Unit Testing

Bootstraps complete backend with Apso, including API setup, database configuration, and testing. Triggers when user needs to create backend, setup API, or initialize server.

Reference and maintain the project's technology stack including frameworks, languages, databases, testing tools, and third-party services to ensure consistency across the codebase. Use this skill when making technology decisions, adding new dependencies, choosing appropriate tools or libraries, configuring build systems, setting up testing frameworks, or documenting the tech stack. Apply this skill when selecting which framework, library, or tool to use for a given task, when ensuring code follows the conventions of the chosen stack (React patterns, Python idioms, Rails conventions), when integrating third-party services, or when documenting technology choices in README or architecture documentation. This skill ensures all team members use consistent technologies, new additions align with existing stack decisions, technology choices are documented with rationale, and the project maintains coherent patterns rather than mixing conflicting approaches or frameworks.

Use to avoid critical testing mistakes. Five Iron Laws: Never test mock behavior, Never add test-only methods, Never mock without understanding, Always integration test, Always test error paths.

Official NestJS starter with modular architecture and Jest testing.

Implement comprehensive testing strategies with pytest, fixtures, mocking, and test-driven development. Use when writing Python tests, setting up test suites, or implementing testing best practices.

Battle-tested automation patterns for GitHub Actions, Argo, and Kubernetes. Build resilient, idempotent workflows that scale with hub-and-spoke design.

Root package.json configuration for MetaSaver monorepos. Use when creating or auditing root package.json files to ensure workspace configuration, required scripts (build, dev, lint, test, format, clean), turbo pipeline scripts, packageManager field, and only devDependencies at root (no dependencies except cross-platform binaries).

Analyze test coverage and add new test cases to improve coverage without changing implementation

Complete knowledge domain for Cloudflare Browser Rendering - Headless Chrome automationwith Puppeteer and Playwright on Cloudflare Workers for screenshots, PDFs, web scraping,and browser automation workflows.Use when: taking screenshots, generating PDFs from HTML or URLs, web scraping content,crawling websites, browser automation tasks, testing web applications, managing browser sessions,performing batch browser operations, integrating with AI for content extraction, or encounteringbrowser rendering errors, XPath selector errors, browser timeout issues, concurrency limits,memory exceeded errors, or "Cannot read properties of undefined (reading 'fetch')" errors.Keywords: browser rendering cloudflare, @cloudflare/puppeteer, @cloudflare/playwright,puppeteer workers, playwright workers, screenshot cloudflare, pdf generation workers,web scraping cloudflare, headless chrome workers, browser automation, puppeteer.launch,playwright.chromium.launch, browser binding, session management, puppeteer.sessions,

Publishes hdwallet packages locally to verdaccio and updates them in the web repo. Use when you need to publish hdwallet locally, publish to verdaccio, run the verdaccio publish pipeline, or test hdwallet changes locally.

Use this skill whenever the user wants to set up, refactor, or maintain a GitHub Actions CI/CD pipeline for deploying Cloudflare Workers/Pages apps (e.g. Hono + TypeScript) with D1/R2, including tests, build, migrations, and multi-environment deploys.

CDI and Quarkus development standards for CUI projects, including CDI aspects, container configuration, testing, and native optimization

Comprehensive QA and testing skill for quality assurance, test automation, and testing strategies for ReactJS, NextJS, NodeJS applications. Includes test suite generation, coverage analysis, E2E testing setup, and quality metrics. Use when designing test strategies, writing test cases, implementing test automation, performing manual testing, or analyzing test coverage.

Test Zod schemas comprehensively with unit tests, integration tests, and type tests for validation logic

Test TUI (Text User Interface) applications using tmux. Use this skill when you need to automate testing of terminal-based applications by sending keystrokes and capturing pane output.

Use when reviewing test suites, after test runs pass, or when user asks about test quality - performs exhaustive line-by-line audit tracing code paths through entire program, verifying tests actually validate what they claim. Outputs structured report compatible with fix-tests skill.

Setup UI Automator 2.4 smoke test for validating app launches (works with debug and release builds)

Generates Husky Git hooks configuration with pre-commit checks. Creates .husky/pre-commit file for running linting, testing, and formatting before commits.

Develop Python applications using modern patterns, uv, and functional-first design. Activate when working with .py files, pyproject.toml, uv commands, or user mentions Python, itertools, functools, pytest, mypy, ruff, async, or functional programming patterns.

30 pragmatic rules for production JavaScript covering async operations, V8 optimization, memory management, testing, error handling, and performance. Use when writing JavaScript, optimizing performance, handling promises, or building production-grade applications. Includes promise rejection handling, V8 hidden classes, memory leak prevention, and structured testing patterns.