Web & Frontend

blockmatic Bundle

Build React chat UIs with Vercel AI SDK v7 — useChat, DefaultChatTransport, status, sendMessage. Use when implementing AI SDK v7 chat UIs or troubleshooting useChat stream parse / no response / stale values. Never write useChat from memory.

blockmatic Bundle

Generate TypeScript clients from OpenAPI specs using @hey-api/openapi-ts — type-safe API clients. Use when generating TypeScript clients from OpenAPI specifications for frontend or API consumers.

blockmatic Bundle

React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.

blockmatic Skill

TanStack Query (React Query) for async operations, data fetching, caching, and state management. Use when fetching server data, managing async operations, caching responses, handling mutations, or any operation that benefits from automatic state management and caching.

keyvaluesoftwaresystems Skill

Write or narrowly repair one buildable repository LLD from an approved HLD, confirmed repo decisions, and bounded code evidence, including an implementation-complete data model and a frontend-ready API/client contract in concise, skimmable technical English.

keyvaluesoftwaresystems Skill

Generate the cross-repo API/event CONTRACT (OpenAPI) by reconciling the per-stack LLDs — the backend LLD (what it exposes) and the frontend LLD (what it consumes) — into the single boundary both build against. Also derives acceptance criteria and the affected stacks. Reads the LLDs; writes the contract; never edits app code. Front door for /api-contract.

keyvaluesoftwaresystems Skill

Author the backend low-level design (LLD) for a feature — read the relevant backend code to ground the design, then design how the feature slots in — component/sequence design, data model + migration plan, the API/events the backend will expose, error handling, security, observability, and test plan. Writes the LLD doc; never edits app code. Front door for /backend-design.

keyvaluesoftwaresystems Skill

Split an approved frontend scope + contract into a small, ordered, test-first task list with a verification step per task and risk flags. Read-only planning — never edits code.

keyvaluesoftwaresystems Skill

Author the frontend low-level design (LLD) for a feature — read the relevant frontend code to ground the design, then design component/state architecture, routing, the full UI-state matrix, the API it needs to consume, accessibility, performance, i18n, and tests. Writes the LLD doc; never edits app code. Front door for /frontend-design.

keyvaluesoftwaresystems Skill

Review the frontend implementation — UI-state completeness, accessibility, security, resilience, forms, performance, type safety, component quality, state management, responsive/i18n, test gaps. Read-only; writes a review artifact. Front door for /frontend-review.

keyvaluesoftwaresystems Skill

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.

keyvaluesoftwaresystems Skill

Implement an approved frontend scope by consuming the cross-repo contract exactly, with all required UI states, meeting the frontend engineering standards (accessibility, performance, security, i18n, resilience). Edits code within scope only. Front door for /frontend-implement.

keyvaluesoftwaresystems Skill

React and Next.js performance optimization patterns adapted from Vercel Engineering's React Best Practices (https://github.com/vercel-labs/agent-skills). Organizes 70+ rules across 8 priority categories — waterfalls, bundle size, server-side, client fetching, re-render, rendering, JS micro-perf, advanced. Use when writing, reviewing, or refactoring React/Next.js code for performance.

keyvaluesoftwaresystems Skill

React Native and Expo app patterns — Expo Router navigation, state separation (server/client/route/form), TanStack Query data fetching with Zod, performant lists, NativeWind/StyleSheet styling, native APIs, and secure storage. Use when building or editing React Native / Expo screens, components, navigation, or data layers.

marius-townhouse Skill

Use when modeling structured string patterns. Use when parsing DSLs like CSS selectors. Use when transforming string types. Use when validating string formats. Use when combining with mapped types.

marius-townhouse Skill

Use when exactly one of several properties should be present. Use when modeling mutually exclusive options. Use when building component props with alternative configurations. Use when designing API parameters that have variants.

znlgis Skill

Use when developing with .NET/C# for Web APIs, ORM data access, Excel/Word file I/O, spreadsheet controls, error tracking, or .NET code protection. Index of 9 skills: Furion, Admin.NET Backend, Admin.NET Frontend, SqlSugar, NPOI, SOD, ReoGrid, DotNet Reactor, Sentry.

znlgis Skill

Use when embedding interactive 2D maps in .NET desktop (WinForms/WPF) or mobile (MAUI) applications — tile layers, vector features, map controls. Mapsui: cross-platform .NET map component library.

praxstack Skill

ACTIVATION TRIGGER. Use this skill when the user demands "Ultrafrontend", "High-End UX", "Awwwards Style", or world-class UI design. This skill enforces a design-first workflow with zero-compromise aesthetics.

praxstack Bundle

Coordinate a cross-functional star-team workflow (Product Manager, Principal Engineer, Backend, Frontend, QA/Security, DevOps) with mandatory architecture and code-review checkpoints. Use when a request needs end-to-end product delivery, multi-role collaboration, or explicit role-based outputs (PM/PE/Backend/Frontend/QA/DevOps), or when the user asks for "star team", "cross-functional", "full lifecycle", or "multi-role" planning.

praxstack Skill

Internal loader for principal-engineer domain standards across backend, frontend, and security. Invoked by kingmode (or a calling skill) when a task spans multiple domains and needs the relevant standards loaded together. Does NOT make user-facing mode decisions — that is kingmode's job. Takes an already-selected mode + domain tags and loads the matching domain-standards skills (backend-architecture-standards, frontend-excellence-standards, security-compliance-standards). Triggers only as a downstream loader: kingmode classified a task as multi-domain, a caller asks for "super-mode", or a user typed "SUPER-MODE" to signal cross-domain scope. Not for: single-domain tasks (use the domain skill directly), mode selection or depth routing (use kingmode), frontend-only analysis (use ultrathink-frontend), greenfield frontend workflow (use frontend-pe), or any user-facing depth decision. Pure loader — no mode routing, no user-facing output.

praxstack Skill

Principal-engineer-grade Python backend design, implementation, and review. Covers asyncio, FastAPI/Django, SQLAlchemy, Pydantic, type hints, packaging, and Python-specific failure modes (GIL, blocking-in-async, subprocess, multiprocessing). Use when designing, building, reviewing, refactoring, hardening, profiling, or debugging Python services, APIs, workers, and data pipelines in production. Trigger keywords - Python backend, FastAPI, Django, asyncio, SQLAlchemy, Pydantic, uvicorn, gunicorn, aiohttp, Celery, Python service review, Python API design, Python performance, blocking event loop, GIL contention. Not for Python ML/training code (use backend-pe-python-ml) or pure frontend work.

praxstack Bundle

Infrastructure-as-code, CI/CD, Kubernetes, observability, and reliability engineering for production systems. Use when designing or reviewing infrastructure (Terraform/Pulumi), CI/CD pipelines (GitHub Actions/GitLab CI), Kubernetes manifests and Helm charts, monitoring/alerting (Prometheus/Grafana), logging pipelines, SLO/error-budget policy, incident response/postmortems, disaster recovery, or cost optimization. Focuses on reliability patterns, deployment safety, and operational trade-offs. Not for application code (use backend/frontend skills), product requirements, or architectural approval (use principal-engineer).

praxstack Skill

Two-mode frontend architecture skill — Default for concise production-ready UI and ULTRATHINK for exhaustive multi-dimensional analysis. Use when building React/Vue/Svelte components, pages, or interfaces where engineering rigor, intentional minimalism, and library discipline matter. Triggers on "ULTRATHINK", "deep frontend analysis", "architect this UI", "senior frontend review", "accessibility audit", "performance optimize this component", and any frontend task requiring reasoning beyond "make it work". Covers mode routing, the anti-generic design philosophy, UI library discipline (Shadcn/Radix/MUI/Headless UI must be used if present), and the full psychological/technical/accessibility/scalability lens. Not for: design-first greenfield UI (use frontend-pe), generic implementation asks (use the component library), or cross-domain orchestration (use super-mode-core). This is frontend analysis/review depth, not workflow.

praxstack Skill

Principal-engineer-grade JavaScript (non-TypeScript) backend design, implementation, and review. Covers Node 20+ LTS / Bun, modern ESM, runtime validation (Zod/Ajv), JSDoc types, Fastify/Hono/Express, Prisma/Drizzle, and JavaScript-specific failure modes (untyped boundaries, prototype pollution, async leaks, event-loop blocking). Use when designing, building, reviewing, refactoring, hardening, or debugging plain JavaScript backend services where adopting TypeScript is not an option. Trigger keywords - JavaScript backend, Node.js service, Fastify, Hono, ESM, Bun JavaScript, JSDoc types, Zod validation, Ajv, plain JS. Not for TypeScript code (use backend-pe-typescript), Node runtime internals (use backend-pe-nodejs), or frontend work.

praxstack Skill

Principal-engineer-grade TypeScript backend design, implementation, and review. Covers strict tsconfig, Zod schemas, Fastify/NestJS/tRPC/Hono, Prisma/Drizzle, ESM, Bun/Node 20 LTS runtimes, and TypeScript-specific failure modes (any leakage, narrow-type erosion, module resolution). Use when designing, building, reviewing, refactoring, hardening, or debugging TypeScript services and APIs. Trigger keywords - TypeScript backend, tsconfig strict, Zod, Fastify, NestJS, tRPC, Hono, Prisma, Drizzle, Bun backend, Node TypeScript, TS review, TS performance, type safety review. Not for TS frontend work, pure Node runtime internals (use backend-pe-nodejs), or plain JavaScript (use backend-pe-javascript).

harshsinghmp Bundle

Interactive project creator, DOX Engine, and Agent Engine provisioner. Bootstraps the 2-stage Agents-First architecture (AGENTS.md, 9-folder .agents/ container, 12 modular standards, brand tokens, and cognitive memory) before launching interactive framework creators (Astro, Next.js, Instatic, Hono, Vite). Trigger whenever the user asks for 'new-project', 'Agent Engine', 'DOX Engine', 'scaffold Project OS', or to initialize an agent-governed workspace.

harshsinghmp Skill

Expert UI designer specializing in visual design systems, component libraries, and pixel-perfect interface creation. Creates beautiful, consistent, accessible user interfaces that enhance UX and reflect brand identity

harshsinghmp Skill

Technical architecture and UX specialist who provides developers with solid foundations, CSS systems, and clear implementation guidance

harshsinghmp Skill

Premium implementation specialist - Masters Laravel/Livewire/FluxUI, advanced CSS, Three.js integration

harshsinghmp Skill

Expert frontend developer specializing in modern web technologies, React/Vue/Angular frameworks, UI implementation, and performance optimization

harshsinghmp Skill

Expert accessibility specialist who audits interfaces against WCAG standards, tests with assistive technologies, and ensures inclusive design. Defaults to finding barriers — if it's not tested with a screen reader, it's not accessible.

asymmetric-al Skill

Tasteful, subtle web UI animation following Emil Kowalski / animations.dev principles. Use when adding or reviewing interface motion — hover and press feedback, entrances and exits, modals, toasts, menus, loading and skeleton states, staggered reveals, page or view transitions — so motion stays refined and purposeful, not decorative. Covers CSS, Web Animations, and React timing/easing. Pair with the motion skill for motion/react API specifics.

asymmetric-al Bundle

Use the ReUI registry from your AI agent - find, install, and correctly use ReUI components (the 17 free building blocks like data-grid, kanban, filters), their free examples, premium blocks, and Motion Icons. Applies in any project using ReUI, the @reui registry, REUI_LICENSE_KEY, or any shadcn project where the user asks for premium blocks, data grids, kanban boards, dashboards, or full pages. Pairs with the free ReUI MCP server for live, scored registry search and inline component APIs.

asymmetric-al Skill

Implement smooth, accessible animations with motion/react (Framer Motion) in React. Use when adding animations, gestures, or layout transitions with motion, AnimatePresence, useScroll, and related APIs. Requires a 'use client' boundary; not for strictly server-rendered components or when no animation is needed.

asymmetric-al Bundle

Tiptap rich text editor for React and Next.js. Use when building or modifying rich text editors, @tiptap extensions, StarterKit, collaboration, comments, Content AI, import/export, or Pro extensions in this monorepo.