A tool for defining motion effects in .neon JSON files and rendering them as MP4 or WebP videos. It uses browser-based rendering and supports canvas, WebGL, and post-processing effects.

Use it to create animations, visual effects, motion graphics, and rendered video assets.

It provides a defined workflow for turning motion-effect specifications into video files while following the format’s required variable names and guides.

neon — Skill for Claude Code and Codex by S1mpleSonny

Install

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.

Any agent

npx skills add S1mpleSonny/neon-vibe-motion --skill neon

Clone the repo

git clone --depth 1 https://github.com/S1mpleSonny/neon-vibe-motion

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/s1mplesonny/neon-vibe-motion/neon/github.svg)](https://agentmods.dev/skills/s1mplesonny/neon-vibe-motion/neon)

Your own site

<a href="https://agentmods.dev/skills/s1mplesonny/neon-vibe-motion/neon"><img src="https://agentmods.dev/badge/skills/s1mplesonny/neon-vibe-motion/neon/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/s1mplesonny/neon-vibe-motion/neon"><img src="https://agentmods.dev/badge/skills/s1mplesonny/neon-vibe-motion/neon.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,349 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.

Origin original 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.

Model	Per session	Once invoked
Fable 5.1	$0.00050	$0.02349
Opus 5	$0.00025	$0.01175
Sonnet 5	$0.00010	$0.00470
Haiku 4.5	$0.00005	$0.00235

Measured 11d ago against content hash e085dd4abac9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

neon 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 11d ago.

The scan reads SKILL.md. This mod also ships 14 executable files (scripts/bin/commands/render.js, scripts/bin/commands/validate.js, scripts/bin/harness-path.js, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/neon/SKILL.md · 257 lines

How it starts

The opening of the file, as written. The whole thing — 257 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Neon — Motion Effect Production

Generate .neon files (JSON motion definitions) and render them to video using a headless browser renderer.

Prerequisites

{skill_dir} is the directory where this SKILL.md file is located.

cd {skill_dir}/scripts && npm install && npm link

After setup, neon is available globally. Requires Node.js 18+ and Chromium (installed by Playwright or system Chrome).

Mandatory Reading Before Implementation

STOP — Before writing ANY code, you MUST read the relevant guide files.

This is NOT optional. Do NOT rely on general knowledge or common conventions.

If you're implementing...	You MUST first read
Canvas 2D effects	CANVAS-GUIDE.md
WebGL / 3D effects	WEBGL-GUIDE.md
Post-processing (bloom, blur, etc.)	POSTPROCESS-GUIDE.md
Image/video/model parameters	PARAMETERS.md

Why this matters: This framework has specific variable names, conventions, and APIs that differ from common standards. For example:

Post-process uses vUv, uTexture, uResolution — NOT v_texCoord, u_texture, u_resolution
Shaders fail silently with wrong names

Workflow:

Identify which features you need (Canvas? WebGL? Post-process?)
Read the corresponding guide file(s) FIRST
Then write code following the guide's exact conventions

Workflow

Generate → Validate → Render

1. Read relevant guide file(s) based on features needed
2. Generate .neon file (JSON matching MotionDefinition interface)
3. neon validate <file.neon>
4. neon render <file.neon> -o output.mp4

Iteration

Modify the .neon file (adjust parameters, code, or settings), then re-render.

.neon File Format

Neon Lab exports .neon files with a wrapper structure:

{
  "version": "0.1.0",
  "exportedAt": 1770198455346,
  "conversation": {
    "id": "conversation-uuid",
    "title": "效果名称",
    "messages": [
      {
        "id": "msg-1",
        "role": "assistant",
        "content": "效果描述和实现说明",
        "timestamp": 1770198455346
      }
    ],
    "motion": { /* MotionDefinition — the actual renderable data */ },
    "createdAt": 1770193633865,
    "updatedAt": 1770193633865
  }
}

Read the full file on GitHub · 257 lines

Files

What ships with it

24 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.

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.

11d ago First seen · 257 lines · 50 tokens per session scan A e085dd4abac9

Subscribe to this mod's changes

neon is a skill published in the GitHub repository S1mpleSonny/neon-vibe-motion (57 stars, last pushed 6mo ago), licensed BSD-3-Clause. It adds 50 tokens to every session and 2,349 once invoked, about $0.0003 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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