ai

REST and GraphQL API design principles — resource modeling, HTTP semantics, pagination, error handling, HATEOAS, schema design, and DataLoader patterns. Use when designing new APIs, reviewing specs, or establishing team API standards.

Meta-skill that orchestrates the full API development lifecycle — from design through documentation — by coordinating specialized skills, agents, and commands into a seamless build workflow.

API versioning strategies — URL path, header, query param, content negotiation — with breaking change classification, deprecation timelines, migration patterns, and multi-version support. Use when evolving APIs, planning breaking changes, or managing version lifecycles.

Authentication and authorization patterns — JWT, OAuth 2.0, sessions, RBAC/ABAC, password security, MFA, and vulnerability prevention. Use when implementing login flows, protecting routes, managing tokens, or auditing auth security.

Caching strategies, invalidation, eviction policies, HTTP caching, distributed caching, and anti-patterns. Use when designing cache layers, choosing eviction policies, debugging stale data, or optimizing read-heavy workloads.

Safe, zero-downtime database migration strategies — schema evolution, rollback planning, data migration, tooling, and anti-pattern avoidance for production systems. Use when planning schema changes, writing migrations, or reviewing migration safety.

Error handling patterns across languages and layers — operational vs programmer errors, retry strategies, circuit breakers, error boundaries, HTTP responses, graceful degradation, and structured logging. Use when designing error strategies, building resilient APIs, or reviewing error management.

Rate limiting algorithms, implementation strategies, HTTP conventions, tiered limits, distributed patterns, and client-side handling. Use when protecting APIs from abuse, implementing usage tiers, or configuring gateway-level throttling.

Design and implement event stores for event-sourced systems. Use when building event sourcing infrastructure, implementing event persistence, projections, snapshotting, or CQRS patterns.

Production Go concurrency patterns — goroutines, channels, sync primitives, context, worker pools, pipelines, and graceful shutdown. Use when building concurrent Go applications or debugging race conditions.

Build and manage monorepos with Turborepo, Nx, and pnpm workspaces — covering workspace structure, dependency management, task orchestration, caching, CI/CD, and publishing. Use when setting up monorepos, optimizing builds, or managing shared packages.

PostgreSQL-based job queue with priority scheduling, batch claiming, and progress tracking. Use when building job queues without external dependencies. Triggers on PostgreSQL job queue, background jobs, task queue, priority queue, SKIP LOCKED.

Controller-service-query layered API architecture with data enrichment and parallel fetching. Use when building REST APIs or GraphQL resolvers with clean separation of concerns. Triggers on API architecture, service layer, controller pattern, data enrichment, REST API.

Postgres performance optimization and best practices from Supabase — covering indexing, connection management, RLS security, schema design, locking, data access patterns, and monitoring. Use when writing SQL, designing schemas, optimizing queries, or configuring Postgres.

Patterns for animating financial numbers with spring physics, formatting, and visual feedback. Covers animated counters, price tickers, percentage changes, and value flash effects. Use when building financial dashboards or trading UIs. Triggers on animated number, price animation, financial display, number formatting, spring animation, value ticker.

Patterns for building design system components using Surface primitives, CVA variants, and consistent styling. Use when building reusable UI components that follow design token architecture. Triggers on Surface component, CVA, class-variance-authority, component variants, design tokens.

Foundational design system architecture — token hierarchies, theming infrastructure, token pipelines, and governance. Use when creating design tokens, implementing theme switching, setting up Style Dictionary, or establishing multi-brand theming. Triggers on design tokens, theme provider, Style Dictionary, token pipeline, multi-brand theming, CSS custom properties architecture.

Patterns for creating design systems with personality and distinctive aesthetics. Covers aesthetic documentation, color token architecture, typography systems, layered surfaces, and motion. Use when building design systems that go beyond generic templates. Triggers on design system, design tokens, aesthetic, color palette, typography, CSS variables, tailwind config.

Patterns for building dark-themed financial charts and data visualizations. Covers chart theming, color scales for gains/losses, and real-time data display. Use when building trading dashboards or financial analytics. Triggers on chart theme, data visualization, financial chart, dark theme, gains losses, trading UI.

Patterns for skeleton loaders, shimmer effects, and loading states that match design system aesthetics. Covers skeleton components, shimmer animations, and progressive loading. Use when building polished loading experiences. Triggers on skeleton, loading state, shimmer, placeholder, loading animation.

Curated collection of professional color and typography themes for styling artifacts — slides, docs, reports, landing pages. Use when applying visual themes to presentations, generating themed content, or creating custom brand palettes. Triggers on theme, color palette, font pairing, slide styling, presentation theme, brand colors.

Comprehensive UI design skill covering fundamentals, patterns, and anti-patterns. Layout, typography, color, spacing, accessibility, motion, and component design. Use when building any web interface, reviewing design quality, or creating distinctive UIs.

Searchable UI/UX design databases: 50+ styles, 97 palettes, 57 font pairings, 99 UX rules, 25 chart types. CLI generates design systems from natural language. Data-driven complement to ui-design.

CSS implementation patterns for layout, typography, color, spacing, and responsive design. Complements ui-design (fundamentals) with code-focused examples.

Prometheus monitoring — scrape configuration, service discovery, recording rules, alert rules, and production deployment for infrastructure and application metrics.

Smart contract security patterns, vulnerability prevention, gas optimization, and audit preparation for Solidity development. Use when writing, auditing, or hardening smart contracts against reentrancy, overflow, access control, oracle manipulation, and front-running attacks.

Extract design systems, architecture patterns, and methodology from codebases into reusable skills and documentation. Use when analyzing a project to capture patterns, creating skills from existing code, extracting design tokens, or documenting how a project was built. Triggers on "extract patterns", "extract from this repo", "analyze this codebase", "create skills from this project", "extract design system".

Build beautiful native iOS/Android apps with Expo Router. Covers route structure, native tabs, animations, blur effects, liquid glass, SF Symbols, and platform patterns.

Create distinctive, production-grade frontend interfaces that avoid generic "AI slop" aesthetics. Focuses on creative direction and memorable design choices.

Building native mobile UIs with Expo Router and React Native. Covers routing, navigation, styling, native controls, animations, and platform conventions following Apple Human Interface Guidelines.

Next.js App Router best practices — Server Components, data fetching, caching, routing, middleware, metadata, error handling, streaming, Server Actions, and performance optimization for Next.js 14-16+.

React and Next.js performance optimization guidelines from Vercel Engineering. 57 rules across 8 categories for writing, reviewing, and refactoring React code.

React composition patterns for scalable component architecture. Use when refactoring components with boolean prop proliferation, building flexible component libraries, designing reusable component APIs, or working with compound components and context providers.

React and Next.js performance optimization patterns. Use when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance. Triggers on tasks involving components, data fetching, bundle optimization, re-render reduction, or server component architecture.

Build accessible, customizable UIs with shadcn/ui, Radix UI, and Tailwind CSS. Use when setting up shadcn/ui, installing components, building forms with React Hook Form + Zod, customizing themes, or implementing component patterns.

Plan content aligned with user personas and journey stages. Use when asked to "plan content," "create content strategy," "build editorial calendar," "map content to personas," "audit existing content," or when aligning marketing/docs content with user journeys defined in persona docs.

When the user wants to optimize post-signup onboarding, user activation, first-run experience, or time-to-value. Also use when the user mentions "onboarding flow," "activation rate," "user activation," "first-run experience," "empty states," "onboarding checklist," "aha moment," or "new user experience." For signup/registration optimization, see signup-flow-cro.

When the user wants to optimize signup, registration, account creation, or trial activation flows. Also use when the user mentions "signup conversions," "registration friction," "signup form optimization," "free trial signup," "reduce signup dropoff," or "account creation flow." For post-signup onboarding, see onboarding-cro.

When the user wants help creating, scheduling, or optimizing social media content for LinkedIn, Twitter/X, Instagram, TikTok, Facebook, or other platforms. Also use when the user mentions "LinkedIn post," "Twitter thread," "social media," "content calendar," "social scheduling," "engagement," or "viral content." Covers content creation, repurposing, and platform-specific strategies.

When the user asks about startup metrics, SaaS metrics, unit economics, or business performance tracking. Triggers on: "startup metrics", "SaaS metrics", "CAC and LTV", "unit economics", "burn multiple", "rule of 40", "magic number", "marketplace metrics", "churn rate", "MRR", "ARR", "net revenue retention", "runway", or requests for metrics dashboards and investor reporting.