ultracite is a code linter and formatter that applies a fixed set of style and quality rules without requiring project-specific configuration. It is for developers who want automated checks and formatting for their code.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add haydenbleasel/ultracite --skill remotion-best-practicesgit clone --depth 1 https://github.com/haydenbleasel/ultraciteWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/haydenbleasel/ultracite/remotion-best-practices)<a href="https://agentmods.dev/skills/haydenbleasel/ultracite/remotion-best-practices"><img src="https://agentmods.dev/badge/skills/haydenbleasel/ultracite/remotion-best-practices/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/haydenbleasel/ultracite/remotion-best-practices"><img src="https://agentmods.dev/badge/skills/haydenbleasel/ultracite/remotion-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 4 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 17 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium Data Exfiltration · line 188 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium MCP Rug Pull · line 223 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 232 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00017 | $0.02960 |
| Opus 5 | $0.00009 | $0.01480 |
| Sonnet 5 | $0.00003 | $0.00592 |
| Haiku 4.5 | $0.00002 | $0.00296 |
Grade A, and why
remotion-best-practices scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
2 near-identical copies found in the catalogue:
- remotion-best-practices — 95% identical, 23 lines differ
- remotion-best-practices — 95% identical, 23 lines differ
How it starts
The opening of the file, as written. The whole thing — 364 lines — stays where its author put it; the contents beside it link to each section on GitHub.
When to use
Use this skills whenever you are dealing with Remotion code to obtain the domain-specific knowledge.
New project setup
When in an empty folder or workspace with no existing Remotion project, scaffold one using:
npx create-video@latest --yes --blank --no-tailwind my-video
Replace my-video with a suitable project name.
Designing a video
Before designing visual scenes, layouts, promos, motion graphics, or text-heavy videos, load rules/video-layout.md for video-first layout and text sizing guidance.
Animate properties using useCurrentFrame() and interpolate(). Prefer interpolate() over spring() unless physics-based motion is explicitly needed. Use Easing.bezier() to customize timing, including jumpy or overshooting motion.
For animations that should be editable in Remotion Studio, keep the interpolate() call inline in the style prop and use individual CSS transform properties (scale, translate, rotate) instead of composing a transform string.
import { useCurrentFrame, Easing, interpolate, useVideoConfig } from "remotion";
export const FadeIn = () => {
const frame = useCurrentFrame();
const { fps } = useVideoConfig();
const opacity = interpolate(frame, [0, 2 * fps], [0, 1], {
extrapolateRight: "clamp",
extrapolateLeft: "clamp",
easing: Easing.bezier(0.16, 1, 0.3, 1),
});
return <div style={{ opacity }}>Hello World!</div>;
};
Prefer:
style={{
scale: interpolate(frame, [0, 100], [0, 1]),
translate: interpolate(frame, [0, 100], ["0px 0px", "100px 100px"]),
rotate: interpolate(frame, [0, 100], ["20deg", "90deg"]),
}}
Over:
const scale = interpolate(frame, [0, 100], [0, 1]);
style={{
transform: `scale(${scale})`,
}}
CSS transitions or animations are FORBIDDEN - they will not render correctly.
Tailwind animation class names are FORBIDDEN - they will not render correctly.
Place assets in the public/ folder at your project root.
What ships with it
40 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- rules/3d.md 2.2 KB
- rules/assets/charts-bar-chart.tsx 3.8 KB
- rules/assets/text-animations-typewriter.tsx 2.3 KB
- rules/assets/text-animations-word-highlight.tsx 2.6 KB
- rules/audio-visualization.md 4.8 KB
- rules/audio.md 3.5 KB
- rules/calculate-metadata.md 3.2 KB
- rules/compositions.md 3.3 KB
- rules/display-captions.md 5.3 KB
- rules/effects.md 8.0 KB
- rules/ffmpeg.md 1.1 KB
- rules/get-audio-duration.md 1.3 KB
- rules/get-video-dimensions.md 1.6 KB
- rules/get-video-duration.md 1.3 KB
- rules/gifs.md 3.6 KB
- rules/google-fonts.md 1.7 KB
- rules/html-in-canvas.md 3.6 KB
- rules/images.md 1.4 KB
- rules/import-srt-captions.md 2.2 KB
- rules/light-leaks.md 2.3 KB
- rules/local-fonts.md 1.5 KB
- rules/lottie.md 1.8 KB
- rules/maplibre.md 13 KB
- rules/measuring-dom-nodes.md 973 B
- rules/measuring-text.md 2.7 KB
- rules/parameters.md 2.3 KB
- rules/sequencing.md 3.2 KB
- rules/sfx.md 1.8 KB
- rules/silence-detection.md 2.5 KB
- rules/subtitles.md 922 B
- rules/tailwind.md 420 B
- rules/text-animations.md 700 B
- rules/timing.md 5.4 KB
- rules/transcribe-captions.md 1.9 KB
- rules/transitions.md 5.7 KB
- rules/transparent-videos.md 2.2 KB
- rules/trimming.md 1.2 KB
- rules/video-layout.md 4.0 KB
- rules/videos.md 3.4 KB
- rules/voiceover.md 3.2 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 13d ago First seen · 364 lines · 17 tokens per session scan A 615bc7ea5fa3
remotion-best-practices is a skill published in the GitHub repository haydenbleasel/ultracite (3,262 stars, last pushed 3d ago), licensed MIT. It adds 17 tokens to every session and 2,960 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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