Frontend

Comprehensive shadcn/ui component library with theming, customization patterns, and accessibility. Use when building modern React UIs with Tailwind CSS. IMPORTANT - Always use MCP server tools first when available.

Expert guidance for writing proper Svelte 5 code with runes-based reactivity. Use when writing Svelte 5 components, migrating from Svelte 4, or troubleshooting Svelte 5 syntax. Covers $state, $derived, $effect, $props, $bindable, event handling, snippets, TypeScript integration, and common pitfalls.

Portable tmux-based workflow to drive one or multiple long-running Codex CLI “workers” from another process (e.g. Claude CLI) by (1) starting/reusing a tmux session running `codex`, (2) injecting prompts into the Codex pane via `tmux send-keys`/buffer paste, and (3) polling the worker’s Codex JSONL session logs to extract the next assistant reply. Each worker runs with an isolated `CODEX_HOME` (default `~/.codex-workers/<worker_id>`) to prevent log cross-talk when multiple Codex workers run concurrently. Use when you need to submit/wait/read Codex replies in tmux, manage multiple Codex workers, or troubleshoot the tmux worker and log binding.

Builds UIs with SolidJS including signals, effects, memos, and fine-grained reactivity. Use when creating high-performance reactive applications, building without virtual DOM, or needing granular updates.

Use for SvelteKit 2 + Svelte 5 + Tailwind v4 projects. Keep SSR/client boundaries and Tailwind config consistent.

Comprehensive SaaS planning system for solo developers using Next.js + Supabase + Stripe stack. Converts ideas into shippable subscription products with scope control, feature prioritization, billing architecture, technical roadmap, and anti-feature-creep mechanisms. Generates PRDs with subscription models, pricing strategies, and Claude Code starter prompts. Use when planning SaaS products, subscription apps, or when user mentions billing, payments, recurring revenue, or subscription models.

Build, update, and troubleshoot AllayMC plugins in Java or other JVM languages. Use when creating a new AllayMC plugin, migrating an existing plugin to a new Allay API version, wiring commands/events/tasks/config, or setting up Gradle and plugin metadata (plugin.json or AllayGradle plugin block).

Use the Svelte MCP server tools for Svelte 5 and SvelteKit documentation, code analysis, and playground links

Complete knowledge domain for Cloudflare Vectorize - globally distributed vector database for buildingsemantic search, RAG (Retrieval Augmented Generation), and AI-powered applications.Use when: creating vector indexes, inserting embeddings, querying vectors, implementing semantic search,building RAG systems, configuring metadata filtering, working with Workers AI embeddings, integratingwith OpenAI embeddings, or encountering metadata index timing errors, dimension mismatches, filtersyntax issues, or insert vs upsert confusion.Keywords: vectorize, vector database, vector index, vector search, similarity search, semantic search,nearest neighbor, knn search, ann search, RAG, retrieval augmented generation, chat with data,document search, semantic Q&A, context retrieval, bge-base, @cf/baai/bge-base-en-v1.5,text-embedding-3-small, text-embedding-3-large, Workers AI embeddings, openai embeddings,insert vectors, upsert vectors, query vectors, delete vectors, metadata filtering, namespace filtering,topK

Expert guidance for creating stunning, professional 2025 UI designs using Tailwind CSS and shadcn/ui. Ensures clean minimal aesthetics, 8px grid consistency, mobile-first responsive patterns, and WCAG accessibility compliance. Use when designing interfaces, reviewing UI, creating components, or when visual design needs modern professional standards.

Next.js 16 migration guide (async request APIs, "use cache", Turbopack)

Provides architectural guidance and design patterns for implementing new features in the Nick Stack codebase. Use when planning implementations, designing new features, or making architectural decisions.

カリキュラムからレッスン番号を指定してJavaScript学習教材のmdファイルを生成する。ユーザーが「レッスンXXの教材を作成して」と依頼したときに使用する。

Master error handling patterns across languages including exceptions, Result types, error propagation, and graceful degradation to build resilient applications. Use when implementing error handling, designing APIs, or improving application reliability.

3D graphics and WebGPU/WebGL rendering with Composable Svelte. Use when building 3D scenes, working with cameras, lights, meshes, materials, or implementing WebGPU/WebGL graphics. Covers Scene, Camera, Light, Mesh components, geometry types (box, sphere, cylinder, torus, plane), material properties, and state-driven 3D rendering.

Audit an entire Canvas LMS course against the Four Learning Design Pillars (Clear Structure, Active Content, Continuous Practice, Intuitive UX). Use when users want to evaluate course quality, identify improvement areas, or prepare for course redesign. Requires canvas-mcp server for course data access. Triggers on "audit course", "course review", "evaluate my course", or Canvas course IDs/codes.

Generate comprehensive form validation logic for React forms with TypeScript. Use when creating signup/login forms, input validation, or user data collection. Includes email regex, password strength, required fields, and error handling.

This skill should be used when estimating development time for Jira tickets. It provides both manual and AI-assisted estimates with T-shirt sizes, story points, and phase-by-phase time breakdowns based on task type classification, complexity scoring, and project architecture (monolithic/serverless/frontend/fullstack/mobile/test_automation).

Expert Svelte/SvelteKit development assistant for building components, utilities, and applications. Use when creating Svelte components, SvelteKit applications, implementing reactive patterns, handling state management, working with stores, transitions, animations, or any Svelte/SvelteKit development task. Includes comprehensive documentation access, code validation with svelte-autofixer, and playground link generation.

Use when you need to achieve any emotional outcome through animation—provides a framework for mapping Disney principles to any target emotion.