Implement logging in B2C Commerce scripts using dw.system.Logger. Use when adding debug output, error tracking, or custom log files to server-side code. Covers getLogger, log categories, log levels (debug, info, warn, error, fatal), and custom named log files.

Retrieve and monitor log files from B2C Commerce instances. Use when fetching recent errors, searching log entries, filtering by level/time, or real-time tailing. The `logs get` command is optimized for coding agents with JSON output.

Create and manage on-demand sandboxes (ODS). Use when provisioning development instances, starting/stopping sandboxes, checking sandbox status, or managing sandbox lifecycle. Only create or delete sandboxes when explicitly requested.

Browse and retrieve SCAPI OpenAPI schemas. Use when exploring available SCAPI endpoints, checking API request/response formats, understanding SCAPI data models, or finding the right API for a task.

Work with site archive structure and metadata XML patterns. Use when adding custom attributes, system object extensions, site preferences, or understanding import/export XML schemas. Covers directory structure and XML file formats for site archives.

List and inspect storefront sites on B2C Commerce instances. Use when finding site IDs, checking site configuration, or listing available sites. Helpful for determining site context when running other commands.

Manage SLAS (Shopper Login and API Access Service) clients. Use when configuring shopper authentication, creating API clients for PWA/headless, managing OAuth scopes (including custom scopes like c_loyalty), or debugging token issues.

List, upload, download, and manage files on B2C Commerce instances via WebDAV. Use when reading error logs (customerror, debug), downloading job logs, uploading to IMPEX directories, or managing files in cartridges/catalogs/static folders.

Generate Babel configuration files for JavaScript transpilation with appropriate presets and plugins.

Generates Babel configuration for JavaScript transpilation in tests. Creates babel.config.js file.

Specifies the correct Babel configuration for NativeWind to ensure proper processing and avoid conflicts.

Transforms markdown files into brand-compliant BAC HTML presentations with professional styling, proper typography, and integrated branding. Supports manual browser-based PDF export.

Test software in the style of James Bach, pioneer of exploratory testing and context-driven testing. Emphasizes skilled human investigation, heuristics-based test design, and adapting to context rather than following rigid scripts. Use when designing test strategies, performing exploratory testing, or building thinking testers.

Comprehensive backend development guidelines covering API design, database patterns, security, performance, and production-ready code standards.

backend-annotations

Generate production-ready Saloon-based API integrations for Laravel projects including connector classes, request classes, readonly DTOs, service layer methods with comprehensive error handling, and complete Pest test suites. Use this skill when integrating external APIs using Saloon, creating API request/response handlers, adding new API endpoints to existing services, building API client wrappers for third-party services, or setting up API communication with proper error handling and testing. This skill applies when working on files in app/Services/Api/, app/DataTransferObjects/Api/, creating Saloon connectors and requests, implementing API service methods, or writing API integration tests.

Backend and API implementation patterns for scalability, security, and maintainability. Use when building APIs, services, and backend infrastructure.

Design and implement RESTful API endpoints with proper HTTP methods, status codes, and consistent naming conventions. Use this skill when creating or modifying API routes, endpoints, or server-side request handlers. When working on files in src/pages/api/, files containing API route definitions, files implementing REST endpoints, files handling HTTP requests and responses, server middleware for API requests, API authentication and authorization logic, and files defining API versioning strategies. When designing URL structures for resources, implementing query parameter handling for filtering/sorting/pagination, setting up rate limiting for API endpoints, or configuring CORS and API security headers.

Expert backend architect specializing in scalable API design,

Your approach to handling backend async operations. Use this skill when working on files where backend async operations comes into play.

Master Python asyncio, concurrent programming, and async/await patterns for high-performance FastAPI applications. Use when building async APIs, concurrent systems, or I/O-bound applications requiring non-blocking operations.

Bootstraps complete backend with Apso, including API setup, database configuration, and testing. Triggers when user needs to create backend, setup API, or initialize server.

backend-bugfix

Ensure backend build readiness for Espresso Engineered. Use when backend code/config changes are made or when a feature/task is wrapping up to suggest running `npm run build:backend` (and tests only if requested).

Kotlin backend layering and packaging guidelines

Conduct systematic backend code reviews to identify security vulnerabilities, performance bottlenecks, code quality issues, and architectural concerns. Produces actionable reports with specific locati

Expert backend development guidance covering Node.js, Python, Java, Go, API design (REST/GraphQL/gRPC), database patterns, authentication, caching, message queues, microservices, and testing. Produces production-ready, scalable, and secure backend code with industry best practices. Use when building APIs, implementing business logic, designing data models, integrating services, or when users mention backend development, server-side code, APIs, databases, or microservices.

Use when editing C# backend files (.cs) in src/Backend/, src/Platform/, or src/PlatformExampleApp/. Provides CQRS patterns, repository patterns, validation patterns, entity patterns, background jobs, message bus consumers, data migrations, and fluent helpers for EasyPlatform .NET 9 development.

Process vehicle insurance Excel data using Pandas - file handling, data cleaning, merging, validation. Use when processing Excel/CSV files, handling data imports, implementing business rules (negative premiums, zero commissions), debugging data pipelines, or optimizing Pandas performance. Keywords: data_processor.py, Excel, CSV, Pandas, merge, deduplication, date normalization.

Systematic approach to diagnose and resolve backend service issues including dependency conflicts, database schema mismatches, import errors, and middleware configuration problems in FastAPI applications.

Systematic debugging for Encore.ts backend incidents using diagnostic scripts, database queries, and structured logging. Use when backend tests fail, services crash, or async flows stall.

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

**Deep research-driven skill for finding optimal backend architectures and patterns.**

Conducts comprehensive backend design reviews covering API design quality, database architecture validation, microservices patterns assessment, integration strategies evaluation, security design review, and scalability analysis. Evaluates API specifications (REST, GraphQL, gRPC), database schemas, service boundaries, authentication/authorization flows, caching strategies, message queues, and deployment architectures. Identifies design flaws, security vulnerabilities, performance bottlenecks, and scalability issues. Produces detailed design review reports with severity-rated findings, architecture diagrams, and implementation recommendations. Use when reviewing backend system designs, validating API specifications, assessing database schemas, evaluating microservices architectures, reviewing integration patterns, or when users mention backend design review, API design validation, database design review, microservices assessment, or backend architecture evaluation.

Unified backend development skill covering API design (REST/GraphQL/tRPC), TypeScript expertise, data analysis, and code optimization principles. Use for backend architecture, API patterns, type issues, data processing, and code quality.

Comprehensive backend development workflow that orchestrates expert analysis, architecture design, implementation, and deployment using the integrated toolset. Handles everything from API design and database architecture to security implementation and DevOps automation.

Senior Backend Developer with 10+ years Java and 5+ years Spring Boot experience. Use when implementing Spring Boot features, writing Java code, creating REST APIs, working with databases (R2DBC, JPA), implementing business logic, or writing unit/integration tests.

Backend Developer Agent. 코드 개발, 디버깅, 기능 구현을 담당합니다. 개발, 코딩, 디버그(debug), 버그 수정, 기능 구현 관련 요청 시 사용됩니다.

Orchestrate end-to-end backend feature development from requirements to deployment. Use when coordinating multi-phase feature delivery across teams and services.

Production backend systems development. Stack: Node.js/TypeScript, Python, Go, Rust | NestJS, FastAPI, Django, Express | PostgreSQL, MongoDB, Redis. Capabilities: REST/GraphQL/gRPC APIs, OAuth 2.1/JWT auth, OWASP security, microservices, caching, load balancing, Docker/K8s deployment. Actions: design, build, implement, secure, optimize, deploy, test APIs and services. Keywords: API design, REST, GraphQL, gRPC, authentication, OAuth, JWT, RBAC, database, PostgreSQL, MongoDB, Redis, caching, microservices, Docker, Kubernetes, CI/CD, OWASP, security, performance, scalability, NestJS, FastAPI, Express, middleware, rate limiting. Use when: designing APIs, implementing auth/authz, optimizing queries, building microservices, securing endpoints, deploying containers, setting up CI/CD.

Generate production-ready REST or GraphQL endpoints with request validation, error handling, and comprehensive tests.

Build robust backend systems with modern technologies (Node.js, Python, Go, Rust), frameworks (NestJS, FastAPI, Django), databases (PostgreSQL, MongoDB, Redis), APIs (REST, GraphQL, gRPC), authentication (OAuth 2.1, JWT), testing strategies, security best practices (OWASP Top 10), performance optimization, scalability patterns (microservices, caching, sharding), DevOps practices (Docker, Kubernetes, CI/CD), and monitoring. Use when designing APIs, implementing authentication, optimizing database queries, setting up CI/CD pipelines, handling security vulnerabilities, building microservices, or developing production-ready backend systems.

Design and implement robust, production-grade backend systems with strong architecture, correctness, performance, and operational rigor. Use this skill when the user asks to build APIs, services, data pipelines, system architectures, or backend-heavy applications.

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.

Backend typed error handling and boundary mapping

Ultimate 25+ years expert-level backend skill covering FastAPI, Express, Node.js, Next.js with TypeScript. Includes ALL databases (PostgreSQL, MongoDB, Redis, Elasticsearch), ALL features (REST, GraphQL, WebSockets, gRPC, Message Queues), comprehensive security hardening (XSS, CSRF, SQL injection, authentication, authorization, rate limiting), complete performance optimization (caching, database tuning, load balancing), ALL deployment strategies (Docker, Kubernetes, CI/CD), advanced patterns (microservices, event-driven, saga, CQRS), ALL use cases (e-commerce, SaaS, real-time, high-traffic), complete testing (unit, integration, E2E, load, security). Route protection, middleware, authentication implementation in PERFECTION. Use for ANY backend system requiring enterprise-grade security, performance, scalability, and architectural excellence.

Scaffolds backend features including new domain entities, new properties on existing entities, and new business operations. Use when creating a new domain entity, extending an existing entity with new properties, or adding new business features/commands.

Enforces Go backend best practices following clean architecture, dependency injection, and test-driven development. Automatically applied for Go backend implementation, API development, and microservices construction.

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

Find and fix API performance bottlenecks.