Unit Testing

Comprehensive guide for building serverless applications with Cloudflare Workers. Use when developing Workers, configuring bindings, implementing runtime APIs, testing Workers, using Wrangler CLI, deploying to production, or building edge functions with JavaScript/TypeScript/Python/Rust.

Create and maintain Histoire stories for Vue 3 components. Use when working with .story.vue files, creating visual contracts, or when user mentions Histoire stories or visual testing.

General-purpose browser automation skill for Playwright. Use this skill when the user wants to automate browser tasks like testing login flows, scraping data, taking screenshots, filling forms, clicking elements, or any interactive web automation. This skill provides smart utilities for session management, error handling, and development server detection. NOT for scheduled monitoring (use web-monitor-bot instead).

Python development best practices for modern Python projects. Activated when working with Python files, pyproject.toml, or discussing Python patterns, testing, linting, type hints.

Critiques your paper draft as a skeptical reviewer would. Use when asked to review a paper draft, find weaknesses in a paper, prepare for peer review, anticipate reviewer criticism, or stress-test research before submission. Identifies weak claims, missing baselines, unclear explanations, and overclaims.

A test skill for validation

⚡ PRIMARY TOOL for: 'comprehensive audit', 'deep analysis', 'full codebase review', 'multi-perspective investigation', 'complex questions'. Combines ALL detective perspectives (architect+developer+tester+debugger). Uses Opus model. REPLACES grep/glob entirely. Uses claudemem v0.3.0 AST with ALL commands (map, symbol, callers, callees, context). GREP/FIND/GLOB ARE FORBIDDEN.

Use Lockplane for safe database schema management - define schemas in .lp.sql files, validate, and apply with shadow DB testing

Resolve disagreements between agents or approaches using test-based adjudication. Use when agents disagree, when multiple valid approaches exist, when the user asks "which approach", or when making architectural decisions with tradeoffs.

Supabase backend development: database, RLS, Edge Functions, queries.USE WHEN: creating tables, migrations, RPC functions, Edge Functions,RLS policies, query optimization, Supabase infrastructure.NOT FOR: Flutter UI (use flutter-developer), tests (use testing-agent).Examples:<example>Context: The user needs to create a new database table.user: "Create a table for customer reviews with ratings and comments"assistant: "I'll use the backend-dev skill to design the reviews table with RLS policies."<commentary>Database table creation requires backend-dev.</commentary></example><example>Context: The user needs server-side business logic.user: "Create an Edge Function to calculate dynamic pricing"assistant: "I'll use backend-dev to develop the Edge Function for pricing."<commentary>Edge Functions are a core backend-dev responsibility.</commentary></example>

CRITICAL: Use this skill when creating/debugging React UI components, Radix UI, forms, modals, or drag & drop.AUTO-ACTIVATE when user mentions (FR/EN): - select, Select, SelectValue, SelectItem, Radix - modal, modale, dialog, Dialog, DialogContent - form, formulaire, validation, Zod, React Hook Form, shadcn - drag, drop, DnD, @dnd-kit, sortable, réordonner - UI bug, composant, component, affiche ID, shows ID, undefined - Button, Input, Label, Checkbox, Switch, Badge, Card - créer composant, create component, nouveau composantThis skill contains TESTED patterns for Radix UI Select (ID vs Name), Modal CRUD templates, Drag & Drop with @dnd-kit, Form validation with Zod + shadcn/ui Form.

A test skill in markdown format

Generates comprehensive unit tests for code

Safe code refactoring combining Sherpa's refactor workflow, Julie's reference checking and safe renaming, and Goldfish's before/after checkpointing. Activates for code improvement with systematic testing, refactoring, and verification. Use when cleaning up or improving existing code.

Work with pytest-recording (VCR.py) for recording and replaying HTTP interactions in tests. Use when writing VCR tests, managing cassettes, configuring VCR options, filtering sensitive data, or debugging recorded HTTP responses.

Write Playwright E2E tests using fixtures and best practices. Use when creating E2E tests, writing browser automation tests, or testing user flows.

Create androidTest directory structure with base classes and utilities

Enterprise Shell scripting with Bash 5.2, ShellCheck, bats-core testing, POSIX compliance, and Context7 MCP integration for defensive scripting patterns.

This skill should be used when the user asks to "write XCUITest", "create UI tests", "fix flaky tests", "query XCUIElements", "implement Page Object pattern", or mentions XCUITest, UI testing for iOS/macOS apps. Targets experienced iOS developers who want best practices and efficiency improvements.

AI-native E2E testing orchestration for Claude Code. Use when creating, running, or managing end-to-end test scenarios with visual evidence capture. Activates for tasks involving E2E tests, browser automation testing, test scenario creation, test execution with screenshots, or checking test status.