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Creates Vaadin Browserless server-side unit tests for Vaadin views covering navigation, component interactions, form validation, grid operations, and notifications. Use when the user asks to "write Browserless tests", "write Vaadin UI unit tests", "unit test a Vaadin view without a browser", "create view tests with the official Vaadin testing framework", or mentions Browserless testing, SpringBrowserlessTest, browserless-test-junit6, UI Unit Testing, or server-side Vaadin testing.

Generates bUnit component unit and integration tests for Blazor components (.razor). Use when the user asks to "write bUnit tests", "test Blazor component", "create UI test for Blazor", or mentions bUnit, Blazor component testing, or xUnit rendering tests.

Generates C# backend unit and integration tests for EF Core DbContext repositories, domain services, and vertical slice handlers using xUnit / NUnit. Use when the user asks to "write unit tests for C#", "test ef core context", "write integration tests for dotnet", or mentions xUnit backend tests.

Creates Drizzle ORM schema definitions and generated SQL migrations for PostgreSQL from the entity model. Use when the user asks to "create a migration", "generate SQL", "set up database tables", "update the schema", or mentions Drizzle, drizzle-kit, pg-core, schema.ts, or database versioning for a NestJS project.

Generates Entity Framework Core (EF Core) database migrations for C# / .NET projects based on the entity model specification in docs/entity_model.md. Use when the user asks to "create database migration", "add ef migration", "update schema with ef core", "generate db migration for .net", or mentions EF Core, DbContext, or database migrations in C#.

Creates entity model documents with Mermaid.js ER diagrams and attribute tables defining entities, relationships, data types, and validation rules. Use when the user asks to "create an entity model", "design a data model", "draw an ERD", "define database schema", "model entities", or mentions entity-relationship diagram, ER diagram, database design, or data modeling. Also trigger whenever the task is to produce, write, or design an entity model or data model document (e.g. docs/entity_model.md) from a requirements catalog — including phrasings like "data model design", "the team needs an entity model before development", or a request to document entities with attributes, data types, precision, and validation or cross-attribute constraints.

Creates versioned Flyway database migration scripts (V*.sql) with sequences, tables, constraints, and foreign keys from the entity model. Use when the user asks to "create a migration", "generate SQL scripts", "set up database tables", "write a Flyway migration", or mentions schema migration, DB migration, database versioning, or SQL migration files.

Creates versioned Flyway database migration scripts (V*.sql) with sequences, tables, constraints, and foreign keys from the entity model. Use when the user asks to "create a migration", "generate SQL scripts", "set up database tables", "write a Flyway migration", or mentions schema migration, DB migration, database versioning, or SQL migration files.

Implements use cases by creating Vaadin Flow views, forms, and grids — server-side Java UI — and jOOQ queries for the data access layer. Use when the user asks to "implement a use case", "build the UI", "create a Vaadin view", "write the data access layer", or mentions Vaadin Flow, server-side Java views, jOOQ queries, Java web app, or database-backed UI. For Hilla (React/TypeScript) views use the implement-hilla skill instead.

Implements use cases across a NestJS backend with Drizzle ORM over PostgreSQL and a Next.js App Router frontend wired to that API. Use when the user asks to "implement a use case", "build the API", "create a REST endpoint", "write the data access layer", "build the page", or mentions NestJS modules, controllers, providers, Drizzle queries, repositories, or a Next.js frontend calling a NestJS backend.

Implements use cases for C# and Blazor (.NET 10) applications using a Vertical Slice Architecture. Takes a UC-XXX.md specification and generates feature-folder components, C# Commands/Queries, EF Core entities/configurations, and Blazor pages/components. Use when the user asks to "implement a use case in C#", "build a Blazor page", "create a Vertical Slice", or mentions Blazor, .NET 10, or C# implementation.

Implements use cases across a Spring Boot + Spring Data JPA backend (flat single-module or hexagonal/ports-and-adapters multi-module) and an Angular frontend wired to that API. Use when the user asks to "implement a use case", "build the API", "create a REST endpoint", "write the data access layer", "build the Angular page/component", or mentions Spring Boot, JPA/Hibernate entities, hexagonal architecture, ports and adapters, or an Angular frontend calling a Java backend.

Creates Karibu server-side unit tests for Vaadin views covering navigation, component interactions, form validation, grid operations, and notifications. Use when the user asks to "write Karibu tests", "unit test a Vaadin view", "test the UI server-side", "create view tests", or mentions Karibu testing, Vaadin unit tests, or server-side UI testing.

Creates NestJS backend tests with Vitest — unit specs with stubbed repositories, and Supertest end-to-end specs that boot the application against a real PostgreSQL database in Testcontainers. Use when the user asks to "write backend tests", "test the API", "write an e2e test", "test the endpoint", or mentions Supertest, Testcontainers, NestJS testing, or Vitest for a NestJS project.

Creates Playwright browser-based tests for Vaadin views using the Drama Finder library for type-safe element wrappers with accessibility-first APIs. Covers two test types: integration tests for a single use case (UC-*) and end-to-end journey tests for a test case (TC-*) spanning multiple use cases. Use when the user asks to "write Playwright tests", "create e2e tests", "write integration tests", "test in the browser", "write IT tests", "automate a test case", "test a user journey", or mentions end-to-end testing, browser tests, UI integration tests, Playwright for Vaadin, or Drama Finder. Also trigger when the user references a use case (UC-*) or a test case (TC-*) and asks for Playwright or E2E tests.

Creates Playwright browser-based end-to-end tests for a Next.js frontend running against a live NestJS API, using accessibility-first locators. Use when the user asks to "write Playwright tests", "create e2e tests", "test in the browser", or mentions end-to-end testing, browser tests, or a test case (TC-*) to automate.

Generates native C# Playwright end-to-end (E2E) browser tests for user journeys (UC-* / TC-*) using Microsoft.Playwright.Xunit. Use when the user asks to "write e2e test", "create playwright test for dotnet", "write browser test in C#", or mentions Playwright with .NET.

Creates Playwright browser-based end-to-end tests for Angular views using Playwright's native accessibility-first locators (getByRole, getByLabelText, getByText). Use when the user asks to "write Playwright tests", "create e2e tests", "write integration tests", "test in the browser", or mentions end-to-end testing, browser tests, or UI integration tests for this stack. Also trigger when the user references a use case (UC-*) and asks for Playwright or E2E tests.

Gathers, organizes, and documents software requirements into structured catalogs with functional requirements (user stories), non-functional requirements (measurable quality attributes), and constraints. Use when the user asks to "write requirements", "create a PRD", "gather requirements", "document feature specs", "write user stories", "define NFRs", "list constraints", or mentions requirements catalog, requirements analysis, product requirements document, or feature specification.

Reverse-engineers an existing software project into AI Unified Process artifacts: a PlantUML use case diagram, per-use-case specification documents, and an entity model with a Mermaid ER diagram. Use when the user asks to "reverse engineer this codebase", "extract use cases from existing code", "document the system we already have", "generate use case specs from controllers", "derive an entity model from the database", "create AI Unified Process artifacts from a legacy project", or mentions reverse engineering, legacy documentation, or onboarding an inherited codebase. Trigger this skill whenever a user wants to produce use cases, an ER diagram, or a use case diagram from code that already exists rather than from a fresh vision document — even if they don't say "reverse engineer" explicitly.