Web & Frontend

asymmetric-al Bundle

This skill encodes Emil Kowalski's philosophy on UI polish, component design, animation decisions, and the invisible details that make software feel great. Use as a craft companion after Core's frontend, emil-design-engineering, and anim guidance.

asymmetric-al Skill

Build correct cached/dynamic boundaries in the Next.js App Router when Cache Components or PPR are enabled. Use when working with cacheComponents, Partial Prerendering (PPR), 'use cache', cacheLife, cacheTag, updateTag, or revalidateTag, to avoid request-context leaks and enforce proper cache invalidation. Not for the Pages Router or when Cache Components/PPR are off.

asymmetric-al Bundle

Build modern, composable, and accessible React UI components following the components.build specification. Use when creating, reviewing, or refactoring component libraries, design systems, or any reusable UI components. Triggers on tasks involving component APIs, composition patterns, accessibility, styling systems, or TypeScript props.

asymmetric-al Bundle

Generate an interactive PR review walkthrough as an HTML page. Fetches PR data via gh API, categorizes files into core vs mechanical changes, adds reviewer annotations, and renders diffs with moved-code detection. Use when the user pastes a GitHub PR URL and asks for a review, walkthrough, or summary, or says "review this PR".

asymmetric-al Skill

Ensure correct Next.js App Router architecture, rendering strategy, and data fetching. Use whenever working under /app — routing, layouts, server/client component boundaries, data fetching, Suspense, and Server Actions. Defaults to Server Components and adds 'use client' only for interactivity. Not for the Pages Router (/pages).

asymmetric-al Bundle

Set up Tailwind v4 with shadcn/ui using @theme inline pattern and CSS variable architecture. Four-step pattern: CSS variables, Tailwind mapping, base styles, automatic dark mode. Prevents 8 documented errors. Use when initializing React projects with Tailwind v4, or fixing colors not working, tw-animate-css errors, @theme inline dark mode conflicts, @apply breaking, v3 migration issues.

asymmetric-al Bundle

Build UI with Core's shadcn/Base UI system. Use for selecting, installing, composing, or customizing shadcn/ui, registry items, themes, and wrappers. Always preserve exact style `base-maia`, Zinc-oriented semantic CSS-variable tokens, and Base UI primitives. Do not use to switch styles, run `shadcn init`, or introduce Radix/React Aria. Pair with `packages/ui/AGENTS.md`.

asymmetric-al Skill

Build reusable, accessible React components with predictable APIs and ref forwarding. Use when creating or refactoring components or defining component APIs, favoring composition over configuration and slots/children over many boolean props. Not needed for style-only or content-only edits that do not change a component API.

asymmetric-al Bundle

Audit and fix accessibility in Core UI. Use when changing or reviewing buttons, links, forms, validation, dialogs, menus, tabs, tables, keyboard interactions, focus management, accessible names, announcements, contrast, touch targets, reduced motion, or WCAG/a11y behavior.

asymmetric-al Skill

Integrate Supabase Auth with Next.js App Router using middleware, callback handling, protected routes, and server/client client boundaries.

asymmetric-al Skill

Build scalable design systems with Tailwind CSS v4, design tokens, component libraries, and responsive patterns. Use when creating component libraries, implementing design systems, or standardizing UI patterns.

asymmetric-al Bundle

HTML, CSS, and JavaScript craft guidelines from bendc/frontend-guidelines — semantics, a11y basics, selector discipline, motion-friendly CSS, and readable JS. Use for markup review, static HTML/CSS, email HTML, or general front-end hygiene; pair with repo frontend rules and TypeScript lint policy.

asymmetric-al Bundle

Use when building functions that must survive process crashes, retry automatically on failure, run on a schedule, react to events, or maintain state across infrastructure failures — e.g., webhook handlers that drop events, flaky cron jobs, background jobs that fail mid-execution, or workflows that need to resume where they left off. Covers Inngest function configuration, triggers (events, cron, invoke), step execution and memoization, idempotency, cancellation, error handling, retries, logging, and observability.

asymmetric-al Bundle

Guide for implementing smooth, native-feeling animations using React's View Transition API (`<ViewTransition>` component, `addTransitionType`, and CSS view transition pseudo-elements). Use this skill whenever the user wants to add page transitions, animate route changes, create shared element animations, animate enter/exit of components, animate list reorder, implement directional (forward/back) navigation animations, or integrate view transitions in Next.js. Also use when the user mentions view transitions, `startViewTransition`, `ViewTransition`, transition types, or asks about animating between UI states in React without third-party animation libraries.

urjuyaimon09 Bundle

This skill guides creation of distinctive, production-grade frontend interfaces that avoid generic "AI slop" aesthetics. Implement real working code with exceptional attention to aesthetic details and creative choices.

userinner Bundle

Upgrades existing websites and apps to premium quality. Audits current design, identifies generic AI patterns, and applies high-end design standards without breaking functionality. Works with any CSS framework or vanilla CSS.

userinner Bundle

Guides stable API and interface design. Use when designing APIs, module boundaries, or any public interface. Use when creating REST or GraphQL endpoints, defining type contracts between modules, or establishing boundaries between frontend and backend.

userinner Bundle

Optimizes application performance across frontend, backend, queries, and databases. Use when performance requirements exist, when you suspect performance regressions, when Core Web Vitals or load times need improvement, when N+1 query patterns need fixing, or when profiling reveals bottlenecks.

userinner Bundle

Open plans and HTML artifacts in a local browser canvas where the human annotates elements, chats, and approves or requests changes without leaving the page. Use when presenting a plan for review, or when feedback like "move this, change that" is easier pointed at than typed.

userinner Bundle

React 18/19 patterns including hooks discipline, server/client component boundaries, Suspense + error boundaries, form actions, data fetching, state management decision trees, and accessibility-first composition. Use when writing or reviewing React components.

userinner Bundle

Frontend development patterns for React, Next.js, state management, performance optimization, and UI best practices. Use when building or reviewing React or Next.js components, state, or render performance.

kora-projects Bundle

Build and maintain Java/Kotlin services on the Kora Framework 1.x (ru.tinkoff.kora) — compile-time DI, zero reflection, annotation processors (Java) or KSP (Kotlin). Routes to 39 domain sub-skills. Use when the request mentions Kora, or uses Kora APIs: @KoraApp, @Component, @Module, @KoraSubmodule, @Root, @Tag, @HttpController, @HttpRoute, @HttpClient, @Repository, @Query, @EntityJdbc, @KafkaListener, @KafkaPublisher, gRPC, SOAP/WSDL, @S3.Client, MapStruct, @Json, @ConfigSource (HOCON/YAML), OpenAPI codegen, @KoraAppTest, Testcontainers, @Valid, @Validate, @Log, @Mdc, @Retry, @CircuitBreaker, @Timeout, @Fallback, @Schedule*, @Cacheable, @CachePut, @CacheInvalidate, Micrometer/Prometheus metrics, OpenTelemetry/OTLP tracing, Undertow, Hikari. Also use for Kora project setup, Gradle/BOM dependencies, DI graph errors, or explaining Kora concepts. Do not use for Spring Boot, Micronaut, or Quarkus work.

kora-projects Bundle

Build and maintain Java/Kotlin services on the Kora Framework 2.0 (io.koraframework) — compile-time DI, zero reflection, synchronous contracts on virtual threads, annotation processors (Java) or KSP (Kotlin). Routes to 39 domain sub-skills. Use when the request mentions Kora, or uses Kora APIs: @KoraApp, @Component, @Module, @KoraSubmodule, @Root, @Tag, @Conditional, @FactoryModule, @HttpController, @HttpRoute, @HttpClient, @Repository, @Query, @EntityJdbc, @KafkaListener, @KafkaPublisher, gRPC, SOAP/WSDL, @S3.Client, @S3.Head, MapStruct, Konvert, @Json, @ConfigSource, @ConfigMapper (HOCON/YAML), OpenAPI codegen, @KoraAppTest, Testcontainers, @Valid, @Validate, @Log, @Mdc, @Retryable, @CircuitBreakable, @Timeout, @RateLimited, @Fallback, @Schedule*, @Cacheable, @CachePut, @CacheInvalidate, @CacheInvalidateAll, Micrometer/Prometheus metrics, OpenTelemetry/OTLP tracing, Undertow, Hikari. Also use for Kora project setup, Gradle/BOM dependencies, DI graph errors, or explaining Kora concepts. Do not use for Spring

kora-projects Bundle

MapStruct in Kora — an @Mapper interface is auto-discovered and its generated *MapperImpl registered in the graph (no @Component). Use for DTO↔entity mapping. Java uses the MapStruct processor; Kotlin needs kapt alongside KSP.

kora-projects Bundle

Compile-time DI in Kora — @KoraApp, @Component, @Module, @KoraSubmodule, @Root. Use when wiring the application graph or debugging "no factory found"/ambiguous/circular dependency errors. For runtime DI behavior see kora-di-runtime.

kora-projects Bundle

Kora gRPC server handlers — GrpcServerModule, @Component extending the generated *GrpcImplBase, ServerInterceptor, grpcServer config, reflection. Use when serving gRPC RPCs (unary/streaming) from a Kora service.

kora-projects Bundle

Kora Kafka consumers — @KafkaListener on a @Component method (KafkaModule), commit strategies, @Json deserialization, error handling, batch. Use when consuming Kafka messages or configuring kafka.consumer.

kora-projects Bundle

In-process JUnit 5 tests for Java Kora services — @KoraAppTest, @TestComponent, Mockito, config/graph modifiers, Testcontainers (test-junit5). Use when testing a Kora graph, mocking a component, or spinning up a DB/broker.

kora-projects Bundle

Generate Kora HTTP server code from an OpenAPI 3.x spec (generatorName "kora") — *ApiController + *ApiDelegate implemented with @Component + sealed *ApiResponses. Use for a contract-first server; implement the delegate, don't hand-write a controller.

blockmatic Bundle

nuqs (type-safe URL query state) best practices for Next.js and other React frameworks. This skill should be used when writing, reviewing, or refactoring code that uses nuqs for URL state management. Triggers on tasks involving useQueryState, useQueryStates, search params, URL state, query parameters, nuqs parsers, limitUrlUpdates, Standard Schema, NuqsAdapter, or Next.js routing with state.

blockmatic Bundle

Next.js 16 App Router performance, caching, server components, server actions, routing, and codebase-hygiene best practices — plus a category-major review/refactor algorithm with codebase-level (remove/dedup/reuse) findings. This skill should be used when writing Next.js 16 App Router code, configuring caching with 'use cache' or the previous fetch-cache model, building Server Components, setting up parallel/intercepting routes, configuring next.config OR proxy.ts, OR auditing/refactoring a Next.js codebase (single file or whole repo). This skill does NOT cover generic React 19 patterns (use vercel-react-v1) or non-Next.js server rendering.

blockmatic Bundle

Wagmi v3 wallet and contract hooks for React/Next.js. Use when connecting wallets, reading/writing contracts, or handling transaction state.

blockmatic Skill

Utility hooks for React state management — grouped state and localStorage persistence. Use when managing grouped state that changes together, persisting state to localStorage, or coordinating state between URL and storage.

blockmatic Bundle

Set up Tailwind v4 with shadcn/ui using @theme inline pattern and CSS variable architecture — component composition, accessibility, React Hook Form. Use when initializing React projects with Tailwind v4, setting up shadcn/ui dark mode, composing components, implementing forms, fixing theme/CSS issues, or migrating from v3.

blockmatic Bundle

Solana dApp UI with kit and web3.js. Use when wallet connect, transactions, or Solana address validation in React/Next.js.

blockmatic Bundle

React animations with Motion v13 (gestures, scroll, layout, SVG). Use when drag-and-drop, scroll animations, modals, carousels, parallax, or AnimatePresence issues.