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43 changes: 43 additions & 0 deletions .agents/skills/remotion-best-practices/SKILL.md
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---
name: remotion-best-practices
description: Best practices for Remotion - Video creation in React
metadata:
tags: remotion, video, react, animation, composition
---

## When to use

Use this skills whenever you are dealing with Remotion code to obtain the domain-specific knowledge.
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⚠️ Potential issue | 🟡 Minor

Fix the singular/plural typo in the usage guidance.

Use this skills reads awkwardly in the entry-point doc.

✏️ Suggested wording
-Use this skills whenever you are dealing with Remotion code to obtain the domain-specific knowledge.
+Use this skill whenever you are dealing with Remotion code to get domain-specific guidance.
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
Use this skills whenever you are dealing with Remotion code to obtain the domain-specific knowledge.
Use this skill whenever you are dealing with Remotion code to get domain-specific guidance.
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.

In @.agents/skills/remotion-best-practices/SKILL.md at line 10, Replace the
awkward phrase "Use this skills" in SKILL.md with correct grammar; change the
usage guidance line that currently reads "Use this skills whenever you are
dealing with Remotion code to obtain the domain-specific knowledge." to either
"Use this skill whenever you are dealing with Remotion code to obtain the
domain-specific knowledge." (singular) or "Use these skills whenever you are
dealing with Remotion code to obtain the domain-specific knowledge." (plural) to
match the intended meaning.


## How to use

Read individual rule files for detailed explanations and code examples:

- [rules/3d.md](rules/3d.md) - 3D content in Remotion using Three.js and React Three Fiber
- [rules/animations.md](rules/animations.md) - Fundamental animation skills for Remotion
- [rules/assets.md](rules/assets.md) - Importing images, videos, audio, and fonts into Remotion
- [rules/audio.md](rules/audio.md) - Using audio and sound in Remotion - importing, trimming, volume, speed, pitch
- [rules/calculate-metadata.md](rules/calculate-metadata.md) - Dynamically set composition duration, dimensions, and props
- [rules/can-decode.md](rules/can-decode.md) - Check if a video can be decoded by the browser using Mediabunny
- [rules/charts.md](rules/charts.md) - Chart and data visualization patterns for Remotion
- [rules/compositions.md](rules/compositions.md) - Defining compositions, stills, folders, default props and dynamic metadata
- [rules/display-captions.md](rules/display-captions.md) - Displaying captions in Remotion with TikTok-style pages and word highlighting
- [rules/extract-frames.md](rules/extract-frames.md) - Extract frames from videos at specific timestamps using Mediabunny
- [rules/fonts.md](rules/fonts.md) - Loading Google Fonts and local fonts in Remotion
- [rules/get-audio-duration.md](rules/get-audio-duration.md) - Getting the duration of an audio file in seconds with Mediabunny
- [rules/get-video-dimensions.md](rules/get-video-dimensions.md) - Getting the width and height of a video file with Mediabunny
- [rules/get-video-duration.md](rules/get-video-duration.md) - Getting the duration of a video file in seconds with Mediabunny
- [rules/gifs.md](rules/gifs.md) - Displaying GIFs synchronized with Remotion's timeline
- [rules/images.md](rules/images.md) - Embedding images in Remotion using the Img component
- [rules/import-srt-captions.md](rules/import-srt-captions.md) - Importing .srt subtitle files into Remotion using @remotion/captions
- [rules/lottie.md](rules/lottie.md) - Embedding Lottie animations in Remotion
- [rules/measuring-dom-nodes.md](rules/measuring-dom-nodes.md) - Measuring DOM element dimensions in Remotion
- [rules/measuring-text.md](rules/measuring-text.md) - Measuring text dimensions, fitting text to containers, and checking overflow
- [rules/sequencing.md](rules/sequencing.md) - Sequencing patterns for Remotion - delay, trim, limit duration of items
- [rules/tailwind.md](rules/tailwind.md) - Using TailwindCSS in Remotion
- [rules/text-animations.md](rules/text-animations.md) - Typography and text animation patterns for Remotion
- [rules/timing.md](rules/timing.md) - Interpolation curves in Remotion - linear, easing, spring animations
- [rules/transcribe-captions.md](rules/transcribe-captions.md) - Transcribing audio to generate captions in Remotion
- [rules/transitions.md](rules/transitions.md) - Scene transition patterns for Remotion
- [rules/trimming.md](rules/trimming.md) - Trimming patterns for Remotion - cut the beginning or end of animations
- [rules/videos.md](rules/videos.md) - Embedding videos in Remotion - trimming, volume, speed, looping, pitch
11 changes: 11 additions & 0 deletions .agents/skills/remotion-best-practices/_meta.json
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{
"owner": "am-will",
"slug": "remotion-best-practices",
"displayName": "Remotion Best Practices",
"latest": {
"version": "1.0.0",
"publishedAt": 1769024303669,
"commit": "https://github.com/clawdbot/skills/commit/cf14c4a145107299b14a4eba382d442800fd4666"
},
"history": []
}
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⚠️ Potential issue | 🟡 Minor

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
# Search for any code that reads _meta.json from skill directories
rg -n "_meta\.json" --type ts --type js

Repository: truffle-ai/dexto

Length of output: 42


🏁 Script executed:

# Find and inspect the discover-skills file
fd -t f "discover-skills" --type ts

Repository: truffle-ai/dexto

Length of output: 229


🏁 Script executed:

# Check what files are in the skill directories to understand the pattern
find .agents/skills -type f -name "*.md" -o -name "*.json" | head -20

Repository: truffle-ai/dexto

Length of output: 1184


🏁 Script executed:

# Search broadly for any code that loads or validates skill metadata
rg -i "skill.*meta|meta.*skill" --type ts --type js -A 2 -B 2

Repository: truffle-ai/dexto

Length of output: 42


🏁 Script executed:

# Check if _meta.json follows any naming convention or is referenced in any config files
rg "_meta" --type json --type md --type yaml --type yml -A 1 -B 1

Repository: truffle-ai/dexto

Length of output: 87


🏁 Script executed:

# Find discover-skills file
fd -type f discover-skills

Repository: truffle-ai/dexto

Length of output: 230


🏁 Script executed:

# Search for "SKILL.md" to understand skill discovery patterns
rg "SKILL\.md" -A 3 -B 3

Repository: truffle-ai/dexto

Length of output: 35363


🏁 Script executed:

# Look for any skill loading or discovery logic
rg -i "skills.*load|discover.*skill|skill.*discover" -A 2 -B 2

Repository: truffle-ai/dexto

Length of output: 18699


🏁 Script executed:

# Check if there are any configuration files that define how skills are loaded
fd -type f -name "*.config.*" -o -name "*config.ts" -o -name "*config.js"

Repository: truffle-ai/dexto

Length of output: 230


Remove unused _meta.json metadata file.

This file is not consumed by the skill discovery system, which only recognizes skill directories containing SKILL.md. No code in the codebase reads or validates this metadata. Other skills in the repository (automations, create-skill) don't include similar metadata files.

🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.

In @.agents/skills/remotion-best-practices/_meta.json around lines 1 - 11,
Delete the unused metadata file named _meta.json (the JSON object containing
owner, slug, displayName, latest, history) from the remotion-best-practices
skill directory since the skill discovery only uses SKILL.md and no code reads
this metadata; remove the file and any imports or references to _meta.json if
present (search for "_meta.json" or "remotion-best-practices" references) to
ensure there are no dangling references.

86 changes: 86 additions & 0 deletions .agents/skills/remotion-best-practices/rules/3d.md
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---
name: 3d
description: 3D content in Remotion using Three.js and React Three Fiber.
metadata:
tags: 3d, three, threejs
---

# Using Three.js and React Three Fiber in Remotion

Follow React Three Fiber and Three.js best practices.
Only the following Remotion-specific rules need to be followed:

## Prerequisites

First, the `@remotion/three` package needs to be installed.
If it is not, use the following command:

```bash
npx remotion add @remotion/three # If project uses npm
bunx remotion add @remotion/three # If project uses bun
yarn remotion add @remotion/three # If project uses yarn
pnpm exec remotion add @remotion/three # If project uses pnpm
```

## Using ThreeCanvas

You MUST wrap 3D content in `<ThreeCanvas>` and include proper lighting.
`<ThreeCanvas>` MUST have a `width` and `height` prop.

```tsx
import { ThreeCanvas } from "@remotion/three";
import { useVideoConfig } from "remotion";

const { width, height } = useVideoConfig();

<ThreeCanvas width={width} height={height}>
<ambientLight intensity={0.4} />
<directionalLight position={[5, 5, 5]} intensity={0.8} />
<mesh>
<sphereGeometry args={[1, 32, 32]} />
<meshStandardMaterial color="red" />
</mesh>
</ThreeCanvas>
```

## No animations not driven by `useCurrentFrame()`

Shaders, models etc MUST NOT animate by themselves.
No animations are allowed unless they are driven by `useCurrentFrame()`.
Otherwise, it will cause flickering during rendering.

Using `useFrame()` from `@react-three/fiber` is forbidden.

## Animate using `useCurrentFrame()`

Use `useCurrentFrame()` to perform animations.

```tsx
const frame = useCurrentFrame();
const rotationY = frame * 0.02;

<mesh rotation={[0, rotationY, 0]}>
<boxGeometry args={[2, 2, 2]} />
<meshStandardMaterial color="#4a9eff" />
</mesh>
```

## Using `<Sequence>` inside `<ThreeCanvas>`

The `layout` prop of any `<Sequence>` inside a `<ThreeCanvas>` must be set to `none`.

```tsx
import { Sequence } from "remotion";
import { ThreeCanvas } from "@remotion/three";

const { width, height } = useVideoConfig();

<ThreeCanvas width={width} height={height}>
<Sequence layout="none">
<mesh>
<boxGeometry args={[2, 2, 2]} />
<meshStandardMaterial color="#4a9eff" />
</mesh>
</Sequence>
</ThreeCanvas>
```
29 changes: 29 additions & 0 deletions .agents/skills/remotion-best-practices/rules/animations.md
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---
name: animations
description: Fundamental animation skills for Remotion
metadata:
tags: animations, transitions, frames, useCurrentFrame
---

All animations MUST be driven by the `useCurrentFrame()` hook.
Write animations in seconds and multiply them by the `fps` value from `useVideoConfig()`.

```tsx
import { useCurrentFrame } from "remotion";

export const FadeIn = () => {
const frame = useCurrentFrame();
const { fps } = useVideoConfig();

const opacity = interpolate(frame, [0, 2 * fps], [0, 1], {
extrapolateRight: 'clamp',
});

return (
<div style={{ opacity }}>Hello World!</div>
);
};
```
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⚠️ Potential issue | 🔴 Critical

Missing imports in the code example.

The example uses useVideoConfig and interpolate without importing them, which will cause runtime errors.

🔧 Proposed fix to add missing imports
-import { useCurrentFrame } from "remotion";
+import { useCurrentFrame, useVideoConfig, interpolate } from "remotion";
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.

In @.agents/skills/remotion-best-practices/rules/animations.md around lines 11 -
26, The example FadeIn component imports useCurrentFrame but omits
useVideoConfig and interpolate, causing runtime errors; update the import
statement for the component (the top of the snippet using useCurrentFrame and
FadeIn) to also import useVideoConfig and interpolate from "remotion" so all
referenced symbols (useCurrentFrame, useVideoConfig, interpolate, FadeIn) are
declared.


CSS transitions or animations are FORBIDDEN - they will not render correctly.
Tailwind animation class names are FORBIDDEN - they will not render correctly.
78 changes: 78 additions & 0 deletions .agents/skills/remotion-best-practices/rules/assets.md
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---
name: assets
description: Importing images, videos, audio, and fonts into Remotion
metadata:
tags: assets, staticFile, images, fonts, public
---

# Importing assets in Remotion

## The public folder

Place assets in the `public/` folder at your project root.

## Using staticFile()

You MUST use `staticFile()` to reference files from the `public/` folder:

```tsx
import {Img, staticFile} from 'remotion';

export const MyComposition = () => {
return <Img src={staticFile('logo.png')} />;
};
```

The function returns an encoded URL that works correctly when deploying to subdirectories.

## Using with components

**Images:**

```tsx
import {Img, staticFile} from 'remotion';

<Img src={staticFile('photo.png')} />;
```

**Videos:**

```tsx
import {Video} from '@remotion/media';
import {staticFile} from 'remotion';

<Video src={staticFile('clip.mp4')} />;
```

**Audio:**

```tsx
import {Audio} from '@remotion/media';
import {staticFile} from 'remotion';

<Audio src={staticFile('music.mp3')} />;
```

**Fonts:**

```tsx
import {staticFile} from 'remotion';

const fontFamily = new FontFace('MyFont', `url(${staticFile('font.woff2')})`);
await fontFamily.load();
document.fonts.add(fontFamily);
```

## Remote URLs

Remote URLs can be used directly without `staticFile()`:

```tsx
<Img src="https://example.com/image.png" />
<Video src="https://remotion.media/video.mp4" />
```

## Important notes

- Remotion components (`<Img>`, `<Video>`, `<Audio>`) ensure assets are fully loaded before rendering
- Special characters in filenames (`#`, `?`, `&`) are automatically encoded
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