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Asymmetric-al/core

Best practices for Remotion - Video creation in React

What is core?

core is a Claude Code agent skill that best practices for Remotion - Video creation in React.

Works with~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/Asymmetric-al/core/tree/HEAD/.agents/skills/remotion-best-practices

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Documentation

When to use

Use this skills whenever you are dealing with Remotion code to obtain the domain-specific knowledge.

Captions

When dealing with captions or subtitles, load the ./rules/subtitles.md file for more information.

Using FFmpeg

For some video operations, such as trimming videos or detecting silence, FFmpeg should be used. Load the ./rules/ffmpeg.md file for more information.

Audio visualization

When needing to visualize audio (spectrum bars, waveforms, bass-reactive effects), load the ./rules/audio-visualization.md file for more information.

How to use

Read individual rule files for detailed explanations and code examples:

Individual skills in this repo

This repo contains 7 individual skills — each has its own dedicated page.

Asymmetric-al/core

Build animations for Expo and React Native only, using Reanimated, Gesture Handler, Expo Router, and expo-haptics. Use when the target runtime is an Expo or React Native app. Do not use it for Core Next.js web motion; use `animate` for web. Only runs when explicitly invoked; it does not trigger on its own.

Asymmetric-al/core

Build an animation from scratch, making the decisions in the order that determines whether it feels right — should it animate at all, what purpose, which tool, which properties, which curve and duration, how it interrupts, how it exits. Writes the implementation. Use when asked to animate something, add motion, make a component feel alive, or build a transition. For critiquing existing motion use review-animations; for auditing a whole codebase use improve-animations. Only runs when explicitly invoked; it does not trigger on its own.

Asymmetric-al/core

Reverse-lookup glossary that turns a vague description of a web animation or motion effect into its exact term ("the bouncy thing when a popover opens" → Pop in; "the iOS rubber-band scroll" → Rubber-banding). Use when the user asks "what's it called when…", or describes a motion effect without knowing its name and wants the right word to prompt an AI or designer with. For naming an effect, not designing or building one.

Asymmetric-al/core

Inspect a Core UI or code surface for a small number of justified motion opportunities and explicitly identify what should remain static. Use when asked what should animate, where motion would improve feedback or comprehension, how to make an interface feel more alive without over-animating it, or whether a proposed animation is worth adding. Read-only; do not use to review or fix existing motion code or to implement animations.

Asymmetric-al/core

Survey a codebase's animation and motion code as a senior motion advisor, then produce a prioritized audit and self-contained implementation plans for other agents (or cheaper models) to execute. Read-only on source code — it plans improvements, it does not apply them. Use when the user asks to "improve the animations", "audit the motion", "make this app feel better", or wants a roadmap of animation fixes rather than a review of a single diff.

Asymmetric-al/core

Implement smooth, accessible animations with motion/react (Framer Motion) in React. Use when adding animations, gestures, or layout transitions with motion, AnimatePresence, useScroll, and related APIs. Requires a 'use client' boundary; not for strictly server-rendered components or when no animation is needed.

Asymmetric-al/core

Reviews animation and motion code against a high craft bar derived from Emil Kowalski's design engineering philosophy. Default to flagging; approval is earned.

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