Find the perfect skill
PR Review
Development
Reviews code changes before merging with focus on quality, security, and consistency. Lets you select the review scope (staged, unstaged, branch vs main) and automatically runs security and quality scanners based on the detected stack (Node.js, Python, Docker, Terraform, etc.). Best used for pull request reviews, pre-commit validation, or merge readiness checks.
Mobile Offline Support
Development
Implements offline-first capabilities for mobile apps using local storage (AsyncStorage, Realm, SQLite). Supports background data synchronization, conflict resolution, and queuing actions when offline. Ideal for building responsive apps that work reliably without constant internet connectivity.
Astro Design (Islands & HTML-First)
Development
Skill for designing, implementing, and reviewing Astro projects with an HTML-first, Islands-based, JavaScript-minimizing approach. Used when a repository's doc/input/rdd.md includes '技術スタック Astro', or when the user asks about Astro, Islands, SSG, SSR, or performance optimization.
Research Philosophical Topic
Content
Conducts web research on a philosophical topic and outputs structured research notes in Markdown. Use before writing an article, when a todo item is type `research-topic`, or when `/research-topic [topic]` is invoked. It identifies key sources, major positions, debates, historical context, and evaluates alignment with site tenets.
Condense Article
Content
This skill intelligently reduces the word count of overly long articles while preserving their core arguments, unique insights, and distinctive voice. It eliminates redundancy, tangential sections, excessive hedging, and over-attribution, while keeping essential elements like the opening summary, unique arguments, and site perspective. Use it when an article exceeds the target word count for its section (e.g., concepts: 2500 words, topics: 3000 words).
Frontend CSS Tailwind
Development
Guides writing consistent, maintainable CSS using Tailwind utility classes and design system tokens. Helps minimize custom CSS by leveraging framework utilities, and ensures production optimization through tree-shaking and purging. Best used when implementing Tailwind in React components, configuring theme extensions, or maintaining design consistency.
Sync Skills
DevOps
Automatically syncs configuration files (README, CLAUDE.md, settings.json, hal_dotfiles.json) with discovered skills.
gRPC Protocol Implementation & Optimization
Development
Expert skill for gRPC protocol implementation, stub generation, and performance optimization. Covers debugging, bidirectional streaming, and gRPC-Web configuration.
Generate AI Prototypes
Development
Creates structured prompts for AI prototyping tools (v0.dev, Lovable, Bolt.new) to convert PRDs or feature specs into working prototypes quickly. Choose the tool based on project needs: UI-only, full-stack, or quick demo. Helps accelerate design validation and stakeholder demos by generating copy-paste-ready prompts.
React Email - Responsive Email Templates
Development
Build responsive, cross-client email templates with React Email components. Use for transactional emails that render correctly in Gmail, Outlook, Apple Mail, and mobile clients. The library compiles React components to inline-styled, table-based HTML compatible with major email clients.
Performance Engineer
Development
Performance optimization specialist for applications. Identify bottlenecks and implement efficiency improvements across all layers.
Global Deployment on Fly.io
DevOps
Assists with deploying applications globally on Fly.io edge infrastructure. Use when deploying Docker-based apps, configuring multi-region machines, setting up persistent storage, or managing global databases.