Content & Media

Guides Rust backend test development with testcontainers, mockall, and axum-test. Use when writing integration tests, mocking dependencies, testing HTTP handlers, or setting up test infrastructure for Axum/SQLx projects.

Ability to analyse, design, optimise, and improve systems that integrate people, processes, technology, and resources to meet defined performance, quality, cost, and safety requirements. Includes applying engineering, statistical, and systems methods to model workflows, identify inefficiencies, evaluate trade-offs, and implement improvements across operations and supply chains. Applies across manufacturing, services, logistics, healthcare, and infrastructure contexts and is independent of specific tools or industries, with human accountability retained for decisions, outcomes, and impacts.

Build production-ready Flutter apps for Android/iOS using feature-first architecture. Covers project setup, UI patterns, state management (Riverpod/BLoC), navigation (go_router), testing (TDD with mocktail), and deployment. Use when creating Flutter projects, implementing features, debugging Flutter issues, or making architectural decisions.

Generates Soracom documentation (JP user guide for website-users Hugo site + EN developer guide for website-developers Grav site). Use when creating user guides, API reference, FAQ content, or any customer-facing documentation.

Manage user signup/signin and collect software/hardware background to enable personalized content in the Physical AI & Humanoid Robotics textbook.

Conversation style guidelines. Use when responding to the user.

This skill should be used when the user asks to "create a decorator", "write a decorator", "move logic into decorator", "clean logic out of the view", "isn't it decorator logic", "test a decorator", or mentions Draper, keeping views clean, or representation logic in decorators. Should also be used when editing *_decorator.rb files, working in app/decorators/ directory, questioning where formatting methods belong (models vs decorators vs views), or discussing methods like full_name, formatted_*, display_* that don't belong in models. Provides guidance on Draper gem best practices for Rails applications.

Expert MCP builder creating comprehensive blueprints and designs for personal productivity MCP servers with complete specifications, architecture patterns, and implementation guides

Evidence-based UI design system from Practical UI by Adham Dannaway (283 pages, 14 chapters). Use when designing interfaces, reviewing UI, creating mockups, building components, or applying design principles. Covers visual hierarchy, spacing systems, color palettes, typography scales, form design, button patterns, accessibility (WCAG 2.1 AA), copywriting, and reducing cognitive load. Triggers on UI design, interface design, component design, design system, accessibility, WCAG, visual hierarchy, spacing, typography, color palette, forms, buttons, layout, grid, or copywriting questions.

Creative director for educational video content. Generates scene-by-scene narrative direction specifying character actions, emotions, visual metaphors, and storytelling flow without technical implementation details.

Use PROACTIVELY when creating new React projects requiring modern tooling and best practices. Provides three modes - sandbox (Vite + React for quick experiments), enterprise (Next.js with testing and CI/CD), and mobile (Expo + React Native). Enforces TypeScript strict mode, Testing Trophy approach, and 80% coverage. Not for non-React projects or modifying existing applications.

This skill should be used when creating extensions for Claude Code or OpenCode, including plugins, commands, agents, skills, and custom tools. Covers both platforms with format specifications, best practices, and the ai-eng-system build system.

Structured workflow for co-authoring documentation, specs, proposals, and decision docs. Use when user wants to write docs, create specs, draft proposals, or similar structured content.

Generate scripts for educational videos, presentations, interactive activities, and multimedia content supporting learning objectives. Use when creating video scripts, presentation outlines, or interactive elements. Activates on "write video script", "create presentation", "design interactive activity", or "multimedia content".

Use when creating or updating a plan — produces an executable, ambiguity‑free plan with clear tasks.

Use this skill when users need to create complex stateful D&R rules that correlate multiple events over time, track parent-child relationships, or count event occurrences within timeframes.

Expert on iOS development with Swift, UIKit, SwiftUI, Xcode, app architecture, platform features, and Apple ecosystem integration. Invoke when user mentions iOS, iPhone, iPad, Swift, SwiftUI, UIKit, Xcode, Apple development, or iOS-specific features.

Pattern for verifying your output matches required schema before completing. Use before writing final output to ensure validity.

Load methodology context for creating or fixing Claude Code instruction artifacts (discovery: implementation-clarity). Evaluate at implementation-clarity when artifact type is known (command, skill, hook, protocol, external tool config) and implementation approach needs methodology guidance.

Create D3 questions focused on written explanations and reflections of static content (text, images, diagrams). For video-based questions, use implement-video-question instead.