Coding standards, frameworks, refactoring, and code review (17.7K skills)
Use this skill as a Java 17+ coding reference for Spring Boot services. It explains naming, immutable data, Optional and Stream usage, meaningful exceptions, type-safe generics, project layout, logging, null handling, and testing expectations.
Apply backend patterns to Node.js, Express, and Next.js API routes. The guidance covers REST design, separating business logic from data access, database query efficiency, caching, authentication, rate limits, error handling, background jobs, and structured logs.
Select and install skills and rules from Everything Claude Code at the user or project level. The guided workflow checks installed files and path references, reports missing dependencies, and can tailor the installed materials to a project's stack.
Apply common patterns when building Java Spring Boot backends, from REST controllers and layered services to repositories, validation, caching, asynchronous work, and logging. The examples also cover error handling, pagination, rate limiting, and resilient external calls.
Use this skill for React and Next.js interface work. It provides code examples for reusable components, custom hooks, shared state, data fetching, validated forms, rendering performance, lazy loading, animations, error handling, and accessible keyboard and focus behavior.
Add a file cache for costly work such as PDF parsing, text extraction, or image analysis. It uses SHA-256 content hashes, so moving a file can still reuse its result, while changed content triggers fresh processing.
Use this skill when writing, reviewing, or refactoring modern C++ code. It applies C++ Core Guidelines to choices such as resource ownership, type safety, interfaces, errors, concurrency, templates, and standard library use, with concrete rules and examples.
Use this skill to design or review REST APIs. It covers resource URLs, HTTP methods and status codes, pagination, filtering, sorting, error responses, authentication, rate limits, and versioning, with patterns for consistent endpoint contracts.
Apply JPA and Hibernate patterns in Spring Boot for entity mapping, relationships, repositories, transactions, auditing, pagination, indexing, and connection pools. The guidance also covers query tuning, including ways to prevent N+1 queries, and database migration practices.
Use this skill to structure Java Spring Boot backends, from REST controllers and service layers to Spring Data access. It offers examples for validation, error handling, caching, asynchronous work, logging, pagination, retries, rate limiting, and production configuration.
Use this skill as a practical reference for TypeScript, JavaScript, React, and Node.js code. It covers naming, readable structure, immutability, error handling, API design, performance, testing, and common code smells to guide reviews and refactoring.
Use this skill to write or review Java 17+ code for Spring Boot services. It gives practical conventions for naming, immutability, Optional, streams, exceptions, generics, and project structure, with maintainability and clear intent as priorities.
Use this skill to structure Django applications and design Django REST Framework APIs. It covers models, serializers, viewsets, service layers, caching, signals, middleware, and ORM practices such as avoiding N+1 queries and using bulk operations.
Use this skill to write, review, or refactor modern C++ code with guidance based on the C++ Core Guidelines. It covers safer types, resource ownership, errors, concurrency, templates, and standard library choices, helping keep code consistent and clear.
Design a file cache that identifies inputs by SHA-256 content, so results from costly work such as PDF parsing or image analysis can be reused after files move or are renamed. Changed content gets a new cache key, while cache handling stays separate from processing functions.
Explore ways to run Claude Code through repeatable development loops, from simple command pipelines to persistent sessions, parallel agents, CI-backed pull requests, and RFC-driven task graphs. The skill explains when each pattern fits and how to manage context, reviews, and stopping conditions.
Run formatters and linters after each file edit, then delegate remaining violations to a Claude subprocess for repair and verification. The hooks also protect linter configuration files and support several languages and file formats.
Use this example as a template for a project-specific skill that helps an agent work within a particular application. It demonstrates how to document architecture, file layout, coding patterns, testing expectations, and deployment steps for consistent project work.
Use this skill to design or review REST APIs, including resource URLs, HTTP methods and status codes, pagination, filtering, errors, versioning, and rate limits. It helps make endpoint behavior and response formats consistent for clients and developers.
Choose which Everything Claude Code skills and rules to install for a user or project. The guide copies the selected files, checks paths and cross references, reports problems, and can tailor installed content to the project.
Apply practical patterns for React and Next.js interfaces, covering component composition, state management, data fetching, forms, accessibility, and performance techniques such as memoization, lazy loading, and list virtualization.
Use this skill to make practical PostgreSQL choices for queries, schema design, indexes, row-level security, and connection settings. It provides quick reference patterns and SQL checks for slow queries, missing foreign-key indexes, and table bloat.
Use these Python patterns when writing, reviewing, or refactoring code. The guide explains readable idioms, type hints, error handling, resource management, generators, concurrency, package structure, and common anti-patterns to help shape maintainable applications.
Use practical server-side patterns for Node.js, Express, and Next.js APIs. Get guidance on API structure, database queries, caching, authentication, error handling, rate limits, and background jobs when building maintainable services.