개발 스킬

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.

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• Design a REST API for a Spring Boot service
• Separate controller, service, and repository responsibilities
• Add caching or asynchronous processing

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Reviewing coding conventions for a project
• Improving TypeScript types and error handling
• Structuring React components and hooks

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.

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• Choosing indexes for common PostgreSQL query patterns
• Reviewing a database schema or SQL migration
• Investigating slow queries and table bloat

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Starting a new Go project
• Reviewing Go code for common pitfalls
• Refactoring packages or modules

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Setting Java conventions for a Spring Boot service
• Reviewing Optional and Stream usage
• Choosing exception and null-handling patterns

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Designing JPA entities and relationships
• Reducing N+1 queries and improving fetch plans
• Adding pagination, indexes, or audit fields

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Learning recurring preferences and workflows from sessions
• Viewing learned instincts with confidence scores
• Grouping related instincts into skills or commands

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Selecting skills and rules for an installation
• Installing components for one project or all projects
• Checking paths and references after installation

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Designing reusable React components
• Managing shared state and data fetching
• Validating form input

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Migrating a Swift 5 or 6.1 project
• Understanding data-race compiler errors
• Designing a MainActor-centered app

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Design REST endpoints for a service
• Separate business logic from database access
• Review database queries for inefficient patterns

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Writing a new Python module
• Reviewing code for clearer idioms
• Refactoring error handling and types

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Testing Swift code that reads or writes files
• Simulating network or API failures
• Building modules for apps and SwiftUI previews

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Choosing state wrappers for SwiftUI views
• Structuring a view model and data flow
• Building typed navigation with NavigationStack

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Starting a new C++ class or function
• Reviewing or refactoring a C++ codebase
• Choosing between language features and library types

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Storing app data locally in Swift
• Sharing mutable data safely across app tasks
• Adding offline-first local persistence

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Cache repeated PDF or image processing
• Add cache options to a command-line tool
• Reuse results after files are moved or renamed

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Setting conventions for a new module
• Reviewing code for readability and maintainability
• Refactoring code to follow shared patterns

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Choosing a loop structure for an automated development task
• Building sequential Claude Code steps with validation and cleanup
• Planning parallel agents for work described in an RFC

Help multi-agent workflows find the codebase context a subagent needs. Start with a broad search, judge which files are relevant, identify missing information, and refine the search for up to three cycles to keep the returned context focused.

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• Finding relevant files for a subagent's coding task
• Refining code searches when key context is missing
• Keeping retrieved context focused in a multi-agent workflow

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Choosing indexes for a query or time-series data
• Reviewing PostgreSQL schema and column types
• Checking slow queries and missing foreign-key indexes

Learn patterns for adding Apple’s FoundationModels to iOS 26+ apps. Generate text, return typed data with `@Generable`, let the model call custom tools, and stream partial results to the UI, while checking model availability and respecting the stated context limit.

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• Generating text in an iOS app
• Extracting structured data from user input
• Showing generated results as they arrive

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.

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• Creating project-specific guidance for an application
• Documenting a codebase’s architecture and file layout
• Recording project testing and deployment practices

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.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

• Writing a new C++ class or function
• Reviewing C++ code for safer practices
• Refactoring resource management