Backend

Progressive four-tier URL content scraping with automatic fallback strategy.USE WHEN user says "scrape this URL", "fetch this page", "get content from","can't access this site", "use Bright Data", "pull content from URL",or needs to retrieve web content that may have bot detection or access restrictions.

Fetch up-to-date library documentation directly into context to prevent hallucinated APIs and outdated code examples. Use when user says "use docs", "fetch docs for [library]", "check [library] docs", or asks about a library's API, methods, or usage patterns and current documentation would be helpful. Also use proactively when generating code for libraries where version-specific accuracy matters.

RPA workflow testing with Playwright browser automation. Covers page object model, wait strategies, screenshot testing, and browser node testing patterns. Use when: testing browser nodes, page object model, wait strategies, screenshot testing, visual regression, browser automation tests.

Use this skill whenever the user wants to design, implement, or refactor authentication and authorization in a Hono + TypeScript backend, including JWT, sessions/cookies, middleware, guards-like patterns, and route protection for Node/Edge/Workers runtimes.

Fetch and display filtered X (Twitter) timeline based on your interests. Shows AI/ML research, developer tools, and technical content while filtering out noise, rage bait, and irrelevant posts. Uses Claude Haiku to score relevance against your objectives.

Comprehensive Spring Framework and Spring Boot best practices including dependency injection patterns, bean lifecycle and scopes, REST API development, Spring Data JPA, service layer design, Spring Security, testing strategies, caching, AOP, async processing, error handling, and common anti-patterns. Essential reference for code reviews and Spring Boot application development.

Define and structure database models with proper naming conventions, data integrity constraints, and relationship definitions. Use this skill when creating or modifying database model files, defining table schemas, setting up model relationships (one-to-many, many-to-many, one-to-one), working with ORM model files (schema.prisma, models/*, app/models/*, entities/*), implementing data validation at the model level, adding timestamps and audit fields, defining foreign keys and indexes, choosing appropriate data types, configuring cascade behaviors, or balancing database normalization with query performance. Apply this skill when designing database schemas, creating new models, refactoring existing model structures, or reviewing data integrity and relationship configurations.

Deploy containerized web applications to any Linux server using Kamal. Use when users need to deploy, configure, debug, or manage Kamal deployments including initial setup, configuration of deploy.yml, deployment workflows, rollbacks, managing accessories (databases, Redis), troubleshooting deployment issues, or understanding Kamal commands and best practices.

Diagnose and fix FastAPI hangs caused by blocking ThreadPoolExecutor shutdown in the news stream route; includes py-spy capture and non-blocking executor pattern.

Expert in Shelby Protocol TypeScript SDK for decentralized storage on Aptos. Helps with blob uploads/downloads, session management, micropayment channels, multipart uploads, and SDK integration for Node.js and browser environments. Triggers on keywords ShelbyNodeClient, ShelbyClient, @shelby-protocol/sdk, Shelby SDK, decentralized blob storage, Shelby upload, Shelby download, Shelby session.

Configure organization-level GitHub Apps for secure cross-repository automation. Machine identity, audit trails, and enterprise-grade authentication.

识别项目技术栈、测试框架和环境依赖，为 Compile ExecSpec 提供基础上下文。当需要编译 ExecSpec 前，识别项目类型（Node/Python/Go）、测试框架（Jest/Pytest/RSpec）、环境变量依赖（dotenv/os.getenv）时使用。

Comprehensive Django best practices covering project structure, models (field choices, Meta options, managers, QuerySets, migrations), views (CBVs vs FBVs, generic views), Django REST Framework (serializers, ViewSets, permissions), forms, templates, security (CSRF, XSS, SQL injection), performance (N+1 queries, select_related, prefetch_related, caching), testing, and common anti-patterns. Essential reference for Django code reviews and development.

Filament 4.x coding standards for Laravel 12. Custom Schema namespace (NOT Form), Vietnamese UI, Observer patterns, Image management. USE WHEN creating resources, fixing namespace errors, implementing forms, RelationManagers, Settings pages, or any Filament development.

Comprehensive Ruby and Rails code review using Sandi Metz rules and SOLID principles. Automatically runs rubycritic and simplecov, analyzes changed files in current branch vs base branch, identifies OOP violations, Rails anti-patterns, security issues, and test coverage gaps. Outputs REVIEW.md with VSCode-compatible file links. Use when reviewing Ruby/Rails code, conducting code reviews, checking for design issues, or when user mentions code review, pull request review, or code quality analysis.

Create feature-rich PHP enums following Laravel conventions with SCREAMING_SNAKE_CASE case names, backed enum values (string or int), helper methods for labels and comparisons, validation rules, and comprehensive Pest tests. Use this skill when converting hardcoded strings or magic numbers to type-safe enums, creating categorical data types like statuses, types, roles or categories, adding enum-based validation to forms or APIs, refactoring magic strings into structured types, or defining a fixed set of allowed values in your application. This skill applies when working on files in app/Enums/ directory, creating enum classes, adding enum casts to models, or implementing enum validation rules.

UseCase 설계, Transaction 경계 관리, CQRS 적용. @Transactional 내 외부 API 호출 금지. /kb-application 명령 시 자동 활성화.

Add comprehensive validation to Django models using validators, clean methods, and constraints. Use when implementing model validation, business rules, or data integrity checks.

Your approach to handling API design. Use this skill when working on files where API design comes into play.

Skill for PHP/Laravel backend development following project conventions. Use when creating or editing PHP code, models, services, controllers, tests, or any backend logic. Loads all backend rules from .claude/rules/backend/ and .claude/rules/dataclasses/.