Unit Testing

Use this skill when working with TypeScript/JavaScript files (.ts, .tsx, .js, .jsx, .mts, .cts, .mjs, .cjs) in Deno projects, or when the user asks about Deno-specific patterns, imports, configuration, testing, or tooling.

Comprehensive testing and quality assurance specialist for ensuring code quality through testing strategies

Web application testing toolkit using Playwright with Python. Use for verifying frontend functionality, debugging UI behavior, capturing browser screenshots, viewing browser logs, and automating web interactions.

Эксперт iOS тестирования. Используй для XCTest, UI testing и iOS test patterns.

Screenshot testing for React components with Playwright. Captures component pixels and compares to baselines. Auto-apply when editing React component stories or *.visual.spec.ts files that test UI components.

WHEN: Coverage analysis, finding untested files, test prioritization, coverage gap identificationWHAT: Line/Branch/Function coverage + untested file list + priority by importance + improvement roadmapWHEN NOT: Test generation → test-generator, Test quality → code-reviewer

Complete browser automation with Playwright. Auto-detects dev servers, writes clean test scripts to /tmp. Test pages, fill forms, take screenshots, check responsive design, validate UX, test login flows, check links, automate any browser task. Use when user wants to test websites, automate browser interactions, validate web functionality, or perform any browser-based testing.

Get today's date for web searches and date-sensitive tasks. Auto-invoke before any WebSearch that includes a year (e.g., "React 2024", "Python 2025"), when searching for current documentation, latest releases, or recent information. Ensures searches use the correct current year instead of outdated dates.

Use when implementing any feature or bugfix. Write the test first, watch it fail, write minimal code to pass. Red-Green-Refactor cycle.

Build accessible user interfaces following WCAG guidelines with semantic HTML, keyboard navigation, screen reader support, and proper color contrast. Use this skill when creating or modifying UI components, implementing form inputs, adding interactive elements, working with navigation menus, creating modals or dialogs, or handling focus management. Apply when working on React component files (*.tsx, *.jsx), Shadcn/ui components, or any frontend code that users interact with. This skill ensures semantic HTML elements (nav, main, button, etc.) that convey meaning to assistive technologies, keyboard navigation with visible focus indicators (focus:ring-2 focus:ring-offset-2 in Tailwind), sufficient color contrast ratios (4.5:1 for normal text), descriptive alt text for images and meaningful labels for form inputs, screen reader testing and verification, ARIA attributes for complex components when semantic HTML isn't sufficient, logical heading structure (h1-h6 in proper order), and proper focus management in dyna

バックエンド（Rust/Tauri）のテスト実装とデバッグを行います。Rustのテスト作成、cargo testの実行、テストエラーの修正、Repository/Service/Facadeレイヤーのテストなどのバックエンドテスト関連タスクに使用します。

Author high-quality assessment items (questions, prompts, tasks) aligned to learning objectives with answer keys and rubrics. Use when creating test questions, writing assessment items, or building item banks. Activates on "write assessment items", "create test questions", "develop quiz", or "author performance tasks".

use this skill when creating new or reviewing xunit v3 test projects using Microsoft Testing Platform (MTP) to ensure best patterns, practices, and proper configuration

Stop the iOS app running on connected iPhone. Cleanly terminates the app using SIGTERM. Use when stopping the app for debugging, testing, or cleanup.

Spin up local servers and execute dynamic user acceptance testing with Playwright. This skill starts the full stack (backend + frontend), constructs user journeys based on what was just built, and verifies functionality in a real browser.

Refactor complex Android/KMP state management code to use FlowRedux state machine pattern. Use this when developers need to transform tangled state logic, multiple LiveData/StateFlow sources, or callback-heavy code into a clean, testable state machine architecture.

Build MCP (Model Context Protocol) servers with tools, prompts, and resources. Use when developing MCP servers, implementing tools/prompts/resources, debugging MCP issues, writing tests, or deploying servers. Covers SDK patterns, validation, and best practices.

テストコード作成と品質保証の規約

Write domain and unit tests for the widget host app. Use when testing entities, value objects, invariants, domain services, and application logic with deterministic fixtures.

Use PROACTIVELY when creating Model Context Protocol servers for connecting AI applications to external data sources, tools, and workflows. Generates production-ready MCP servers with TypeScript/Python SDKs, configuration templates, and Claude Desktop integration. Includes testing workflow with MCP Inspector. Not for modifying existing MCP servers or non-MCP integrations.