Content & Media

This skill should be used when users want to create animated CLI demos, terminal recordings, or command-line demonstration GIFs. It supports both manual tape file creation and automated demo generation from command descriptions. Use when users mention creating demos, recording terminal sessions, or generating animated GIFs of CLI workflows.

This skill should be used when comparing two videos to analyze compression results or quality differences. Generates interactive HTML reports with quality metrics (PSNR, SSIM) and frame-by-frame visual comparisons. Triggers when users mention "compare videos", "video quality", "compression analysis", "before/after compression", or request quality assessment of compressed videos.

Download YouTube videos and HLS streams (m3u8) from platforms like Mux, Vimeo, etc. using yt-dlp and ffmpeg. Use this skill when users request downloading videos, extracting audio, handling protected streams with authentication headers, or troubleshooting download issues like nsig extraction failures, 403 errors, or cookie extraction problems.

Develops iOS applications with XcodeGen, SwiftUI, and SPM. Triggers on XcodeGen project.yml configuration, SPM dependency issues, device deployment problems, code signing errors, camera/AVFoundation debugging, iOS version compatibility, or "Library not loaded @rpath" framework errors. Use when building iOS apps, fixing Xcode build failures, or deploying to real devices.

Designs integration and E2E tests with mock boundaries and behavior verification rules. Use when writing E2E or integration tests.

Run unit tests and instrumentation tests for Canvas Android apps. Use when user mentions testing, running tests, JUnit, Espresso, or checking test results. Includes commands for Student, Teacher, and Parent apps.

Defines environment variables, architecture design, and build/test commands. Use when configuring environment or designing architecture.

Build Canvas Android apps (Student, Teacher, Parent) using Gradle. Use when user mentions building, compiling, assembling, or making the app. Provides commands for dev, qa, and prod build variants.

Applies React/TypeScript type safety, component design, and state management rules. Use when implementing React components.

Guides PRD, ADR, Design Doc, and Work Plan creation with templates and decision matrix.

サブエージェントのタスク分担と連携を調整。規模判定と自律実行モードを制御。大規模タスク分割時に使用。

Create pull requests for Canvas Android following project conventions. Use when user mentions creating PR, pull request, opening PR, or submitting changes for review. Includes PR template requirements and affects field guidelines.

Designs tests with React Testing Library and MSW. Applies component testing patterns.

Install and deploy Canvas Android apps to connected devices or emulators using adb and Gradle. Use when user mentions installing, deploying, running on device, launching app, or working with emulators.

Defines frontend environment variables, component design, and data flow patterns. Use when configuring React environment.

Coordinates subagent task distribution and collaboration. Controls scale determination and autonomous execution mode.

PRD、ADR、Design Doc、作業計画書の作成を支援。テンプレートと作成判定マトリクスを提供。

Applies Vitest test design and quality standards. Provides coverage requirements and mock usage guides. Use when writing unit tests.

Use when implementing speech-to-text, live transcription, or audio transcription. Covers SpeechAnalyzer (iOS 26+), SpeechTranscriber, volatile/finalized results, AssetInventory model management, audio format handling.

Reference — AVFoundation audio APIs, AVAudioSession categories/modes, AVAudioEngine pipelines, bit-perfect DAC output, iOS 26+ spatial audio capture, ASAF/APAC, Audio Mix with Cinematic framework