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Found 1,261 Skills
Review or refactor React / Next.js code for performance and reliability using a prioritized rule library (waterfalls, bundle size, server/client data fetching, re-renders, rendering). Use when writing React components, Next.js pages (App Router), optimizing bundle size, improving performance, or doing a React/Next.js performance review.
Next Friday coding standards - naming conventions, code style, imports, types, React/JSX patterns, Next.js rules. Use when writing or reviewing TypeScript/React/Next.js code.
WHEN: User is writing HTML/templates with Tailwind CSS classes, styling components, configuring Tailwind themes, asking about Tailwind utilities or patterns, or working with any project that uses Tailwind CSS WHEN NOT: Non-Tailwind CSS questions, general HTML/CSS without Tailwind context, questions about other CSS frameworks (Bootstrap, etc.)
Expert knowledge of testing Node.js and Express applications including Jest configuration, Supertest for API testing, unit vs integration vs e2e testing, mocking external APIs, test organization, code coverage, CI/CD integration, and TDD practices. Use when writing tests, setting up testing framework, debugging test failures, or adding test coverage.
Velt Comments implementation patterns and best practices for React, Next.js, and web applications. Use when adding collaborative commenting features, comment modes (Freestyle, Popover, Stream, Text, Page), rich text editor comments (TipTap, SlateJS, Lexical), media player comments, or chart comments.
Playwright automation best practices for web scraping and testing. Use when writing or reviewing Playwright code, especially for element operations (click, fill, select), waiting strategies (waitForSelector, waitForURL, waitForLoadState), navigation patterns, and locator usage. Apply when encountering unstable tests, race conditions, or needing guidance on avoiding deprecated patterns like waitForNavigation or networkidle.
Provides templates, standards, and best practices for writing clear, comprehensive technical documentation
React and Next.js performance patterns. Use when writing, reviewing, or optimizing React components.
React testing best practices using React Testing Library, Vitest, and Jest. Use when writing, reviewing, or generating tests for React components, hooks, context providers, async interactions, or form submissions. Triggers on tasks like "write a test for this component", "add unit tests", "test this hook", "mock this API call", "improve test coverage", or "set up Vitest".
Refactors legacy Java code to modern patterns and best practices. Use when modernizing old Java code, converting to Java 8+ features, refactoring legacy applications, applying design patterns, improving error handling, extracting methods/classes, converting to streams/Optional/records, or migrating from old Java versions. Works with pre-Java 8 code, procedural Java, legacy frameworks, and outdated patterns.
Comprehensive vitest testing patterns covering test structure, AAA pattern, parameterized tests, assertions, mocking, test doubles, error handling, async testing, and performance optimization. Use when writing, reviewing, or refactoring vitest tests, or when user mentions vitest, testing, TDD, test coverage, mocking, assertions, or test files (*.test.ts, *.spec.ts).
Better Auth framework reference — configuration, security, rate limiting, sessions, plugins, and production hardening. Use when configuring Better Auth, auditing auth security, adding plugins, or troubleshooting Heartwood.