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What are Skills?

Skills are modular knowledge domains that agents can load on-demand based on task context. Each skill contains:
  • Instructions: Best practices and patterns (SKILL.md)
  • References: Templates, documentation, examples
  • Scripts: Validation and automation tools (Python/Bash)
  • Assets: Images, logos, configuration files

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On-Demand Loading

Skills are loaded dynamically when needed:
  1. Request Analysis: System analyzes your task
  2. Skill Matching: Identifies relevant skills
  3. Dynamic Loading: Loads SKILL.md and references
  4. Script Execution: Runs validation scripts (with approval)
User: "Build a REST API"
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Keyword Match: "API" → api-patterns skill
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Load: .agent/skills/api-patterns/SKILL.md
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Read References: rest.md, graphql.md, auth.md
     ↓
Agent Now Has: API design patterns, auth strategies

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Skill Categories

Antigravity Kit includes 36 skills organized by domain:

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Frontend & UI

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react-best-practices
React & Next.js performance optimizationComprehensive React and Next.js patterns from Vercel. 57 performance rules covering:
  • Eliminating waterfalls
  • Bundle size optimization
  • Server-side performance
  • Client-side data fetching
  • Re-render optimization
Source: Vercel best practices
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web-design-guidelines
Web UI audit - 100+ rulesComprehensive web design checklist covering accessibility, UX, performance. From Vercel.
  • WCAG compliance
  • Performance optimization
  • Mobile-first design
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tailwind-patterns
Tailwind CSS v4 utilitiesModern Tailwind patterns, custom configurations, design tokens.
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frontend-design
UI/UX patterns & design systemsColor systems, typography, animation guides, visual effects, UX psychology.References: color-system.md, typography-system.md, animation-guide.md
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ui-ux-pro-max
50 styles, 21 palettes, 50 fontsProfessional design system with extensive style library.

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Backend & API

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api-patterns
REST, GraphQL, tRPCAPI design patterns, authentication strategies, documentation templates.Script: api_validator.py
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nestjs-expert
NestJS modules, DI, decoratorsEnterprise-grade Node.js framework patterns.
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nodejs-best-practices
Node.js async, modulesModern Node.js patterns, async/await, error handling.
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python-patterns
Python standards, FastAPIPython best practices, FastAPI patterns, async programming.

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Database

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database-design
Schema design & optimizationDatabase selection, schema design, indexing, migrations, optimization.References: schema-design.md, indexing.md, optimization.mdScript: schema_validator.py
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prisma-expert
Prisma ORM & migrationsPrisma schema design, migrations, query optimization.

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TypeScript/JavaScript

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typescript-expert
Type-level programming & performanceAdvanced TypeScript patterns, generics, utility types.

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Cloud & Infrastructure

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docker-expert
Containerization & ComposeDocker best practices, multi-stage builds, optimization.
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deployment-procedures
CI/CD & deploy workflowsDeployment strategies for Vercel, AWS, Docker, GitHub Actions.
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server-management
Infrastructure managementServer configuration, monitoring, scaling.

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Testing & Quality

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testing-patterns
Jest, Vitest, strategiesUnit testing patterns, mocking, coverage strategies.Script: test_runner.py
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webapp-testing
E2E, PlaywrightEnd-to-end testing with Playwright, user flow testing.Script: playwright_runner.py
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tdd-workflow
Test-driven developmentTDD methodology, red-green-refactor cycle.
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code-review-checklist
Code review standardsComprehensive code review checklist.
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lint-and-validate
Linting & validationESLint, TypeScript, code quality tools.Scripts: lint_runner.py, type_coverage.py

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Security

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vulnerability-scanner
Security auditing, OWASPSecurity scanning, vulnerability detection, OWASP Top 10.Script: security_scan.py
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red-team-tactics
Offensive securityPenetration testing, security exploitation.

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Architecture & Planning

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app-builder
Full-stack app scaffoldingProject templates, structure generation. 20 reference files.
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architecture
System design patternsArchitecture patterns, trade-off analysis, pattern selection.References: patterns-reference.md, trade-off-analysis.md
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plan-writing
Task planning & breakdownTask decomposition, estimation, milestone planning.
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brainstorming
Socratic questioningDiscovery through questioning, exploring options.References: dynamic-questioning.md

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Mobile

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mobile-design
Mobile UI/UX patternsiOS/Android design, navigation, performance, touch psychology.References: platform-ios.md, platform-android.md, touch-psychology.mdScript: mobile_audit.py

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Game Development

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game-development
Game logic & mechanics2D/3D games, multiplayer, game design, audio, art. 10 sub-skills.

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SEO & Growth

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seo-fundamentals
SEO, E-E-A-T, Core Web VitalsSearch engine optimization, meta tags, performance.Script: seo_checker.py
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geo-fundamentals
GenAI optimizationOptimization for AI search engines, LLM visibility.Script: geo_checker.py

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Shell/CLI

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bash-linux
Linux commands & scriptingBash scripting, Linux system administration.
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powershell-windows
Windows PowerShellPowerShell scripting, Windows automation.

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Other

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clean-code
Coding standards (Global)Universal code quality principles applied by all agents.
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behavioral-modes
Agent personasDifferent behavioral modes for agents.
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parallel-agents
Multi-agent patternsCoordination patterns for multiple agents.
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mcp-builder
Model Context ProtocolBuilding MCP servers and clients.
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documentation-templates
Doc formatsDocumentation templates and formats.
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i18n-localization
InternationalizationMulti-language support, locale management.Script: i18n_checker.py
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performance-profiling
Web Vitals & optimizationPerformance profiling, Lighthouse audits.Script: lighthouse_audit.py
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systematic-debugging
TroubleshootingSystematic debugging methodology, root cause analysis.
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intelligent-routing
Agent routing logicSmart agent selection based on context.

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Skill Structure

Each skill follows a standard structure: 
.agent/skills/skill-name/
├── SKILL.md           # Main instructions & metadata
├── scripts/           # Automation scripts
│   ├── validator.py
│   └── analyzer.py
├── references/        # Templates & documentation
│   ├── patterns.md
│   └── examples.md
└── assets/            # Images, configs
    └── logo.png

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Enhanced Skills

Some skills include extensive reference materials:
SkillFilesCoverage
ui-ux-pro-max2750 styles, 21 palettes, 50 fonts
app-builder20Full-stack scaffolding templates
mobile-design13Complete mobile design system
nextjs-react-expert1057 React performance rules

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Validation Scripts

Many skills include automated scripts: 
# Security scan
python .agent/skills/vulnerability-scanner/scripts/security_scan.py .

# SEO check
python .agent/skills/seo-fundamentals/scripts/seo_checker.py .

# Lighthouse audit
python .agent/skills/performance-profiling/scripts/lighthouse_audit.py http://localhost:3000

# Mobile audit
python .agent/skills/mobile-design/scripts/mobile_audit.py .
Scripts are suggested by agents but require user approval before execution.

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