d-subrahmanyam
139 verified skills
angular-development
Expert guidance for Angular and TypeScript development focused on scalable, high-performance web applications
development
activemq
Apache ActiveMQ message broker with JMS support. Covers queues, topics, message selectors, and Spring integration. Use for enterprise Java messaging and JMS-compliant applications. USE WHEN: user mentions "activemq", "jms", "artemis", "message selectors", "virtual topics", asks about "java messaging", "jms queues", "enterprise messaging", "spring jms" DO NOT USE FOR: event streaming - use `kafka` or `pulsar`; cloud-native - use `nats`; AWS-native - use `sqs`; Azure-native - use `azure-service-bus`; non-JMS preferred - use `rabbitmq` or `kafka`
development
agent-authoring
Creates and configures Claude Code subagents (custom agents). Covers frontmatter fields, tool restrictions, model selection, hooks, memory, skills preloading, and common patterns. Follows official Anthropic best practices. USE WHEN: user mentions "create agent", "subagent", "custom agent", ".claude/agents", "agent file", "delegate task", "isolated context", "agent memory", "agent hooks" DO NOT USE FOR: creating skills - use `skill-authoring`; creating hooks standalone - use `hook-authoring`; creating MCP servers - use `mcp-authoring`
tools
angular-http
Angular HttpClient with interceptors, error handling, retry, and caching patterns. Covers functional interceptors and typed responses. USE WHEN: user mentions "HttpClient", "Angular HTTP", "interceptors", "API calls", "Angular REST", "HTTP error handling", "auth interceptor" DO NOT USE FOR: Axios - use `axios` skill, Fetch API directly, backend HTTP frameworks
tools
event-sourcing-cqrs
Event Sourcing and CQRS patterns. Event stores, projections, snapshots, command handlers, query models, and eventual consistency. Covers EventStoreDB, Axon Framework, and custom implementations. USE WHEN: user mentions "event sourcing", "CQRS", "event store", "projection", "command handler", "read model", "write model", "EventStoreDB", "Axon" DO NOT USE FOR: simple event-driven architecture - use `event-driven`; message brokers - use messaging skills; DDD basics - use `ddd`
development
anthropic-claude-development
Expert guidance for Anthropic Claude API development including Messages API, tool use, prompt engineering, and building production applications with Claude models.
tools
accessibility-a11y
Implement web accessibility (a11y) best practices following WCAG guidelines to create inclusive, accessible user interfaces.
development
actix-web
Actix-web Rust web framework. Covers routing, extractors, middleware, state management, and WebSocket. Use for high-performance Rust APIs. USE WHEN: user mentions "actix-web", "actix", "rust web framework", "rust api", asks about "rust async web", "actix middleware", "actix extractors", "rust websocket", "high performance rust api" DO NOT USE FOR: Axum projects - use `axum` instead, Rocket projects - use `rocket` instead, Warp projects - use `warp` instead, non-Rust backends
development
alpine-js
Alpine.js development guidelines for lightweight reactive interactions with Tailwind CSS and various backend frameworks.
development
analytics-data-analysis
Implement analytics, data analysis, and visualization best practices using Python, Jupyter, and modern data tools.
tools
angular
Angular 17+ with standalone components and signals. Covers components, services, dependency injection, and reactive patterns. USE WHEN: user mentions "Angular", "standalone components", "signals", "dependency injection", "RxJS", "NgModules", asks about "Angular 17 patterns", "Angular signals" DO NOT USE FOR: AngularJS (v1.x) - legacy framework, React - use `frontend-react`, Vue - use `vue-composition`, Svelte - use `svelte`
development
angular-forms
Angular Reactive Forms with validators, FormArray, and dynamic forms. Covers typed forms, custom validators, and form patterns. USE WHEN: user mentions "Angular forms", "reactive forms", "FormGroup", "FormArray", "validators", "form validation", "Angular form patterns" DO NOT USE FOR: React forms - use `react-hook-form` or `react-forms`, template-driven forms for simple cases
development
angular-ssr
Angular SSR with @angular/ssr, hydration, and prerendering. Covers server-side rendering setup, transfer state, and deployment. USE WHEN: user mentions "Angular SSR", "server-side rendering", "Angular Universal", "@angular/ssr", "hydration", "prerendering", "Angular SEO" DO NOT USE FOR: Next.js SSR - use `nextjs`, Nuxt SSR - use `vue-composition`, SvelteKit SSR - use `svelte`
devops
angular-testing
Angular testing with TestBed, ComponentFixture, service testing, and HttpTestingController. Covers standalone component testing and signal testing. USE WHEN: user mentions "Angular testing", "TestBed", "ComponentFixture", "Angular unit test", "HttpTestingController", "testing Angular components", "Angular service test" DO NOT USE FOR: Playwright E2E tests - use `playwright`, React testing - use `react-testing` or `testing-library`
development
autogen-development
Expert guidance for Microsoft AutoGen multi-agent framework development including agent creation, conversations, tool integration, and orchestration patterns.
tools
api-gateway
API gateway patterns and implementations. Kong, AWS API Gateway, NGINX as gateway, rate limiting, request routing, authentication offloading, and request/response transformation. USE WHEN: user mentions "API gateway", "Kong", "AWS API Gateway", "NGINX gateway", "gateway pattern", "request routing", "BFF" DO NOT USE FOR: reverse proxy basics - use infrastructure skills; service mesh - use `service-mesh`; rate limiting in app - use `rate-limiting`
development
api-versioning
API versioning strategies for frontend-backend compatibility. Covers URL versioning, header versioning, and migration patterns. USE WHEN: user asks about "API versioning", "v1 v2 API", "API migration", "breaking changes", "backward compatibility" DO NOT USE FOR: schema versioning - use database skills, feature flags - use deployment skills
development
apollo-graphql
Guidelines for developing GraphQL APIs and React applications using Apollo Client for state management, data fetching, and caching
tools
aspnet-blazor
Blazor Server, WebAssembly, and United (Auto) with components, interop, and render modes. Covers .NET 8+ Blazor patterns. USE WHEN: user mentions "Blazor", "Blazor Server", "Blazor WASM", "Blazor WebAssembly", "Blazor components", "render modes", "Blazor interop" DO NOT USE FOR: Angular components - use `angular`, React components - use `react`, Svelte - use `svelte`
development
aspnet-core
ASP.NET Core 8+ with controllers, services, DI, configuration, and middleware pipeline. Covers Program.cs setup and enterprise patterns. USE WHEN: user mentions "ASP.NET Core", "Web API", ".NET controllers", "Program.cs", "dependency injection", ".NET DI", ".NET configuration", "appsettings" DO NOT USE FOR: Minimal APIs (use `aspnet-minimal-api`), Spring Boot (use `spring-boot`), NestJS (use `nestjs`), Express (use `express`)
development
aspnet-identity
ASP.NET Core Identity for authentication, roles, claims, and external providers. Covers Identity setup, customization, and token-based auth. USE WHEN: user mentions "ASP.NET Identity", "user authentication", ".NET auth", "roles and claims", "Identity scaffolding", "external login providers" DO NOT USE FOR: JWT-only auth without Identity, Spring Security - use `spring-security`
testing
aspnet-middleware
ASP.NET Core custom middleware, pipeline order, exception handling middleware, and request/response manipulation. USE WHEN: user mentions "middleware", "request pipeline", "exception middleware", "ASP.NET middleware", "UseMiddleware", "pipeline order" DO NOT USE FOR: Express middleware - use `express`, NestJS middleware - use `nestjs`
devops
aspnet-minimal-api
ASP.NET Core Minimal API endpoints, route groups, filters, and typed results. Covers modern .NET 8+ endpoint patterns. USE WHEN: user mentions "Minimal API", "MapGet", "MapPost", "route groups", "endpoint filters", ".NET minimal", "lambda endpoints" DO NOT USE FOR: Controller-based APIs (use `aspnet-core`), Express.js (use `express`), FastAPI (use `fastapi`)
development
aspnet-validation
ASP.NET Core validation with FluentValidation, Data Annotations, and model validation. Covers custom validators and validation pipeline. USE WHEN: user mentions "FluentValidation", "Data Annotations", "model validation", ".NET validation", "input validation", "validator", "validation pipeline" DO NOT USE FOR: Spring Validation - use `spring-validation`, Zod/Yup - use frontend validation skills
development
audit-logging
Audit logging for compliance and security. Structured audit events, immutable logs, user action tracking, database change tracking, and regulatory compliance (SOC2, HIPAA, GDPR). USE WHEN: user mentions "audit log", "audit trail", "activity log", "change tracking", "compliance logging", "who changed what", "SOC2 logging" DO NOT USE FOR: application logging - use logging skills; error tracking - use observability skills
testing
aws-development
AWS development best practices for Lambda, SAM, CDK, DynamoDB, IAM, and serverless architecture using Infrastructure as Code.
development
axum
Axum Rust web framework by Tokio. Covers routing, handlers, extractors, middleware, and state. Use for ergonomic async Rust APIs. USE WHEN: user mentions "axum", "tokio web", "rust async api", "tower middleware", asks about "axum extractors", "axum state", "axum router", "rust websocket axum", "hyper server", "ergonomic rust api" DO NOT USE FOR: Actix-web projects - use `actix-web` instead, Rocket projects - use `rocket` instead, Warp projects - use `warp` instead, non-Rust backends
development
azure
Azure cloud services SDK integration. Azure Functions, Cosmos DB, Blob Storage, Service Bus, Azure AD (Entra ID), and Key Vault. Node.js and .NET SDKs. USE WHEN: user mentions "Azure", "Azure Functions", "Cosmos DB", "Blob Storage", "Service Bus", "Azure AD", "Entra ID", "Key Vault", "Azure SDK" DO NOT USE FOR: AWS services - use `aws`; GCP services - use `gcp`; Terraform for Azure - use `terraform`
development
bash-scripting
Bash scripting guidelines covering security, portability, error handling, and automation best practices for DevOps.
tools
beautifulsoup-parsing
Expert guidance for HTML/XML parsing using BeautifulSoup in Python with best practices for DOM navigation, data extraction, and efficient scraping workflows.
development
biome
Biome linter and formatter for JavaScript/TypeScript. Covers configuration, rules, and integration patterns. Replaces ESLint + Prettier for faster development experience. USE WHEN: user mentions "biome", "linting", "formatting", "code style", "biome.json", asks about "setup linter", "format code", "migrate from ESLint", "migrate from Prettier", "biome rules", "biome configuration" DO NOT USE FOR: ESLint configuration - Biome is an ESLint replacement, Prettier configuration - Biome is a Prettier replacement, TypeScript compilation - use TypeScript compiler, Code quality principles - use `clean-code` skill
development
bitbucket-workflow
Bitbucket best practices for pull requests, Pipelines CI/CD, Jira integration, and Atlassian ecosystem workflows
testing
bootstrap
Bootstrap development guidelines for responsive layouts, components, and utility-first styling.
tools
bulk-engineering
Bulk engineering approaches, tools, and implementation strategies for mass-generating PLC/DCS control logic, HMI displays, and I/O configurations from engineering databases. Use when planning or implementing automation of DCS engineering workflows.
tools
bun
Bun JavaScript runtime. Fast all-in-one toolkit with bundler, test runner, package manager. Use when working with Bun projects or considering Node.js alternatives. USE WHEN: user mentions "bun", "bun test", "bun build", asks about "Bun.serve", "bun install", "SQLite in Bun", "bunx", "performance comparison" DO NOT USE FOR: Node.js runtime - use `nodejs` skill instead DO NOT USE FOR: Hono/Elysia frameworks - use framework-specific skills DO NOT USE FOR: Language syntax - use `typescript` or `javascript` skills
tools
business-central-development
Expert guidance for Microsoft Dynamics 365 Business Central development using AL language and extensions
tools
caching-strategies
Application caching patterns. Redis caching, in-memory caches, HTTP caching, cache invalidation strategies, cache-aside, write-through, and CDN caching. USE WHEN: user mentions "caching", "cache invalidation", "Redis cache", "HTTP cache", "CDN caching", "cache-aside", "write-through", "TTL", "stale-while-revalidate" DO NOT USE FOR: Redis as database/queue - use `redis` or `job-queues`; browser storage - use frontend skills
development
charting
Chart and data visualization libraries. Recharts, Chart.js, D3.js, Victory, Nivo, ECharts. Common chart types, responsive design, and real-time updates. USE WHEN: user mentions "chart", "graph", "data visualization", "Recharts", "Chart.js", "D3", "ECharts", "Victory", "bar chart", "line chart", "dashboard" DO NOT USE FOR: PDF report generation - use `pdf-generation`; data export - use `data-export`
data-ai
chi
Chi lightweight Go HTTP router. Covers routing, middleware, context, and patterns. Use for idiomatic, stdlib-compatible Go APIs. USE WHEN: user mentions "chi", "go-chi", "lightweight go router", "stdlib go router", asks about "chi middleware", "chi router", "chi context", "idiomatic go api", "net/http compatible router", "chi patterns" DO NOT USE FOR: Gin projects - use `gin` instead, Echo projects - use `echo` instead, Fiber projects - use `fiber` instead, non-Go backends
development
chrome-extension-development
Expert guidelines for Chrome extension development with Manifest V3, covering security, performance, and best practices
tools
class-validator
Class-validator decorator-based validation for TypeScript. Standard in NestJS. Use when building APIs with NestJS or needing class-based validation. USE WHEN: user mentions "class-validator", "NestJS validation", "DTO validation", "decorator validation", asks about "NestJS DTOs", "ValidationPipe" DO NOT USE FOR: Zod/Yup projects (use zod/yup skills), non-decorator patterns, client-side forms (prefer Zod), non-NestJS backends
tools
clean-architecture
Guidelines for implementing Clean Architecture patterns in Flutter and Go applications, with emphasis on separation of concerns, dependency rules, and testability.
development
clean-code
Clean code principles. Covers naming, functions, and readability. Use when writing or reviewing code for quality. USE WHEN: user mentions "code quality", "readability", "refactor", "clean up code", "naming", "magic numbers", asks about "how to write better code", "code smells", "DRY", "KISS", "YAGNI", "single responsibility" DO NOT USE FOR: SOLID principles - use `solid-principles` instead, Git workflow - use `git-workflow` instead, Performance optimization - use `performance` instead
development
clerk-authentication
Guidelines for implementing Clerk authentication in Next.js applications with middleware, hooks, and security best practices
testing
cloudflare-development
Cloudflare Workers, Pages, KV, D1, R2, and Durable Objects development best practices for edge computing applications.
development
cloud-storage
Cloud object storage integration with AWS S3, Azure Blob Storage, and Google Cloud Storage. Covers presigned URLs, multipart uploads, bucket policies, lifecycle rules, and CDN integration. USE WHEN: user mentions "S3", "blob storage", "cloud storage", "object storage", "presigned URL", "file upload to cloud", "GCS", "Azure Blob", "bucket" DO NOT USE FOR: local file uploads - use `file-upload`; database BLOB columns; local filesystem operations
development
convex
Guidelines for developing with Convex backend-as-a-service platform, covering queries, mutations, actions, and real-time data patterns
development
cors-security-headers
CORS configuration and HTTP security headers. CORS middleware, preflight requests, Content-Security-Policy, CSRF protection, Helmet.js, and secure cookie configuration. USE WHEN: user mentions "CORS", "cross-origin", "CSP", "Content-Security-Policy", "CSRF", "security headers", "Helmet", "preflight", "Access-Control" DO NOT USE FOR: authentication tokens - use `jwt` or `oauth2`; encryption - use `cryptography`
testing
cpp
Guidelines for modern C++ development with C++17/20 standards, memory safety, and performance optimization
development
cryptography
Application-level cryptography. Password hashing (bcrypt, argon2), encryption (AES-GCM), digital signatures, key management, and secure random generation. USE WHEN: user mentions "encryption", "hashing", "bcrypt", "argon2", "AES", "cryptography", "digital signature", "key management", "HMAC" DO NOT USE FOR: TLS/HTTPS configuration - use infrastructure skills; JWT tokens - use `jwt`; OAuth flows - use `oauth2`
development
css
Best practices for CSS development including modern layout techniques, naming conventions, theming, and maintainable stylesheet architecture
development
cypress
Cypress E2E testing framework. Covers commands, assertions, and component testing. Use for end-to-end testing. USE WHEN: user mentions "cypress", "e2e test", "cy.get", "cy.visit", asks about "cypress intercept", "component testing", "cypress commands" DO NOT USE FOR: Unit tests - use `vitest` or `jest`; Multi-tab scenarios - Cypress doesn't support; Native mobile apps - use Appium; Performance testing - use dedicated tools
tools
data-analysis-jupyter
Expert guidance for data analysis, visualization, and Jupyter Notebook development with pandas, matplotlib, seaborn, and numpy.
development
data-analyst
Data analysis best practices with pandas, numpy, matplotlib, seaborn, and Jupyter notebooks.
data-ai
data-export
Data export to CSV, Excel (XLSX), and JSON. ExcelJS, SheetJS (xlsx), Papa Parse, Apache POI (Java), openpyxl (Python). Streaming exports for large datasets. USE WHEN: user mentions "export CSV", "export Excel", "XLSX generation", "download spreadsheet", "ExcelJS", "SheetJS", "Papa Parse", "data export" DO NOT USE FOR: PDF generation - use `pdf-generation`; file upload/download - use `file-upload`/`cloud-storage`
development
dcs-platforms
Reference for major DCS/PLC platforms - ABB Freelance, Siemens PCS7/TIA Portal, Emerson DeltaV, Honeywell Experion. Use when comparing platforms, mapping function blocks across vendors, or designing cross-platform solutions.
content-media
ddd
Domain-Driven Design patterns. Bounded contexts, aggregates, entities, value objects, domain events, repositories, and application services. Strategic and tactical DDD for complex business domains. USE WHEN: user mentions "DDD", "Domain-Driven Design", "bounded context", "aggregate", "value object", "domain event", "ubiquitous language", "aggregate root", "domain service" DO NOT USE FOR: database schema design - use database skills; CQRS/Event Sourcing specifics - use `event-sourcing-cqrs`
testing
deep-learning-python
Guidelines for deep learning development with PyTorch, Transformers, Diffusers, and Gradio for LLM and diffusion model work.
development
deno
Deno runtime for TypeScript/JavaScript. Covers permissions, standard library, testing, and Deploy. Use for secure, TypeScript-native backend development. USE WHEN: user mentions "deno", "permissions", "Deno.serve", asks about "deno test", "deno deploy", "standard library", "top-level await", "npm compatibility" DO NOT USE FOR: Node.js runtime - use `nodejs` skill instead DO NOT USE FOR: Fresh/Oak frameworks - use framework-specific skills DO NOT USE FOR: Language syntax - use `typescript` skill
development
deno-deploy
Use when deploying Deno apps to production, asking about Deno Deploy, or working with `deno deploy` CLI commands. Covers deployment workflows, environment variables, KV database access, custom domains, the --tunnel flag for local development, and the `deno deploy` command reference.
tools
deno-expert
Expert-level Deno knowledge for code review, debugging, and best practice enforcement. Use when reviewing Deno code or answering advanced Deno questions.
development
deno-frontend
Use when working with Fresh framework, creating routes or handlers in Fresh, building web UIs with Preact, or adding Tailwind CSS in Deno. Covers Fresh 2.x project structure, route handlers, islands, createDefine, PageProps, context patterns, and Fresh 1.x to 2.x migration. Essential for any Fresh-related question.
development
deno-guidance
Use when starting any Deno project, choosing packages, configuring deno.json, or running CLI commands. Provides foundational knowledge for building modern Deno applications.
tools
deno-sandbox
Use when building features that execute untrusted user code, AI-generated code, or need isolated code execution environments. Covers the @deno/sandbox SDK.
development
deno-testing
Deno testing with Deno.test and std/testing. Covers unit tests, async tests, mocking, snapshots, and BDD-style testing. USE WHEN: user mentions "deno test", "deno testing", asks about "Deno.test", "assertSnapshot", "FakeTime", "spy", "stub", "BDD deno" DO NOT USE FOR: Node.js projects - use `vitest` or `jest`; Browser-only code - use Playwright; Python - use `pytest`; Java - use `junit`; Non-Deno TypeScript - use `vitest`
development
deno-typescript
Guidelines for developing with Deno and TypeScript using modern runtime features, security model, and native tooling
tools
deployment-strategies
Production deployment strategies. Blue-green, canary, rolling update, recreate. Zero-downtime deployments, rollback procedures, database migration coordination, and deployment automation. USE WHEN: user mentions "blue-green", "canary deployment", "rolling update", "zero-downtime", "deployment strategy", "rollback", "deploy pipeline" DO NOT USE FOR: CI/CD pipeline syntax - use `github-actions`; container orchestration - use `kubernetes`; IaC - use `terraform`
tools
django
Django batteries-included Python framework. Covers models, views, templates, ORM, and admin. Use when building full-featured Python web applications. USE WHEN: user mentions "django", "django orm", "django admin", "django templates", asks about "python cms", "django rest framework", "drf", "django models", "django migrations", "django channels", "django forms" DO NOT USE FOR: FastAPI projects - use `fastapi` instead, Flask projects - use `flask` instead, async-first Python APIs, microservices without admin panel
development
django-rest-api-development
Comprehensive guidelines for building scalable Django REST APIs with proper architecture, authentication, and performance optimization.
development
docker
Docker containerization. Covers Dockerfile, images, and best practices. Use for containerizing applications. USE WHEN: user mentions "dockerfile", "docker build", "docker run", "containerize", "docker image", "multi-stage build", asks about "how to dockerize", "container security", "docker optimization", "image size", "docker layers" DO NOT USE FOR: docker-compose multi-service setups - use `docker-compose` skill instead, Kubernetes orchestration - use `kubernetes` skill instead
development
docker-compose
Docker Compose for multi-container apps. Covers services, networks, and volumes. Use for local development environments. USE WHEN: user mentions "docker-compose", "docker-compose.yml", "multi-container", "service dependencies", "docker compose up", asks about "local dev environment", "microservices setup", "database + app setup", "docker networks", "docker volumes" DO NOT USE FOR: single container Dockerfiles - use `docker` skill instead, production orchestration - use `kubernetes` skill instead, CI/CD pipelines - use `github-actions` skill instead
development
dotnet
Guidelines for .NET backend development with C#, ASP.NET Core, and Entity Framework Core
development
dotnet-quality
.NET code quality with Roslyn analyzers, StyleCop, and dotnet format. Covers linting, formatting, and best practices for C#/.NET. USE WHEN: user works with "C#", ".NET", "ASP.NET Core", asks about "Roslyn analyzers", "StyleCop", "dotnet format", ".NET linting", "C# best practices" DO NOT USE FOR: SonarQube - use `sonarqube` skill, testing - use .NET test skills, security - use `dotnet-security` skill
development
dotnet-security
.NET and ASP.NET Core security patterns. Covers Identity, authentication, dependency auditing, secure coding practices, and OWASP for .NET ecosystem. USE WHEN: user works with "C#", ".NET", "ASP.NET Core", "Entity Framework", asks about ".NET vulnerabilities", "NuGet security", ".NET authentication", "Blazor security" DO NOT USE FOR: general OWASP concepts - use `owasp` or `owasp-top-10` instead, Java/Python security - use language-specific skills
development
drizzle
Drizzle ORM for TypeScript. Covers schema definition, queries, and migrations. Use for type-safe SQL with minimal overhead. USE WHEN: user mentions "drizzle", "drizzle-orm", "drizzle-kit", "pgTable", "mysqlTable", asks about "lightweight orm", "sql-like orm", "drizzle schema", "drizzle migrations", "drizzle studio", "type-safe sql builder" DO NOT USE FOR: Prisma projects - use `prisma` skill; TypeORM - use `typeorm` skill; raw SQL - use `database-query` MCP; SQLAlchemy - use `sqlalchemy` skill; NoSQL databases - use `mongodb` skill
tools
drupal-development
Expert guidance for Drupal 10 module development with PHP 8+, SOLID principles, and Drupal coding standards
development
elasticsearch-best-practices
Elasticsearch development best practices for indexing, querying, and search optimization
development
electron
Electron framework for building cross-platform desktop applications with JavaScript, HTML, and CSS. Covers architecture, IPC, security, packaging, auto-updates, and backend integration patterns. USE WHEN: user mentions "Electron", "desktop app", "cross-platform application", asks about "IPC", "main process", "renderer process", "Electron packaging", "auto-updates", "code signing", "Electron security" DO NOT USE FOR: Tauri applications - use `tauri` skill instead
development
electron-development
Electron development guidelines for building cross-platform desktop applications with JavaScript/TypeScript
development
elixir
Expert in Elixir and Phoenix development with functional programming patterns
development
email-sending
Email sending integration. Covers Nodemailer (Node.js), Spring Mail (Java), smtplib (Python). Transactional email services: SendGrid, Amazon SES, Resend. Template engines: MJML, React Email. USE WHEN: user mentions "send email", "nodemailer", "SMTP", "SendGrid", "SES", "Resend", "transactional email", "email template", "MJML", "React Email", "spring mail" DO NOT USE FOR: push notifications - use `push-notifications`; SMS - different channel; email parsing/reading
development
entity-framework-core
Entity Framework Core with DbContext, migrations, LINQ queries, relationships, and performance optimization. Covers EF Core 8+ patterns. USE WHEN: user mentions "Entity Framework", "EF Core", "DbContext", "migrations", "LINQ", "EF relationships", "database first", "code first" DO NOT USE FOR: Prisma - use `prisma`, Drizzle - use `drizzle`, Spring Data JPA - use `spring-data-jpa`, Dapper (raw SQL)
development
error-contract
Standardized error response handling between frontend and backend. Covers error structure, status codes, and consistent error handling. USE WHEN: user asks about "error handling", "API errors", "error response format", "status codes", "error messages", "validation errors" DO NOT USE FOR: logging - use logging skills, exception handling - use language-specific skills
development
error-handling
Error handling patterns across languages and frameworks. Custom error classes, global exception handlers, Problem Details (RFC 9457), error boundaries (React), Result types, and structured error responses. USE WHEN: user mentions "error handling", "exception handler", "error boundary", "custom error", "Problem Details", "error response", "global error handler" DO NOT USE FOR: logging errors - use logging skills; error tracking services - use `error-tracking`
development
error-tracking
Error tracking and monitoring integration. Sentry, Datadog RUM, Bugsnag. Source maps, breadcrumbs, release tracking, performance monitoring, and alerting configuration. USE WHEN: user mentions "Sentry", "error tracking", "Bugsnag", "Datadog RUM", "crash reporting", "source maps", "release tracking", "error monitoring" DO NOT USE FOR: application logging - use logging skills; APM/tracing - use `opentelemetry`; structured error responses - use `error-handling`
testing
esbuild-bundler
Best practices and guidelines for esbuild, the ultra-fast JavaScript and TypeScript bundler and minifier
development
eslint
ESLint - pluggable JavaScript/TypeScript linter USE WHEN: user mentions "ESLint", "JavaScript linting", ".eslintrc", asks about "eslint config", "linting rules", "eslint plugins", "flat config" DO NOT USE FOR: Biome - use `eslint-biome` skill, TypeScript-specific - use `typescript-eslint` skill, code quality principles - use `quality-common`
tools
eslint-biome
ESLint 9 flat config and Biome linter configuration. Covers typescript-eslint, rule categories, migration from legacy config, and performance optimization. USE WHEN: user mentions "ESLint 9", "Biome", "flat config", "eslint.config.mjs", asks about "typescript-eslint", "migration to ESLint 9", "linter performance", "Biome vs ESLint" DO NOT USE FOR: legacy ESLint - use `eslint` skill, Java/Spring - use SonarQube, basic linting concepts - use `quality-common`
development
etl-pipelines
ETL/ELT data pipeline patterns. Extract from APIs/databases, transform with streaming or batch, load to data warehouses. Node.js streams, Python pandas/Polars, Apache Airflow DAGs, and database-native ELT. USE WHEN: user mentions "ETL", "ELT", "data pipeline", "data ingestion", "Airflow", "data warehouse", "batch processing", "data migration" DO NOT USE FOR: real-time event streaming - use messaging skills; data export to CSV/Excel - use `data-export`
development
event-driven
Event-driven architecture patterns and best practices. Covers Saga, Outbox, CQRS, Event Sourcing, and messaging patterns for distributed systems. USE WHEN: user mentions "event-driven", "Saga", "Outbox pattern", "CQRS", "Event Sourcing", "distributed transactions", "eventual consistency", "message broker", "event bus", asks about "microservices communication", "async patterns", "compensating transactions" DO NOT USE FOR: Simple pub/sub - use messaging framework skills (Kafka, RabbitMQ), REST APIs - use API design skills, Real-time updates - use WebSocket skills, Basic async/await - use language-specific skills
development
expo
Expo framework for React Native. Managed and bare workflows, Expo Router, EAS Build/Submit/Update, config plugins, and Expo SDK modules. USE WHEN: user mentions "Expo", "expo-router", "EAS Build", "expo-cli", "app.json", "expo-config-plugin", "Expo Go" DO NOT USE FOR: bare React Native without Expo - use `react-native`; Flutter - use `flutter`
tools
expo-react-native-javascript-best-practices
Expo React Native JavaScript best practices for clean code, functional components, performance optimization, and Expo Router navigation.
development
express
Express.js minimal Node.js web framework. Covers routing, middleware, error handling, and API design. Use when building Express APIs. USE WHEN: user mentions "Express", "express.js", "app.use", "middleware", "express Router", asks about "minimalist Node.js framework", "simple REST API", "lightweight web server", "Node.js middleware pattern" DO NOT USE FOR: Enterprise applications with DI - use `nestjs` instead, High-performance APIs - use `fastify` instead, Edge runtimes - use `hono` instead, Deno - use `oak` or `fresh` instead
development
express-typescript
Guidelines for building robust APIs with Express.js and TypeScript, covering middleware patterns, routing, and security best practices
development
factory-boy
factory_boy test data generation specialist. Covers Factory, DjangoModelFactory, SQLAlchemyModelFactory, all field declarations (Faker, LazyAttribute, Sequence, SubFactory, RelatedFactory, post_generation, Trait, Maybe, Dict, List), batch creation, pytest integration, and Celery task testing patterns. USE WHEN: user mentions "factory_boy", "test factory", "DjangoModelFactory", "SQLAlchemyModelFactory", asks about "test data generation", "factory traits", "SubFactory", "factory fixtures". DO NOT USE FOR: pytest internals - use `pytest`; Django setup - use `pytest-django`; Hypothesis property testing - use `pytest` with Hypothesis
development
fastapi-microservices-serverless
Expert in FastAPI microservices for serverless and cloud-native environments
development
fastapi-python
Expert in FastAPI Python development with best practices for APIs and async operations
development
fastapi-testing
FastAPI integration testing specialist. Covers synchronous TestClient, async httpx AsyncClient, dependency injection overrides, auth testing (JWT, OAuth2, API keys), WebSocket testing, file uploads, background tasks, middleware testing, and HTTP mocking with respx, responses, and pytest-httpserver. USE WHEN: user mentions "FastAPI test", "TestClient", "httpx async test", "dependency override test", "respx mock", asks about testing FastAPI endpoints, authentication in tests, or HTTP client mocking. DO NOT USE FOR: Django - use `pytest-django`; pytest internals - use `pytest`; Container infrastructure - use `testcontainers-python`
tools
api-development
Guidelines for building clean, scalable APIs with Go standard library and NestJS TypeScript, covering security, validation, and modular architecture.
development
devops
Comprehensive DevOps engineering practices for Kubernetes, CI/CD, Bash scripting, Ansible, and cloud infrastructure.
development
blockchain
Expert guidelines for blockchain development including CosmWasm, Cosmos, and cross-chain patterns
development
angular-routing
Angular Router with lazy loading, guards, resolvers, and route params. Covers standalone route configuration and functional guards. USE WHEN: user mentions "Angular routing", "lazy loading", "route guards", "resolvers", "navigation", "Angular routes", "canActivate", "loadChildren" DO NOT USE FOR: React Router - use `react-router`, Vue Router - use `vue-composition`, Next.js routing - use `nextjs`
development
anthropic-python
Anthropic Python SDK for Claude API integration. Covers messages API, streaming, tool use, vision, error handling, and best practices. Use when building Python applications that call the Claude API. USE WHEN: user mentions "anthropic", "claude api", "anthropic sdk", "anthropic.Anthropic()", "client.messages.create", "claude-opus", "claude-sonnet", "tool_use", "streaming claude", "claude python" DO NOT USE FOR: OpenAI API, other LLM providers, JavaScript/TypeScript Anthropic SDK
tools
auth0-authentication
Guidelines for implementing Auth0 authentication with best practices for security, rules, actions, and SDK integration
development
axe-core
axe-core - accessibility testing engine for automated WCAG compliance checks. USE WHEN: user mentions "axe", "automated accessibility testing", "a11y tests", asks about "integrating accessibility checks", "CI/CD accessibility", "Playwright accessibility", "Jest accessibility", "Vitest axe" DO NOT USE FOR: manual accessibility audits - use `wcag` skill instead
testing
azure-service-bus
Azure Service Bus enterprise messaging service. Covers queues, topics, sessions, and transactions. Use for Azure-native enterprise messaging and hybrid cloud scenarios. USE WHEN: user mentions "azure service bus", "service bus queues", "service bus topics", "sessions", "azure messaging", asks about "azure queue", "managed identity", "subscription filters" DO NOT USE FOR: AWS-native - use `sqs`; GCP-native - use `google-pubsub`; event streaming - use Event Hubs or `kafka`; on-premise - use `rabbitmq` or `activemq`; lightweight - use `nats`
development
c-sharp
Guidelines for C# development including Blazor, Unity game development, and .NET backend best practices
development
computer-vision-opencv
Expert guidance for computer vision development using OpenCV, PyTorch, and modern deep learning techniques for image and video processing.
development
contract-testing
Contract testing for API consumers and providers. Pact framework, Spring Cloud Contract, consumer-driven contracts, provider verification, and contract broker setup. USE WHEN: user mentions "contract testing", "Pact", "consumer-driven contract", "Spring Cloud Contract", "API contract", "provider verification" DO NOT USE FOR: OpenAPI validation - use `openapi-contract`; integration testing - use integration test skills
development
cron-scheduling
Cron and scheduled task management. node-cron, cron expressions, Spring @Scheduled, APScheduler (Python), and distributed scheduling patterns. USE WHEN: user mentions "cron", "scheduled task", "cron job", "node-cron", "@Scheduled", "APScheduler", "periodic task", "crontab" DO NOT USE FOR: job queues with workers - use `job-queues`; one-off delayed tasks - use `job-queues`
development
csharp
C# 12 language features including records, pattern matching, nullable reference types, LINQ, async/await, and modern language patterns. USE WHEN: user mentions "C#", "C# records", "pattern matching", "LINQ", "async/await", "nullable reference types", "C# generics", "C# language features" DO NOT USE FOR: TypeScript - use `typescript`, Java - use Java skills, F# or VB.NET specific features
development
deno-project-templates
Use when scaffolding new Deno projects. Provides templates for Fresh web apps, CLI tools, libraries, and API servers with modern best practices.
tools
deep-learning
Comprehensive deep learning guidelines for neural network development, training, and optimization.
development
dto-sync-patterns
Patterns for synchronizing DTOs between frontend and backend. Covers shared types, code generation, and validation sync. USE WHEN: user asks about "DTO sync", "shared types", "frontend backend types", "type consistency", "API models" DO NOT USE FOR: type generation tools - use `type-generation` skill, validation rules - use validation skills
tools
echo
Echo Go web framework. Covers routing, middleware, binding, context, and WebSocket. Use for high-performance, minimalist Go APIs. USE WHEN: user mentions "echo", "labstack echo", "go echo framework", asks about "echo middleware", "echo context", "echo binding", "echo websocket", "high performance go api", "echo router" DO NOT USE FOR: Gin projects - use `gin` instead, Fiber projects - use `fiber` instead, Chi projects - use `chi` instead, non-Go backends
development
elasticsearch
Elasticsearch search and analytics engine. Full-text search, aggregations, document store. Use when implementing search functionality or log analytics. USE WHEN: user mentions "elasticsearch", "full-text search", "search indexing", "log analytics", "ELK stack", "aggregations", "faceted search", "autocomplete", "suggestions" DO NOT USE FOR: primary database - use `postgresql` or `mongodb` instead, caching - use `redis` instead, ACID transactions - use SQL databases instead
development
esbuild
esbuild extremely fast JavaScript bundler. Used internally by Vite. Use for simple bundling, library builds, or understanding Vite internals. USE WHEN: user mentions "esbuild", "fast bundler", asks about "esbuild config", "library bundling", "esbuild API" DO NOT USE FOR: Complex apps (use Vite), Webpack projects (use webpack skill), need extensive plugins (use Rollup/Webpack)
tools
expo-react-native-typescript
Expert in Expo React Native TypeScript mobile development with best practices
development
fastapi
FastAPI modern Python web framework. Covers routing, Pydantic models, dependency injection, and async support. Use when building Python APIs. USE WHEN: user mentions "fastapi", "pydantic", "async python api", "python rest api", asks about "dependency injection python", "python openapi", "python swagger", "async endpoints", "python api validation", "fastapi middleware" DO NOT USE FOR: Django apps - use `django` instead, Flask apps - use `flask` instead, synchronous Python APIs without type hints, GraphQL-only APIs
development
auth-flow-validation
Authentication flow validation between frontend and backend. Covers JWT, OAuth2, token refresh, and session management sync. USE WHEN: user asks about "auth integration", "JWT validation", "token refresh", "401 handling", "authentication flow", "login integration" DO NOT USE FOR: security auditing - use security skills, OAuth provider setup - use authentication skills
development
astro
Astro content-focused web framework. Covers islands architecture, content collections, and multi-framework support. Use when building content-heavy or static websites. USE WHEN: user mentions "Astro", asks about "islands architecture", "content collections", "Astro components", "client directives", "Astro.glob", "static site generation with Astro", "multi-framework in Astro" DO NOT USE FOR: Next.js - use `nextjs-app-router` instead; Nuxt - use `nuxt3` instead; SvelteKit - use `sveltekit` instead; Gatsby - use Astro as modern alternative; pure React/Vue/Svelte - use respective framework skills
tools
backend-development
Guidelines for backend development in C++ and Elixir/Phoenix, covering modern language features, best practices, and production-ready patterns.
development
cheerio-parsing
Expert guidance for HTML/XML parsing using Cheerio in Node.js with best practices for DOM traversal, data extraction, and efficient scraping pipelines.
development
ci-cd-best-practices
CI/CD best practices for building automated pipelines, deployment strategies, testing, and DevOps workflows across platforms
development
design-systems
Comprehensive design system guidelines for building consistent, accessible, and scalable digital products
development
ethereum
Expert guidelines for Ethereum smart contract development with Solidity, OpenZeppelin, and Hardhat
development
fastify-typescript
Guidelines for building high-performance APIs with Fastify and TypeScript, covering validation, Prisma integration, and testing best practices
development
aspnet-signalr
ASP.NET Core SignalR for real-time hubs, clients, groups, and streaming. Covers strongly-typed hubs and hub filters. USE WHEN: user mentions "SignalR", "real-time", "WebSocket", "hubs", "real-time notifications", ".NET WebSocket", "push notifications" DO NOT USE FOR: Spring WebSocket - use `spring-websocket`, Socket.IO - use Angular/React WebSocket patterns
tools
android-development
Android development guidelines for Kotlin with clean architecture, MVI pattern, Material Design, and best practices for building robust mobile applications
development
anime-js
Expert guidelines for building performant animations with Anime.js animation library
development
angular-material
Angular Material and CDK for UI components, theming, and custom components. Covers standalone Material components and custom themes. USE WHEN: user mentions "Angular Material", "Material CDK", "mat-table", "mat-dialog", "Angular UI components", "Material theming", "Angular CDK" DO NOT USE FOR: Bootstrap - use CSS framework skills, PrimeNG or other Angular UI libs
development
apache-poi
Apache POI for Excel file manipulation in Java applications. USE WHEN: user mentions "Apache POI", "Excel generation", asks about "Java Excel", "XLSX export", "Excel import", "POI workbook", "spreadsheet generation" DO NOT USE FOR: CSV files - use OpenCSV or standard Java CSV libraries
development
axios
Axios - promise-based HTTP client for browser and Node.js USE WHEN: user mentions "Axios", "HTTP requests", "API calls", "interceptors", "Axios instance", asks about "how to make HTTP calls", "configure Axios", "add auth header", "handle HTTP errors" DO NOT USE FOR: Fetch API - use `http-clients` instead; ky/ofetch - use `http-clients` instead; GraphQL clients - use `graphql-codegen` instead; tRPC - use `trpc` instead
tools
aws
AWS SDK integration for Node.js (v3) and Python (boto3). Core services: S3, Lambda, DynamoDB, SQS, SNS, CloudWatch, IAM. Configuration, credentials, and production patterns. USE WHEN: user mentions "AWS", "Amazon Web Services", "Lambda", "DynamoDB", "SQS", "SNS", "CloudWatch", "IAM", "boto3", "aws-sdk" DO NOT USE FOR: S3 file operations - use `cloud-storage`; SQS messaging patterns - use `sqs`; Azure/GCP - use respective skills
development
blazor
Guidelines for Blazor development including component lifecycle, state management, and performance optimization
development
data-jupyter-python
Guidelines for data analysis and Jupyter Notebook development with pandas, matplotlib, seaborn, and numpy.
development
deep-learning-pytorch
Expert guidance for deep learning, transformers, diffusion models, and LLM development with PyTorch, Transformers, Diffusers, and Gradio.
development
django-python
Expert in Django Python web development with best practices
development
drizzle-orm
Guidelines for developing with Drizzle ORM, a lightweight type-safe TypeScript ORM with SQL-like syntax
development