Development

Code quality standards, linting rules, and best practices for clean Solidity code. Use when reviewing code quality or establishing project standards.

Master C++ for systems programming, game development, and performance-critical applications.

Soracom’s release workflow covering Nebula-based versioning, dev→main promotion, deployment validation, and announcement steps. Use when preparing backend releases, promoting builds, or coordinating release notes.

Big tech ML engineer to indie founder transition coach. Expert in idea validation, MVP development, marketing, monetization, and sustainable growth for ADHD entrepreneurs. Activate on 'entrepreneur', 'indie founder', 'startup', 'MVP', 'monetization', 'big tech to indie', 'ADHD business', 'app launch', 'side project'. NOT for neurotypical entrepreneurship, VC-backed startups, or traditional business consulting without ADHD context.

Google Apps Script開発スキル。GAS作成、スプレッドシート自動化、Google API連携時に使用。

Expert guidance for researching, documenting, and integrating Model Context Protocol (MCP) servers and tools. Covers MCP architecture, server/client implementation patterns, tool discovery, integration workflows, security best practices, and multi-language SDK usage (Python, TypeScript, C#, Java, Rust). Enables seamless integration of MCP tools into Claude Code and AI applications.

Data validation and settings management using Python type annotations with Pydantic v2

Performs strict code review with comprehensive validation

Apply 37signals/DHH Rails conventions when writing Ruby on Rails code. Use when building Rails applications, reviewing Rails code, or making architectural decisions. Covers various aspects of Rails application architecture, design and dependencies.

Interactive slash command creator for Claude Code. Triggers when user mentions creating commands, slash commands, command templates, command arguments, or wants to build a new command workflow.

Expert CSS and frontend styling specialist that analyzes codebases, maintains style guides, suggests improvements, and stays current with modern design patterns. Use when working on frontend styling, creating design systems, ensuring visual consistency, or need expert CSS/styling guidance. Integrates with oracle, summoner, and wizard.

This skill should be used when the user says "let's land the plane", "land the plane", "end the session cleanly", "wrap up the session", or asks to prepare for a clean handoff between coding sessions. Provides a systematic protocol for ensuring all work is committed, tested, tracked, and ready for the next session.

Builds and manages iOS/macOS apps using xcodebuild and xcrun simctl CLI tools. Use when working with Xcode projects, running apps in simulators, managing simulator instances, taking screenshots, capturing logs, running tests, or automating builds.

Advanced prompt engineering techniques for optimal AI responses. Use this when crafting prompts, optimizing AI interactions, or designing system prompts for applications.

Modern JavaScript and TypeScript development patterns

Git から指定範囲のコミットを収集し、Quarto（reveal.js）でスライド（HTML/PDF）を生成する。 タスクID、コミット範囲、ブランチ間の差分など、柔軟な指定方法に対応。

Guide for creating Claude Code hooks - user-defined shell commands that execute at lifecycle points. Use when the user wants to create, add, or configure a hook for Claude Code, including PreToolUse, PostToolUse, Notification, UserPromptSubmit, Stop, SubagentStop, PreCompact, SessionStart, or SessionEnd hooks.

Analyze and reduce cognitive load in code by identifying complex conditionals, deep nesting, shallow modules, excessive abstractions, and architectural over-engineering. Use when reviewing code quality, refactoring for maintainability, or simplifying systems. Keywords: cognitive load, complexity, refactor, simplify, maintainability, readability, mental overhead, abstraction, architecture review

This skill provides prescriptive guidance for writing modern CSS layouts using intrinsic design principles, container queries, and fluid responsive techniques. When implementing CSS layouts, always consult this document first.

Senior Frontend Code Reviewer with 12+ years JavaScript/TypeScript experience. Use when reviewing React/TypeScript code, checking code quality and style, verifying accessibility compliance, ensuring test coverage, or configuring linting tools (ESLint, Prettier).