Unit Testing

Build FastAPI applications using Clean Architecture principles with proper layer separation (Domain, Infrastructure, API), dependency injection, repository pattern, and comprehensive testing. Use this skill when designing or implementing Python backend services that require maintainability, testability, and scalability.

End-to-end frontend testing with Playwright Java and Chromium. Use for UI validation, form testing, API interaction verification, and screenshot capture on failures.

Generate persistent test cases from project analysis, or add individual test cases interactively. Supports full project analysis or adding single test cases via prompt description with browser exploration.

Guide for testing EDS blocks using test.html files and the development server. Covers test file structure, EDS core integration, testing patterns, and debugging workflows for Adobe Edge Delivery Services blocks.

Generates src/App.vue root component with unit test. Creates both App.vue and App.spec.ts files.

Manage git worktrees with shell scripts for listing, creating, and deleting worktrees. Use when working with git repositories and need to create worktrees with new branches, delete existing worktrees, or view all worktrees. Particularly useful for parallel feature development or testing multiple branches simultaneously.

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.

Provides expert guidance for NautilusTrader algorithmic trading platform. Covers backtesting strategies, live trading deployment, event-driven architecture, and building trading systems.

テスト計画・実行・報告を標準化する運用スキル。

Comprehensive test-driven development for Terraform providers with iterative co-development of tests, generators, and schemas. NEVER skip development or refactoring - always fix root causes in generators, schemas, or test code. Only skip resources requiring external credentials (AWS/Azure/GCP) or premium licensing. Uses terraform-plugin-testing SDK with modern assertion patterns.

PostgreSQL expert for .sql migration files, CREATE TABLE, ALTER TABLE, indexes, constraints, foreign keys, schema changes, docker/postgres/migrations/, init.sql, idempotent SQL, transactions, BEGIN/COMMIT, psql, database testing, schema_migrations

Execute TDD red-green-refactor cycle with just verify gate. Use when writing new features or fixing bugs that require test coverage.

DDDアーキテクチャでFastAPIのバックエンドを新規実装または既存コードベースをリファクタリングする際のガイド。レイヤー構成（domain/application/infrastructure/controller）、依存方向、責務境界、pydantic/sqlalchemy(sqlmodel)/alembic/pytestの前提、セッション管理（Dependsで1リクエスト1セッション、必要時UoW）を含む。

TypeScript strictest patterns, type guards, optional properties (exactOptionalPropertyTypes), Drizzle query safety, null checks. Use when fixing type errors, implementing complex types, or when user mentions TypeScript/types/generics.

Analyze test coverage, identify gaps, suggest strategic test cases. Use when writing features, after bug fixes, or during test reviews. Ensures comprehensive coverage without over-testing.

Generate GitHub Actions workflow for beta testing track deployment

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.

Guide for testing Firebase Admin SDK with Vitest mocks. Use when writing tests that involve Firebase Auth, Firestore, or Firebase App.

Practical guide for building production ML systems based on Chip Huyen's AI Engineering book. Use when users ask about model evaluation, deployment strategies, monitoring, data pipelines, feature engineering, cost optimization, or MLOps. Covers metrics, A/B testing, serving patterns, drift detection, and production best practices.

Create a 24-hour tactical market brief from the latest macro and financial news, covering equities, commodities, and macro/FX. Use when asked for a market brief, daily/24h outlook, short-term drivers, or a structured multi-asset summary with JST timestamps and strict short-line formatting.