Backend

Comprehensive expert on TravelPay payment processing API with deep domain knowledge, workflow expertise, and production-ready code generation capabilities

Create Django REST Framework API endpoints using APIView. Use when creating new endpoints, adding views, implementing CRUD operations, or building new API features. Follows project patterns with custom response handlers and error handling.

MANDATORY for ANY questions about Acme Corp internal product codes, employee IDs, server names, project codes, or internal systems. Contains proprietary company data NOT available in public documentation.

Common Shopify Admin GraphQL API patterns for product queries, metafield operations, webhooks, and bulk operations. Auto-invoked when working with Shopify API integration.

.NET/C#のコーディング規約、命名規則、レイアウト、C# 12/13/14の最新機能活用ガイドラインを定義する。C#/.NETコード作成時、クラス・メソッド命名時、コードフォーマット時、またはユーザーがコーディング規約、命名規則、C#ベストプラクティス、Primary Constructors、Collection Expressions、field キーワードに言及した際に使用する。

View Flask server logs from local or remote server. Shows real-time or recent log entries for debugging. Use when monitoring server activity, debugging issues, or checking server status.

Generate documentation from code, create API references, update README files, and maintain project documentation. Use when user says "document this", "generate docs", "update README", "create API docs", or when documentation is needed.

Periodic task scheduling patterns with Celery Beat (crontab, interval, solar). Use when configuring periodic tasks, setting up task schedules, implementing recurring jobs, configuring django-celery-beat, or creating dynamic schedules.

Create and manage database migrations with reversible changes, zero-downtime deployments, and proper version control practices. Use this skill when creating database migration files, schema change scripts, or any files that modify database structure. Use this when writing migration files with up/down methods, implementing rollback strategies, creating or modifying database tables, adding or removing columns, creating indexes, or handling data migrations separately from schema changes. Use this when working on files in migration directories like db/migrate/, migrations/, or database/migrations/, or when modifying schema definition files.

Node.js/Express/TypeScript microservices development. Layered architecture (routes → controllers → services → repositories), BaseController, error handling, Sentry monitoring, Prisma, Zod validation, dependency injection. USE WHEN creating routes, controllers, services, repositories, middleware, API endpoints, database access, error tracking.

Comprehensive node reference documentation for all 110+ Kailash SDK nodes organized by category: AI, API, Code, Data, Database, File, Logic, Monitoring, Admin, Transaction, and Transform nodes. Use when asking about 'node reference', 'available nodes', 'node list', 'AI nodes', 'API nodes', 'code nodes', 'data nodes', 'database nodes', 'file nodes', 'logic nodes', 'monitoring nodes', 'transaction nodes', 'transform nodes', 'which nodes', 'node documentation', or 'node capabilities'.

Deploys applications on Railway with zero-config detection, databases, and automatic CI/CD. Use when deploying Node.js apps, setting up databases, or needing simple PaaS deployment.

Validate website parsing and browser automation feasibility by browsing and searching within a user-specified website scope using the chrome-devtools MCP server (mcp_servers.chrome-devtools); summarize results backed by observed page content (real titles/URLs), and open matching pages for review. Use when the user asks you to open a site, find specific content on it, run a site-scoped query, and keep the relevant pages open.

Comprehensive NestJS framework skill for building scalable server-side applications. Use for TypeScript backend development with controllers, providers, modules, dependency injection, middleware, guards, interceptors, pipes, database integration (MikroORM + MongoDB), GraphQL, microservices, testing, and API documentation. Also triggers when working with NestJS TypeScript files (.ts), NestJS module files, nest-cli.json, or NestJS project structure. Example triggers: "Create NestJS controller", "Set up dependency injection", "Add middleware", "Create GraphQL resolver", "Build microservice", "Write NestJS test", "Set up database module"

Instrumenting Go applications with OpenTelemetry for distributed tracing, Prometheus for metrics, and structured logging with slog. Covers auto-instrumentation, health checks, and graceful shutdown. Use when adding observability to microservices or debugging production issues.

Embed the chatbot UI inside Docusaurus and connect it to the FastAPI RAG backend. Use when building chat components, handling streaming responses, or integrating chat widgets into MDX pages.

Extract design data from Figma files using REST API scripts. Includes frame extraction, metadata retrieval, screenshots, design token extraction, annotations, and FigJam content for design-to-code workflows.

Generate, explain, and test regular expressions with examples and test cases. Use when creating regex patterns or understanding complex regular expressions.

Start-of-day setup and readiness routine. Calculates Ready to Code Score (0-100) based on session restoration, service health, dependency updates, branch sync, PR reviews, and issue triage. Automatically captures session state to STATUS.json. Use at start of work day after opening Claude Code.

Expert for lenne.tech CLI (lt command). ALWAYS activate when user mentions "lt", "lt CLI", "lenne.tech CLI", fullstack workspace, local templates, or any lt command. Provides comprehensive reference for all lt CLI features including fullstack init, git workflows, server creation, and advanced options. Works alongside generating-nest-servers for NestJS development tasks.