vskill: Skill for Claude Code

.claude/skills/animejs/SKILL.md

animejs is a skill for Claude Code from anton-abyzov/vskill. It costs 52 tokens per session (794 once invoked), scanned A, a copy of animejs, MIT.

An Anime.js guide for HyperFrames, a system that renders timed HTML compositions. It explains how to make Anime.js animations follow HyperFrames' controlled clock.

In plain words
What is it for?
It helps create deterministic Anime.js animations and timelines, set their timing and looping, register them with HyperFrames, and convert Anime.js examples for rendering.
Why use it?
It avoids animations advancing on their own or depending on real-time behavior, which can make rendered results inconsistent.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is anton-abyzov/vskill's own configuration. It tells Claude Code how to work on vskill 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 vskill configures →

Reuse

Borrowing it

Nothing to install: this file belongs to anton-abyzov/vskill. 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/anton-abyzov/vskill/main/.claude/skills/animejs/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/anton-abyzov/vskill

Made for: Claude Code.

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 animejs

README.md
[![agentmods](https://agentmods.dev/badge/skills/anton-abyzov/vskill/animejs.svg)](https://agentmods.dev/skills/anton-abyzov/vskill/animejs)
Your own site
<a href="https://agentmods.dev/skills/anton-abyzov/vskill/animejs"><img src="https://agentmods.dev/badge/skills/anton-abyzov/vskill/animejs.svg" alt="Measured on agentmods" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 794 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 98% copy Near-identical to another mod 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 $0.00052 $0.00794
Opus 5 $0.00026 $0.00397
Sonnet 5 $0.00010 $0.00159
Haiku 4.5 $0.00005 $0.00079

Measured 8d ago against content hash 9536d51d2214, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

animejs 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 8d 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.

Origin

This is a copy

98% identical to animejs — 1 line differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/skills/animejs/SKILL.md · 116 lines

How it starts

The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Anime.js for HyperFrames

HyperFrames can seek Anime.js instances through its animejs runtime adapter. The composition owns the animation objects; HyperFrames owns the clock.

Contract

  • Create animations or timelines synchronously during composition initialization.
  • Set autoplay: false so Anime.js does not advance on its own clock.
  • Register every returned animation or timeline on window.__hfAnime.
  • Use finite durations and loop counts.
  • Avoid callbacks that mutate DOM based on wall-clock time, network state, or unseeded randomness.

The adapter seeks every registered instance with instance.seek(timeMs), where timeMs is HyperFrames time in milliseconds.

Basic Pattern

<script src="https://cdn.jsdelivr.net/npm/[email protected]/lib/anime.iife.min.js"></script>
<script>
  const anim = anime({
    targets: ".mark",
    translateX: 280,
    rotate: "1turn",
    opacity: [0, 1],
    duration: 1200,
    easing: "easeOutExpo",
    autoplay: false,
  });

  window.__hfAnime = window.__hfAnime || [];
  window.__hfAnime.push(anim);
</script>

Timeline Pattern

<script>
  const tl = anime.timeline({
    autoplay: false,
    easing: "easeOutCubic",
  });

  tl.add({
    targets: ".title",
    translateY: [40, 0],
    opacity: [0, 1],
    duration: 650,
  }).add(
    {
      targets: ".accent",
      scaleX: [0, 1],
      duration: 450,
    },
    250,
  );

  window.__hfAnime = window.__hfAnime || [];
  window.__hfAnime.push(tl);
</script>

Module Builds

If you use an ES module build, the adapter does not care how the instance was created. It only needs the returned object to expose seek(), pause(), and preferably play():

<script type="module">
  import { animate } from "https://cdn.jsdelivr.net/npm/animejs/+esm";

  const anim = animate(".chip", {
    x: "18rem",
    duration: 900,
    autoplay: false,
  });

  window.__hfAnime = window.__hfAnime || [];
  window.__hfAnime.push(anim);
</script>

Good Uses

Read the full file on GitHub · 116 lines

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. 8d ago First seen · 116 lines · 52 tokens per session scan A 9536d51d2214

Subscribe to this mod's changes

animejs is a skill published in the GitHub repository anton-abyzov/vskill (45 stars, last pushed yesterday), licensed MIT. It adds 52 tokens to every session and 794 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 98% identical to animejs, differing in 1 line, and is treated as a copy.

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