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Found 1,342 Skills
Use when the user asks to generate, create, or write unit tests for code. Analyzes the target code, produces a structured test case list for review, then generates test code. Supports Java (JUnit 5, Mockito, AssertJ).
Bun JavaScript/TypeScript runtime and all-in-one toolkit. Covers runtime, package manager, bundler, test runner, HTTP server, WebSockets, SQLite, S3, Redis, file I/O, shell scripting, FFI, Markdown parser. Keywords: bun, bunx, bun install, bun run, bun test, bun build, Bun.serve, Bun.file, bun:sqlite, Bun.markdown.
Expert guidelines for building performant animations with Motion (formerly Motion One) vanilla JavaScript animation library
Chai assertion library for JavaScript. Use for JS assertions.
Provides implementation patterns for Clean Architecture, Hexagonal Architecture (Ports & Adapters), and Domain-Driven Design in Java 21+ Spring Boot 3.5+ applications. Use when structuring layered architectures, separating domain logic from frameworks, implementing ports and adapters, creating entities/value objects/aggregates, or refactoring monolithic codebases for testability and maintainability.
Develop custom WebF native plugins based on Flutter packages. Create reusable plugins that wrap Flutter/platform capabilities as JavaScript APIs. Use when building plugins for native features like camera, payments, sensors, file access, or wrapping existing Flutter packages.
IntelliJ-IDEA MCP provides powerful IDE features including running tests, code analysis, refactoring, search, and project navigation. Use this when you need accurate Java code analysis (avoiding LSP false positives), running tests via IDEA configurations, refactoring symbols, or exploring codebase structure. Key commands: execute_run_configuration (run tests), get_file_problems (accurate errors/warnings), search_in_files_by_text (search code), list_directory_tree (view structure), get_file_text_by_path (read files), rename_refactoring (safe refactoring), execute_terminal_command (run shell commands).
Write TypeScript and JavaScript code like a top engineer using functional programming principles. Use when writing new code, reviewing existing code, or refactoring TS/JS projects. Applies pure functions, immutability, function composition, higher-order functions, declarative style, and avoiding shared state using native patterns only (no external libraries). Always analyzes the existing codebase first to understand patterns and conventions before making changes or suggestions.
Use when writing or reviewing Java unit tests. Enforces Mockito/JUnit 5 best practices - strict stubbing, no lenient mode, specific matchers, complete flow stubbing, Arrange-Act-Assert structure, and clear test naming.
Guide for migrating a project from Prettier or Biome to Oxfmt. Use when asked to migrate, convert, or switch a JavaScript/TypeScript project's formatter from Prettier or Biome to Oxfmt.
SLF4J - Simple Logging Facade for Java. Standard logging API that abstracts underlying implementation (Logback, Log4j2). Provides parameterized logging and MDC support. USE WHEN: user mentions "slf4j", "java logging api", "parameterized logging", asks about "how to log in Java", "logger facade", "MDC in java", "logging best practices java" DO NOT USE FOR: Logback configuration - use `logback` instead, Log4j2 configuration - use Log4j2 skill, Node.js logging - use `winston` or `pino` instead, Python logging - use `python-logging` instead
Prevent Ethereum hashing bugs in JavaScript and TypeScript. Node's sha3-256 is NIST SHA3, not Ethereum Keccak-256, and silently breaks selectors, signatures, storage slots, and address derivation.