demo-animation

demo-animation is a skill for Codex from jqaisystems/jqai-ai-skills. It costs 71 tokens per session (448 once invoked), scanned A, original, MIT.

A generator for a self-playing HTML product demo, meaning a web page that walks through a product without requiring a live presenter. This version is designed mainly for desktop screens.

In plain words
What is it for?
Use it to create a single demo/index.html with an introduction, dashboard mockup, animated cursor and highlights, timeline controls, optional piano music, replay and an ending screen.
Why use it?
It provides a repeatable way to show a product when a live walkthrough is not practical. It turns selected product features into an animated presentation with captions and controls.

Skill for Codex

Written for Codex: agents/openai.yaml present.

Good fit Use it to create a single demo/index.html with an introduction, dashboard mockup, animated cursor and highlights, timeline controls, optional piano music, replay and an ending screen.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jqaisystems/jqai-ai-skills/demo-animation
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 jqaisystems/jqai-ai-skills --skill demo-animation
Clone the repo
git clone --depth 1 https://github.com/jqaisystems/jqai-ai-skills

Made for: 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 demo-animation

README.md
[![agentmods](https://agentmods.dev/badge/skills/jqaisystems/jqai-ai-skills/demo-animation/github.svg)](https://agentmods.dev/skills/jqaisystems/jqai-ai-skills/demo-animation)
Your own site
<a href="https://agentmods.dev/skills/jqaisystems/jqai-ai-skills/demo-animation"><img src="https://agentmods.dev/badge/skills/jqaisystems/jqai-ai-skills/demo-animation/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 demo-animation

Your own site · 80×15
<a href="https://agentmods.dev/skills/jqaisystems/jqai-ai-skills/demo-animation"><img src="https://agentmods.dev/badge/skills/jqaisystems/jqai-ai-skills/demo-animation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 448 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00071 $0.00448
Opus 5 $0.00036 $0.00224
Sonnet 5 $0.00014 $0.00090
Haiku 4.5 $0.00007 $0.00045

Measured 12d ago against content hash cb6c939d99e6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

demo-animation 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 12d 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.

skills/demo-animation/SKILL.md · 41 lines

What it actually says

Demo Animation

Generate a simple self-playing HTML product demo. Output: demo/index.html.

For most new demo requests, prefer demo-animation-v2. Use this skill when the user asks for the legacy desktop-oriented demo style or when a smaller, simpler demo is enough.

Workflow

  1. Read the project README, app entry points, and relevant UI files.
  2. Identify the product name, tagline, visual style, font stack, and 6-10 features to showcase.
  3. Draft a brief demo step list. If the project is unclear, ask one concise question; otherwise proceed.
  4. Generate a single self-contained demo/index.html file with no external dependencies except Google Fonts.
  5. Include intro, dashboard mockup, animated cursor/highlights, sidebar captions, timeline controls, optional piano music, ending screen, and replay.
  6. Validate that all referenced IDs exist, controls work, and the file opens directly in a browser.

Legacy Reference

If you need the original desktop architecture, read references/legacy-demo-engine.md. It contains the older detailed CSS, layout, animation, music, and quality checklist guidance.

Rules

  • Keep the generated UI realistic for the actual product.
  • Keep wait times reasonable: 800-1500ms for reading, 300-600ms for animations.
  • Do not add network dependencies beyond Google Fonts.
  • Do not use this legacy skill when the user explicitly requests mobile-first, touch, fullscreen, or highly responsive behavior; use demo-animation-v2 instead.

Output

Write to demo/index.html. Tell the user:

Demo created at `demo/index.html`. Open it in a browser to preview. Click "Watch Demo" to start the animation.
Files

What ships with it

2 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.

  1. 12d ago First seen · 41 lines · 71 tokens per session scan A cb6c939d99e6

Subscribe to this mod's changes

demo-animation is a skill published in the GitHub repository jqaisystems/jqai-ai-skills (3 stars, last pushed 1mo ago), licensed MIT. It adds 71 tokens to every session and 448 once invoked, about $0.0004 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 2026-08-31.

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