Unit Testing

Use when writing tests with Swift Testing (@Test,

Validate inputs and preconditions before work begins using symmetric validation across layers, allowlist thinking, and contextual business rules with auditability. Use this skill when writing input validation, form handling, API request validation, or domain logic checks. Applies to all boundary validation requiring structured error responses, edge-case coverage, sanitization, escaping, and contract tests ensuring consistent validation across clients, APIs, background jobs, and CLIs.

Expert knowledge for Testing Layer modeling in Documentation Robotics

React 18+ development patterns including components, hooks, state management, API integration, and accessibility. Use when: (1) building React components, (2) designing user interfaces, (3) implementing state management, (4) writing frontend tests.

Harness CI (Continuous Integration) for container-native builds, test intelligence, caching, parallelization, and build infrastructure management. Activate for build pipelines, CI steps, test automation, artifact publishing, and build optimization.

Containerizes applications with Docker, docker-compose, and Helm charts.Use when creating Dockerfiles, docker-compose configurations, or Helm charts for Kubernetes.Includes Docker Hardened Images (95% fewer CVEs), multi-stage builds, and 15+ battle-tested gotchas.

Analyze llm-compact-logger test output and configure enhancements. Use when user shares debug-compact.json or debug-report.json files.

Unconventional problem-solving with chaotic good energy. Finds creative edge cases, challenges assumptions, explores weird solutions that technically work. Use when you want creative chaos, alternative approaches, or to test if "normal" is actually optimal.

Apply systematic debugging methodology using medical differential diagnosis principles. Trigger when AI modifies working code and anomalies occur, or when users report unexpected test results or execution failures. Use observation without preconception, fact isolation, differential diagnosis lists, deductive exclusion, experimental verification, precise fixes, and prevention mechanisms.

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.