Frontend

Implement JWT custom claims authentication for Supabase to reduce API database queries. Use when building Next.js API routes that need user authentication and authorization (role, company_id, facility_id). Embeds user metadata into JWT tokens to eliminate 40% of database queries per API request. Triggers when implementing authentication in API routes, optimizing Supabase queries, or setting up user session management.

Guide experienced developers through REFACTOR phase of TDD cycle - improving code quality while maintaining green tests

Material 3 Expressiveガイドラインに沿ったUI実装を提供するスキル。Jetpack Composeで画面やコンポーネントを作成する際に使用。MotionScheme、新しいExpressiveコンポーネント、テーマ設定のパターンを提供。

Set up custom Claude Code status line with Nerd Font icons, colors, git status, usage tracking, system info, and project context. NO EMOJIS - only Nerd Font icons and symbols. Use when configuring statusline, setting up status bar, or customizing Claude UI. Triggers with statusline, status bar, custom theme.

Converts hierarchical legislative text from Word documents into a flat list of requirements. Use when processing regulatory documents, compliance frameworks, or legal text that needs to be extracted into individual, numbered requirements for analysis or mapping.

Professional design methodology for building modern, premium interfaces with client branding. Use for ALL client work and non-AICA projects. Applies glassforium logic, cinematic polish, and intentional design principles while adapting to client colors and brand identity. For Kelvin's personal AICA brand (black glass + gold), use the 'aica' skill instead.

Security auditing for Rust/WebAssembly applications. Identifies vulnerabilities,reviews unsafe code, validates input handling, and ensures secure defaults.Follows OWASP guidelines and Rust security best practices.

Expert guidance for creating and working with marimo notebooks - reactive Python notebooks that can be executed as scripts and deployed as apps. Use when the user asks to create marimo notebooks, convert Jupyter notebooks to marimo, build interactive dashboards or data apps with marimo, work with marimo's reactive programming model, debug marimo notebooks, or needs help with marimo-specific features (cells, UI elements, reactivity, SQL integration, deploying apps, etc.).

Evidence-based UI design system from Practical UI by Adham Dannaway. Use when designing interfaces, reviewing UI, creating mockups, building components, or applying design principles. Covers visual hierarchy, spacing systems, color palettes, typography scales, form design, button patterns, accessibility (WCAG 2.1 AA), and reducing cognitive load. Triggers on UI design, interface design, component design, design system, accessibility, WCAG, visual hierarchy, spacing, typography, color palette, forms, buttons, or layout questions.

Create and maintain Roslyn source generators for compile-time code generation. Use when building incremental generators, designing pipelines with ForAttributeWithMetadataName, creating marker attributes, implementing equatable models, testing generators, or debugging generator performance issues.

JavaScript project structure, package.json configuration, dependency management, and Maven integration standards for consistent project setup and builds

Align analysts and designers on the goals, requirements, and storytelling approach for a new or updated dashboard.

Systematic methodology for debugging bugs, test failures, and unexpected behavior.Use when encountering any technical issue before proposing fixes. Covers root causeinvestigation, pattern analysis, hypothesis testing, and fix implementation.Use ESPECIALLY when under time pressure, "just one quick fix" seems obvious, oryou've already tried multiple fixes. NOT for exploratory code reading.

A comprehensive skill for integrating the `better-auth` authentication framework into modern web applications. Use this skill for tasks involving user authentication, including setup, configuration, database integration, and implementing various auth methods like email/password, social logins, magic links, and passkeys, especially within a Next.js environment.

Comprehensive guide to iOS-native animations in React Native using Reanimated v4. Use when implementing animations, transitions, gestures, or motion design. Covers timing standards, spring physics, gesture handlers, and performance optimization for 60 FPS on iOS.

This skill should be used when the user asks "Chart.js React", "react-chartjs-2", "Chart.js Vue", "vue-chartjs", "Chart.js Angular", "ng2-charts", "Chart.js Rails", "Chart.js Rails 8", "Chart.js importmaps", "Chart.js Stimulus", "Chart.js Turbo", "Chart.js Hotwire", "Chart.js SSR", "Chart.js Next.js", "Chart.js Nuxt", or needs help integrating Chart.js v4.5.1 with frontend frameworks.

Master MongoDB integration in applications with Node.js, Python, and Java drivers. Learn connections, transactions, error handling, and best practices. Use when building applications with MongoDB.

「Clarity / Deference / Depth」と、1プロダクト=1焦点の構成・大きいタイポ・余白・最小CTAを抽象化して、Web UI設計に適用する。

Write secure, performant database queries using parameterization, proper indexing, and optimization techniques. When creating or modifying database query logic, data access layers, or repository files. When working on files that interact with databases using SQL, ORMs, or query builders. When implementing SELECT queries, joins, transactions, or data fetching logic. When optimizing queries to prevent N+1 problems, using eager loading, or implementing query caching. When writing parameterized queries to prevent SQL injection vulnerabilities.

Apply Model-First Reasoning (MFR) to code generation tasks. Use when the user requests "model-first", "MFR", "formal modeling before coding", "model then implement", or when tasks involve complex logic, state machines, constraint systems, or any implementation requiring formal correctness guarantees. Enforces strict separation between modeling and implementation phases.