Backend

Comprehensive software architecture skill for designing scalable, maintainable systems using ReactJS, NextJS, NodeJS, Express, React Native, Swift, Kotlin, Flutter, Postgres, GraphQL, Go, Python. Includes architecture diagram generation, system design patterns, tech stack decision frameworks, and dependency analysis. Use when designing system architecture, making technical decisions, creating architecture diagrams, evaluating trade-offs, or defining integration patterns.

Action-oriented architecture for Laravel. Invokable classes that contain domain logic. Use when working with business logic, domain operations, or when user mentions actions, invokable classes, or needs to organize domain logic outside controllers.

Create custom node definitions with renderers, ports, external data, and constraints. Use when implementing new node types, custom node appearances, or node-specific behaviors.

World-class Java and Spring Boot development skill for enterprise applications, microservices, and cloud-native systems. Expertise in Spring Framework, Spring Boot 3.x, Spring Cloud, JPA/Hibernate, and reactive programming with WebFlux. Includes project scaffolding, dependency management, security implementation, and performance optimization.

Configures and integrates SAP Master Data Integration (MDI) service on SAP Business Technology Platform. Use when setting up MDI tenants, connecting applications (S/4HANA, SuccessFactors, Ariba, Fieldglass, etc.), configuring distribution models, SOAP APIs for business partners, extensibility, or troubleshooting master data replication. Covers One Domain Model integration, Business Data Orchestration, client authentication (OAuth2, mTLS), and security configurations.

Comprehensive backend development skill for building scalable backend systems using Node.js, Express, Go, Python, PostgreSQL, GraphQL, REST APIs. Includes API scaffolding, database optimization, security implementation, and performance tuning. Use when designing APIs, optimizing database queries, implementing business logic, handling authentication/authorization, or reviewing backend code.

Use when building real-time features with SSE, WebSockets, or streaming APIs. Covers backpressure handling, reconnection strategies, and LLM token streaming patterns.

Automated documentation maintenance for Vigil Guard v2.0.0's documentation files. Use for syncing docs with code changes, version updates, API generation, cross-reference validation, 3-branch architecture docs, and documentation creation.

Search code using Sourcegraph CLI. Use when (re)searching codebases, finding implementation examples, analyzing code patterns

Multi-tenant application architecture patterns. Use when working with multi-tenant systems, tenant isolation, or when user mentions multi-tenancy, tenants, tenant scoping, tenant isolation, multi-tenant.

Vigil Guard v2.0.0 project-specific code audit context. Maps 10 audit categories to specific directories, files, and technologies. Includes custom checks for 3-branch parallel detection pipeline (24 nodes), Presidio PII detection, ClickHouse analytics with branch scoring, and heuristics-service patterns.

Background jobs and event listeners for async processing. Use when working with queued jobs, background processing, events, or when user mentions jobs, queues, listeners, events, async processing.

VCR.py HTTP recording for Python tests. Use when testing Python code making HTTP requests, recording API responses for replay, or creating deterministic tests for external services.

Authorization policies for resource access control. Use when working with authorization, permissions, access control, or when user mentions policies, authorization, permissions, can, ability checks.

Reviews Deep Agents code for bugs, anti-patterns, and improvements. Use when reviewing code that uses create_deep_agent, backends, subagents, middleware, or human-in-the-loop patterns. Catches common configuration and usage mistakes.

Immutable value objects for domain values. Use when working with domain values, immutable objects, or when user mentions value objects, immutable values, domain values, money objects, coordinate objects.

Form request validation and comprehensive validation testing. Use when working with validation rules, form requests, validation testing, or when user mentions validation, form requests, validation rules, conditional validation, validation testing.

LangGraph state management patterns. Use when designing workflow state schemas, using TypedDict vs Pydantic, implementing accumulating state with Annotated operators, or managing shared state across nodes.

Create or improve Makefiles with minimal complexity. Templates available: base, python-uv, python-fastapi, nodejs, go, chrome-extension.

Check available messaging channels, channel capabilities, and channel configuration for Sinch Conversation API. Use when the user asks which channels are available, what channels can be used, how to reach someone, what messaging options exist, or channel capabilities for a contact or app.