Development

Make well-calibrated probability estimates using superforecasting methodology. Use when user asks about probability, likelihood, chance, odds, "will X happen", "when will X happen", "how much will X cost", "what could go wrong", failure modes, risk assessment, forecasting, or any question involving uncertainty and estimation.

Advanced Python testing strategies with Pytest, covering fixtures, matrix testing with parametrization, and async test architecture. Triggers: pytest, fixtures, parametrize, pytest-asyncio, matrix-testing, yield-fixture.

Build accessible user interfaces following WCAG 2.2 standards with proper semantic HTML, ARIA attributes, keyboard navigation, and screen reader support. Use this skill when creating or modifying UI components, forms, interactive elements, navigation menus, modals, or any frontend code that users interact with. Apply this skill when implementing keyboard navigation, focus management, color contrast requirements, alternative text for images, form labels, ARIA roles and landmarks, or when ensuring components work with assistive technologies like screen readers. This skill is essential when working with React, Vue, or other framework components, HTML templates, JSX files, or any UI implementation to ensure inclusive design that serves users with visual, auditory, motor, or cognitive disabilities and meets legal compliance standards (ADA, WCAG 2.2 Level AA).

HO lane discipline enforcement. Coordination-only tools. Prevents direct code implementation, enforces delegation to specialists. Auto-loads on /role ho activation. CRITICAL for preventing orchestrator drift into implementation.

React Native core patterns, navigation, state management, and performance optimization.

Generates comprehensive role-based permission matrices in markdown or SQL format for pages, components, and data access patterns. This skill should be used when designing authorization systems, documenting permissions, creating RBAC tables, or planning access control. Use for RBAC, role permissions, access control, authorization matrix, permission mapping, or security policies.

Deploys applications globally on Fly.io edge infrastructure with Firecracker VMs, multi-region deployment, and usage-based pricing. Use when deploying to multiple regions, running containers at the edge, or needing fast cold starts.

Use when working with or extending the local Codex MCP toolset/server that exposes HTTP endpoints for shell, filesystem, git, and Excel operations, or when a task should be executed by calling those MCP endpoints instead of local tools, especially if the MCP server is running.

This skill should be used when the user asks to "triage issue", "classify ticket", "route jira", "analyze priority", "categorize issue", "determine complexity", "route to agents", or needs guidance on classifying, prioritizing, and routing Jira issues to appropriate agents and workflows.

Use when creating reusable composables, managing reactive state, or implementing the Composition API. Load for useX patterns, Pinia store patterns, withLoadingState helper, lifecycle management, and type-safe state patterns. Covers composable structure, error handling, and testing composables.

Playwright E2E testing patterns for TaxHelper. Use for auth redirects, insights drill-down, mobile viewport checks, and PWA verification.

Scrape, crawl, search, and extract structured data from websites using Firecrawl API - converts web pages to LLM-ready markdown

Modify OpenAI ChatKit starter to use FastAPI backend instead of OpenAI API, including citation support and error handling.

Agentic workflow for cloning websites with pixel-perfect fidelity using specialized sub-agents. Use when the user wants to clone/copy/replicate a website, create a landing page based on an existing site, or needs to extract and recreate a website's design. Includes orchestration via slash command, four specialized sub-agents (screenshotter, extractor, cloner, qa-reviewer), and outputs React components with Tailwind CSS and motion animations.

TypeScript project initialization best practices

掌握高级提示工程技术，以最大化生产环境中LLM的性能、可靠性和可控性。在优化提示、改进LLM输出或设计生产提示模板时使用。

Implement SEO best practices in Next.js applications. Includes metadata, Open Graph tags, canonical URLs, sitemap generation, schema markup, and performance optimization for search ranking.

Create and add UI elements with Tailwind CSS v3 using best practices. Automatically fetches up-to-date Tailwind documentation via Context7 MCP. Use when building new UI components, forms, layouts, or modifying existing interface elements.

Expert in Model Context Protocol (MCP) server development. Use when building MCP servers, creating tools for Claude, implementing resources, debugging MCP connections, or integrating databases with Claude Code.

Use when implementing iOS 26 features (Liquid Glass, new SwiftUI APIs, WebView, Chart3D), deploying iOS 26+ apps, or supporting backward compatibility with iOS 17/18.