated Mobile Pages." For viewport meta, use page-metadata.

io.github.UnicomAI/wanwu/frontend-dev

Full-stack frontend development combining premium UI design, cinematic animations, AI-generated media assets, persuasive copywriting, and visual art. Builds complete, visually striking web pages with real media, advanced motion, and compelling copy. Use when: building landing pages, marketing sites, product pages, dashboards, generating media assets (image/video/audio/music), writing conversion copy, creating generative art, or implementing cinematic scroll animations.

io.github.github/awesome-copilot/python-pypi-package-builder

End-to-end skill for building, testing, linting, versioning, and publishing a production-grade Python library to PyPI. Covers all four build backends (setuptools+setuptools_scm, hatchling, flit, poetry), PEP 440 versioning, semantic versioning, dynamic git-tag versioning, OOP/SOLID design, type hints (PEP 484/526/544/561), Trusted Publishing (OIDC), and the full PyPA packaging flow. Use for: creating Python packages, pip-installable SDKs, CLI tools, framework plugins, pyproject.toml setup, py.typed, setuptools_scm, semver, mypy, pre-commit, GitHub Actions CI/CD, or PyPI publishing.

io.github.timescale/pg-aiguide/design-postgres-tables

Use this skill for general PostgreSQL table design. **Trigger when user asks to:** - Design PostgreSQL tables, schemas, or data models when creating new tables and when modifying existing ones. - Choose data types, constraints, or indexes for PostgreSQL - Create user tables, order tables, reference tables, or JSONB schemas - Understand PostgreSQL best practices for normalization, constraints, or indexing - Design update-heavy, upsert-heavy, or OLTP-style tables **Keywords:** PostgreSQL schema, table design, data types, PRIMARY KEY, FOREIGN KEY, indexes, B-tree, GIN, JSONB, constraints, normalization, identity columns, partitioning, row-level security Comprehensive reference covering data types, indexing strategies, constraints, JSONB patterns, partitioning, and PostgreSQL-specific best practices.

io.github.timescale/pg-aiguide/design-postgis-tables

Comprehensive PostGIS spatial table design reference covering geometry types, coordinate systems, spatial indexing, and performance patterns for location-based applications

io.github.Lionad-Morotar/local-tools/css-animate

Create performant CSS animations using composited properties, scroll-driven animations, View Transitions, and @keyframes choreography. Always includes prefers-reduced-motion fallback. Use when the user asks for CSS animation, transition, scroll animation, view transition, keyframes, hover effect, entrance animation, or motion design.

io.github.Lionad-Morotar/local-tools/css-theme

Build theming systems with modern CSS. Covers custom properties architecture (primitive, semantic, component tokens), oklch/oklab color spaces, color-mix() for tints and shades, light-dark() for automatic dark mode, @property for typed custom properties, multiple theme support, contrast themes, and forced-colors mode. Use when building a theme, adding dark mode, creating color systems, setting up design tokens, or implementing color schemes.

io.github.Lionad-Morotar/local-tools/css-responsive

Modern responsive design using container queries, fluid typography, responsive images, logical properties, viewport units, intrinsic sizing, and preference queries. Prioritizes container queries over media queries. Use when the user asks for responsive CSS, responsive design, mobile layout, fluid typography, responsive images, dark mode, prefers-reduced-motion, or adaptive design.

io.github.Lionad-Morotar/local-tools/css-refactor

Upgrade legacy CSS to modern standards. Scans stylesheets for outdated patterns (floats, clearfix, vendor prefixes, old flexbox syntax, px media queries, @import, !important abuse) and replaces them with modern equivalents. Introduces cascade layers, extracts design tokens, and consolidates redundancy. Use when refactoring CSS, modernizing stylesheets, upgrading legacy code, removing vendor prefixes, or replacing floats with grid/flexbox.

io.github.wondelai/skills/refactoring-patterns

Apply named refactoring transformations to improve code structure without changing behavior. Use when the user mentions "refactor this", "code smells", "extract method", "replace conditional", "technical debt", "move method", "inline variable", or "decompose conditional". Also trigger when cleaning up legacy code, preparing code for new features by restructuring, or identifying which transformation to apply to a specific code smell. Covers smell-driven refactoring, safe transformation sequences, and testing guards. For code quality foundations, see clean-code. For managing complexity, see software-design-philosophy.

io.github.wondelai/skills/refactoring-ui

Audit and fix visual hierarchy, spacing, color, and depth in web UIs. Use when the user mentions "my UI looks off", "fix the design", "Tailwind styling", "color palette", "visual hierarchy", "design system", "spacing scale", or "component styling". Also trigger when building consistent design tokens, creating dark mode themes, improving data visualization clarity, or polishing UI details before launch. Covers grayscale-first workflow, constrained design scales, shadows, and component styling. For typeface selection, see web-typography. For usability audits, see ux-heuristics.

io.github.spacedriveapp/spacebot/writing-guide

Use when writing or editing any Spacebot copy — README sections, docs, release notes, marketing text, design doc summaries. Covers voice, tone, patterns to avoid, and what good Spacebot writing sounds like.