TDD実装ワークフロー for Next.js projects. Use when "実装して", "機能追加", "コンポーネント作成", "ページ作成", "機能を作って", implementing features, creating components, or building pages.

NestJS best practices and architecture patterns for building production-ready applications. This skill should be used when writing, reviewing, or refactoring NestJS code to ensure proper patterns...

Vue.js performance optimization guidelines for building fast, maintainable applications. This skill should be used when writing, reviewing, or refactoring Vue.js code to ensure optimal performance...

Optimize user CLAUDE.md files by applying progressive disclosure principles. This skill should be used when users want to reduce CLAUDE.md bloat, move detailed content to references, extract...

Use Laravel-specific vocabulary—Eloquent patterns, Form Requests, API resources, jobs/queues—to get idiomatic framework code

Laravel + Inertia.js + React integration patterns. Use when building Inertia page components, handling forms with useForm, managing shared data, or implementing persistent layouts. Triggers on...

XGBoost machine learning best practices for training, tuning, and deploying gradient boosted models. Use when writing, reviewing, or implementing XGBoost models for classification, regression, or...

This skill reviews the current chat session and GitHub Copilot instructions to identify user-reported issues that should become new lessons, detect violations of existing instructions, and update...

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Testing best practices for the frontend. Emphasizes E2E tests over unit tests, minimal mocking, and testing behavior over implementation details. Use when writing tests or reviewing test code.

Audit Web Audio API code for sound synthesis best practices. Use when reviewing procedural audio, implementing UI sounds, or checking audio parameter quality. Outputs file:line findings.

Audit Motion/Framer Motion code for AnimatePresence best practices. Use when reviewing exit animations, modals, or presence state. Outputs file:line findings.

Audit UI code for audio feedback best practices. Use when reviewing sound implementation, checking audio UX decisions, or auditing accessibility. Outputs file:line findings.

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Produces practical, risk-based testing guidance and minimal test plans for features or changes. Use when user asks what to test, how to pick test cases (boundaries, permissions, state machines),...

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Assess data quality with checks for missing values, duplicates, type issues, and inconsistencies. Use for data validation, ETL pipelines, or dataset documentation.

SELinux management on Rocky Linux 8/9 including modes, file contexts, booleans, port labeling, and troubleshooting with audit2why/audit2allow. Use when troubleshooting permission denials,...

Configure DigitalOcean Managed MySQL, MongoDB, Valkey, Kafka, and OpenSearch for App Platform. Use when setting up non-PostgreSQL databases, configuring trusted sources, or troubleshooting...

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...