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Infrastructure as Code (IaC) deployment expert for Apache Kafka. Guides Terraform deployments across Apache Kafka (KRaft mode), AWS MSK, Azure Event Hubs. Activates for terraform, iac, infrastructure as code, deploy kafka, provision kafka, aws msk, azure event hubs, kafka infrastructure, terraform modules, cloud deployment, kafka deployment automation.

Analyze product screenshots to extract feature lists and generate development task checklists. Use when: (1) Analyzing competitor product screenshots for feature extraction, (2) Generating PRD/task lists from UI designs, (3) Batch analyzing multiple app screens, (4) Conducting competitive analysis from visual references.

Software development lifecycle guidance. This skill should be used when planning development work, conducting code reviews, or establishing development workflows. Use proactively when reviewing code, preparing commits, creating pull requests, refactoring, or discussing development process and best practices. (user)

Expert in React Native testing strategies including unit tests with Jest, integration tests, E2E tests with Detox, component testing with React Native Testing Library, snapshot testing, mocking native modules, testing on simulators and real devices. Activates for testing, jest, detox, e2e, unit test, integration test, component test, test runner, mock, snapshot test, testing library, react native testing library, test automation.

Orchestrates complete machine learning pipelines within SpecWeave increments. Activates when users request "ML pipeline", "train model", "build ML system", "end-to-end ML", "ML workflow", "model training pipeline", or similar. Guides users through data preprocessing, feature engineering, model training, evaluation, and deployment using SpecWeave's spec-driven approach. Integrates with increment lifecycle for reproducible ML development.

Expert frontend developer for React, Vue, Angular, and modern web development. Covers components, hooks, state management, routing, forms, TypeScript, performance optimization, and best practices. Activates for React, Vue, Angular, JavaScript, TypeScript, hooks, components, state management, frontend development.

Guide for making code reviews. Use this when asked to make code reviews, or ask to use it before committing changes.

Proactively detects product/project descriptions and guides users through SpecWeave increment planning. Activates when user provides product name, features, tech stack, timeline, or problem description. Keywords: project, product, SaaS, app, MVP, build, new project, features, tech stack, core functionality, monetization, timeline, I want to build, let's build, quick build, core features.

Multi-framework UI testing expert - Cypress, Testing Library, component tests. Use for framework comparison, Cypress-specific testing, or React Testing Library. For DEEP Playwright expertise, use e2e-playwright skill instead. Activates for Cypress, Testing Library, component tests, React testing, Vue testing, framework comparison, which testing tool, Cypress vs Playwright.

Expert in Next.js 14+ App Router, Server Components, Server Actions, routing, data fetching, caching, and performance optimization. Activates for Next.js, Next, App Router, Server Components, RSC, Next.js 14, SSR, SSG, ISR, metadata, SEO.

Guide for working with gomponents, a pure Go HTML component library. Use this skill when reading or writing gomponents code, or when building HTML views in Go applications.

Comprehensive unit testing expertise covering Vitest, Jest, test-driven development (TDD), mocking strategies, test coverage, snapshot testing, test architecture, testing patterns, dependency injection, test doubles (mocks, stubs, spies, fakes), async testing, error handling tests, parametric testing, test organization, code coverage analysis, mutation testing, and production-grade unit testing best practices. Activates for unit testing, vitest, jest, test-driven development, TDD, red-green-refactor, mocking, stubbing, spying, test doubles, test coverage, snapshot testing, test architecture, dependency injection, async testing, test patterns, code coverage, mutation testing, test isolation, test fixtures, AAA pattern, given-when-then, test organization, testing best practices, vi.fn, vi.mock, vi.spyOn, describe, it, expect, beforeEach, afterEach.

Lightning Web Components development skill with PICKLES architecture methodology, component scaffolding, wire service patterns, event handling, Apex integration, GraphQL support, and Jest test generation. Build modern Salesforce UIs with proper reactivity, accessibility, dark mode compatibility, and performance patterns.

Apply language-specific style guide rules to your code. Use when writing or reviewing code to ensure consistency with best practices.

Visual regression testing expert using Playwright snapshots, Percy, Chromatic, BackstopJS, and pixel-diff analysis. Covers baseline management, responsive testing, cross-browser visual testing, component visual testing, and CI integration. Activates for visual regression, screenshot testing, visual diff, Percy, Chromatic, BackstopJS, pixel comparison, snapshot testing, visual testing, CSS regression.

Interactive wizard for creating Claude Code skills. Use when scaffolding new skills, validating skill structure, managing dependencies, or editing skill configuration files.

Security guidelines for secure coding and code review. This skill should be used when architecting/designing systems, writing code, or reviewing code. Use proactively when discussing vulnerabilities, OWASP, injection attacks, XSS, CSRF, SQL injection, authentication, authorization, access control, encryption, secrets management, input validation, or secure coding practices. (user)

Optimizes Pine Script for performance, user experience, and visual appeal on TradingView. Use when improving script speed, reducing load time, enhancing UI, organizing inputs, improving colors and visuals, or making scripts more user-friendly. Triggers on "optimize", "improve", "faster", "better UX", "clean up", or enhancement requests.

Creates comprehensive implementation plans for ANY type of SpecWeave increment (feature, hotfix, bug, change-request, refactor, experiment). Supports all work types from features to bug investigations to POCs. Activates for: increment planning, feature planning, hotfix, bug investigation, root cause analysis, SRE investigation, change request, refactor, POC, prototype, spike work, experiment, implementation plan, create increment, organize work, break down work, new product, build project, MVP, SaaS, app development, tech stack planning, production issue, critical bug, stakeholder request.

This skill should be used when writing or improving system prompts for AI agents, providing expert guidance based on Anthropic's context engineering principles.