remotion: Skill for Claude Code

.agents/skills/react-scan/SKILL.md

react-scan is a skill for Claude Code, Codex from remotion-dev/remotion. It costs 49 tokens per session (639 once invoked), scanned A, original, no licence file.

A coding skill for recording and analyzing React render profiles in Remotion Studio. React is a JavaScript library for building user interfaces, and a render profile shows how components update over time.

In plain words
What is it for?
Use it to investigate unnecessary re-renders, slow commits, frame-reactive component trees, or performance changes before and after a code edit.
Why use it?
It helps identify unnecessary screen updates and slow rendering when diagnosing performance problems.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

This is remotion-dev/remotion's own configuration. It tells Claude Code and Codex how to work on remotion itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything remotion configures →

Reuse

Borrowing it

Nothing to install: this file belongs to remotion-dev/remotion. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/remotion-dev/remotion/main/.agents/skills/react-scan/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/remotion-dev/remotion

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for react-scan

README.md
[![agentmods](https://agentmods.dev/badge/skills/remotion-dev/remotion/react-scan/github.svg)](https://agentmods.dev/skills/remotion-dev/remotion/react-scan)
Your own site
<a href="https://agentmods.dev/skills/remotion-dev/remotion/react-scan"><img src="https://agentmods.dev/badge/skills/remotion-dev/remotion/react-scan/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.

agentmods 80×15 button for react-scan

Your own site · 80×15
<a href="https://agentmods.dev/skills/remotion-dev/remotion/react-scan"><img src="https://agentmods.dev/badge/skills/remotion-dev/remotion/react-scan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 639 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

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 →

  • high Data Exfiltration · line 25
    Code or instructions that leak agent conversation context to external services, potentially exposing sensitive user interactions.
    Fix: Remove any code that sends prompts, responses, or session data externally. Preserve user privacy; never exfiltrate conversation content.
How audits are shown
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00049 $0.00639
Opus 5.5 $0.00020 $0.00256
Sonnet 5.5 $0.00010 $0.00128
Haiku 4.5 $0.00005 $0.00064

Measured 1mo ago against content hash 948c65b77f35, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

react-scan 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 1mo 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.

.agents/skills/react-scan/SKILL.md · 76 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Changes

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.

  1. 1mo ago Changed 948c65b77f35
  2. 1mo ago Changed · +6 lines 452c35a93abe
  3. 1mo ago First seen · 70 lines · 49 tokens per session scan A 219ed2f518c2

Subscribe to this mod's changes

react-scan is a skill published in the GitHub repository remotion-dev/remotion (67,130 stars, last pushed yesterday), with no licence file. It adds 49 tokens to every session and 639 once invoked, about $0.0002 per session on Opus 5.5. 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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