Use when SwiftData migrations crash, fail to preserve relationships, lose data, or work in simulator but fail on device - systematic diagnostics for schema version mismatches, relationship errors, and migration testing gaps

Use when implementing iOS 26 SwiftUI features - covers Liquid Glass design system, performance improvements, @Animatable macro, 3D spatial layout, scene bridging, WebView/WebPage, AttributedString rich text editing, drag and drop enhancements, and visionOS integration for iOS 26+

Use when separating logic from SwiftUI views, choosing architecture patterns, refactoring view files, or asking 'where should this code go', 'how do I organize my SwiftUI app', 'MVVM vs TCA vs vanilla SwiftUI', 'how do I make SwiftUI testable' - comprehensive architecture patterns with refactoring workflows for iOS 26+

Use when debugging SwiftUI view updates, preview crashes, or layout issues - diagnostic decision trees to identify root causes quickly and avoid misdiagnosis under pressure

Use when UI is slow, scrolling lags, animations stutter, or when asking 'why is my SwiftUI view slow', 'how do I optimize List performance', 'my app drops frames', 'view body is called too often', 'List is laggy' - SwiftUI performance optimization with Instruments 26 and WWDC 2025 patterns

Use when ANY beta tester reports a crash, ANY crash appears in Organizer or App Store Connect, crash logs need symbolication, app was killed without crash report, or you need to triage TestFlight feedback

TextKit 2 complete reference (architecture, migration, Writing Tools, SwiftUI TextEditor) through iOS 26

Guide to Xcode 26's Recording UI Automation feature for creating UI tests through user interaction recording.

Use when writing UI tests, recording interactions, tests have race conditions, timing dependencies, inconsistent pass/fail behavior, or XCTest UI tests are flaky - covers Recording UI Automation (WWDC 2025), condition-based waiting, network conditioning, multi-factor testing, crash debugging, and accessibility-first testing patterns

Use when CAAnimation completion handler doesn't fire, spring physics look wrong on device, animation duration mismatches actual time, gesture + animation interaction causes jank, or timing differs between simulator and real hardware - systematic CAAnimation diagnosis with CATransaction patterns, frame rate awareness, and device-specific behavior

subject not detected, hand pose missing landmarks, low confidence observations, Vision performance, coordinate conversion, VisionKit errors, observation nil, text not recognized, barcode not detected, DataScannerViewController not working, document scan issues

Use when writing, running, or debugging XCUITests. Covers element queries, waiting strategies, accessibility identifiers, test plans, and CI/CD test execution patterns.

Use when automating Instruments profiling, running headless performance analysis, or integrating profiling into CI/CD - comprehensive xctrace CLI reference with record/export patterns

Production patterns for Axum 0.8.x HTTP services with Tower middleware, type-safe routing, state management with FromRef, extractors, and error handling. Use when building REST APIs, HTTP services, web applications, or adding middleware to Axum routers.

Azure AKS Agentic CLI - AI-powered troubleshooting and insights tool for Azure Kubernetes Service. Use when diagnosing AKS cluster issues, getting cluster health insights, troubleshooting networking/storage/security problems, or analyzing cluster configuration with natural language queries.

Use az CLI for Azure cloud resource management, Azure DevOps operations, VMs, storage, networking, AKS, and Key Vault with comprehensive authentication and output control.

Managed Kubernetes with Azure Kubernetes Service. Configure node pools, networking, identity, monitoring, and scaling. Use for container orchestration, microservices deployment, and Kubernetes workloads on Azure.

Azure cloud services, resource management, and Azure CLI patterns. Use when working with Azure resources, resource groups, ARM templates, az commands (az vm, az network, az storage, az aks), Azure naming conventions, RBAC policies, networking (VNet, NSG, Application Gateway), or implementing Azure best practices for resource organization, cost management, and security.

Manage Azure Boards work items including user stories, tasks, and bugs with WIQL queries. Use when managing Azure Boards work items or creating sprint backlogs.

Guide for working with Azure DevOps REST APIs and OpenAPI specifications. Use this skill when implementing new Azure DevOps API integrations, exploring API capabilities, understanding request/response formats, or referencing the official OpenAPI specifications from the vsts-rest-api-specs repository.

Comprehensive Azure DevOps REST API skill for work items, pipelines, repos, test plans, wikis, and search operations via MCP tools and direct API calls

Create or update Azure infrastructure Bicep under infra/ for this project (Cosmos DB account/database/containers, Managed Identity, Container Apps for backend_api) using region japaneast, env dev, and Free Tier enabled. Use when asked to provision Azure infra or write Bicep templates.

Research and generate Azure deployment guide with EasyAuth (Google + Facebook) and CosmosDB. This skill searches for current documentation and screenshots to produce an up-to-date setup guide at .docs/azure-setup-guide.md.

Troubleshoot Azure using tool-first access, falling back to Azure CLI when necessary. Focus on Virtual Machines, AKS, Azure Container Registry, Storage Accounts, and Log Analytics.

Microsoft Azure architecture patterns and best practices. Use when designing, deploying, or reviewing Azure infrastructure including AKS, App Service, Functions, CosmosDB, and Entra ID.

Work with ISML templates in B2C Commerce. Use when writing storefront templates, using isprint/isset/isloop tags, understanding ISML expressions (${...}), or creating custom template modules. Covers tag syntax, expression language, and template includes.

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.

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.

Expert backend architect specializing in scalable API design,

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

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

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.

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.

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.

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.

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.