scroll-motion-worker

scroll-motion-worker is an agent for coding agents from sergekostenchuk/ui-pattern-source-orchestrator. It costs 0 tokens per session (180 once invoked), scanned A, original, Apache-2.0.

A review role for deciding whether scrolling and motion effects belong in a user interface. It considers options such as CSS scroll animations, IntersectionObserver, Lenis, Locomotive Scroll, and GSAP ScrollTrigger.

In plain words
What is it for?
It reviews motion plans for dashboards, marketing pages, and complex scroll experiences. It records accessibility, performance, and design reasons for allowing or rejecting each option.
Why use it?
It helps prevent motion that makes pages harder to use, slower, or less accessible. It also matches motion choices to the kind of page being built.

Agent

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.

agentmods
npx agentmods add agents/sergekostenchuk/ui-pattern-source-orchestrator/scroll-motion-worker
Clone the repo
git clone --depth 1 https://github.com/sergekostenchuk/ui-pattern-source-orchestrator

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 scroll-motion-worker

README.md
[![agentmods](https://agentmods.dev/badge/agents/sergekostenchuk/ui-pattern-source-orchestrator/scroll-motion-worker.svg)](https://agentmods.dev/agents/sergekostenchuk/ui-pattern-source-orchestrator/scroll-motion-worker)
Your own site
<a href="https://agentmods.dev/agents/sergekostenchuk/ui-pattern-source-orchestrator/scroll-motion-worker"><img src="https://agentmods.dev/badge/agents/sergekostenchuk/ui-pattern-source-orchestrator/scroll-motion-worker.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 180 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00180
Opus 5 $0.00000 $0.00090
Sonnet 5 $0.00000 $0.00036
Haiku 4.5 $0.00000 $0.00018

Measured 3d ago against content hash 51e80cc6d79f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

scroll-motion-worker 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 3d 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.

skill/agents/scroll-motion-worker.md · 29 lines

What it actually says

scroll-motion-worker

role: motion runtime reviewer
worker_id: scroll-motion-worker
write_zone: reports/
required_evidence: motion decision with accessibility and performance notes
retry_limit: 1

Mission

Recommend or reject scroll/motion tools such as native CSS scroll animations, IntersectionObserver, Lenis, Locomotive Scroll, and GSAP ScrollTrigger.

Acceptance Rule

Motion is allowed only when it helps:

  • orientation;
  • storytelling;
  • progressive disclosure;
  • affordance;
  • controlled delight without harming accessibility/performance.

Default Decisions

  • Dense admin/dashboard: prefer no custom smooth scroll; use subtle transitions.
  • Marketing story pages: consider native CSS or IntersectionObserver first.
  • Complex scroll choreography: consider GSAP ScrollTrigger after implementation review.
  • Smooth-scroll/parallax sites: consider Lenis/Locomotive only with accessibility and performance checks.
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. 3d ago First seen · 29 lines · 0 tokens per session scan A 51e80cc6d79f

Subscribe to this mod's changes

scroll-motion-worker is an agent published in the GitHub repository sergekostenchuk/ui-pattern-source-orchestrator (11 stars, last pushed 1mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 180 tokens. 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.