Coding standards, frameworks, refactoring, and code review (17.8K skills)
Use this skill to write or review Java 17+ code in Spring Boot services. It offers conventions for naming, immutability, Optional, streams, exceptions, generics, null handling, logging, and project structure to keep code clear and maintainable.
Build a local persistence layer in Swift with an actor, an in-memory cache, and file storage. The patterns show how to serialize access to shared data, save changes atomically, and use the repository from an observable view model.
Use this skill when writing, reviewing, or refactoring Go code. It offers idiomatic patterns for error handling, concurrency, interfaces, package organization, and performance, helping guide code toward clear and maintainable applications.
Use this skill to design data models and repositories with JPA and Hibernate in Spring Boot. It covers entity relationships, query tuning, transactions, auditing, indexes, pagination, connection pools, caching, migrations, and data access testing.
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.
Use this skill when writing, reviewing, or refactoring Python. It covers readable idioms, type hints, error handling, resource management, generators, concurrency, package layout, performance, and common tools for formatting and static checks.
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.
Observe Claude Code prompts and tool activity through hooks, then record repeated behaviors as small learned rules called instincts, each with confidence and evidence. Group related instincts into reusable skills, commands, or agents, and import or export them.
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.
Use practical PostgreSQL patterns for schema design, SQL queries, indexing, row-level security, connection pooling, and performance troubleshooting. The quick reference includes data type guidance, query examples, anti-pattern checks, and configuration snippets based on Supabase practices.
Apply practical coding guidelines to TypeScript, JavaScript, React, and Node.js projects. The examples cover readable naming, immutability, type safety, component structure, API validation, performance, tests, and common code smells to help keep code easier to maintain.
Use this skill to adopt Swift 6.2 concurrency in apps and scripts. It explains actor isolation, MainActor protocol conformances, and how to move CPU-heavy work off an actor with @concurrent, including incremental migration guidance.
Use this skill when writing, reviewing, or refactoring Go code. It offers practical guidance on idiomatic patterns for error handling, concurrency, interfaces, package and type design, performance, and Go’s formatting and analysis tools.
Structure server-side applications with practical patterns for REST and GraphQL APIs, data access, caching, authentication, error handling, and background jobs. Examples focus on Node.js, Express, and Next.js API routes, including query optimization and request middleware.
Guide Spring Boot data modeling and persistence with JPA/Hibernate. Get practical patterns for entity relationships, repository queries, transaction boundaries, pagination, indexes, auditing, caching, and connection pools, with advice for reducing N+1 queries and validating data access.
Extract reusable patterns from Claude Code sessions when they end, such as error fixes, workarounds, debugging methods, and project conventions. Configure a stop hook and settings that save useful patterns as learned skills for later sessions.
Select Everything Claude Code skills and rules for a user or project installation. The workflow copies the chosen files, checks paths and dependencies, reports issues with suggested fixes, and optionally adapts installed content to project conventions.
Build SwiftUI interfaces with practical patterns for state management, reusable views, navigation, and rendering performance. It explains when to use Observation property wrappers, how to structure view models, and how to avoid costly work during view updates.
Design testable Swift code by placing file, network, and external API dependencies behind small protocols. Inject mock implementations to test expected behavior and error paths with Swift Testing, without relying on real I/O.
Create a thread-safe local persistence layer in Swift using actors, an in-memory cache, and file storage. The skill explains a reusable repository pattern for Codable and Identifiable models, atomic writes, async access, and integration with an observable view model.
Use this skill to guide TypeScript, JavaScript, React, and Node.js work with shared coding conventions. It covers readable naming, types, error handling, API design, project structure, performance, testing, and common code smells to review or refactor.
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.
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.