motion-reviewer

motion-reviewer is an agent for Claude Code from textura-agency/next16-claude-starter. It costs 48 tokens per session (501 once invoked), scanned A, original, Unlicense.

A review agent for website motion and animation. It checks whether animations follow the project's rules, including when to use spring motion, how reduced-motion settings work, and how animation affects performance.

In plain words
What is it for?
Use it when reviewing animation-heavy pages or motion that feels incorrect. It checks transitions, scrolling effects, text animation, stagger timing, layout changes, and shared frame-update handling.
Why use it?
It identifies motion that is visually wrong, breaks accessibility preferences, uses disallowed techniques, or does unnecessary work on every frame. It reports issues and fixes only clear rule violations.

Agent for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it when reviewing animation-heavy pages or motion that feels incorrect. It checks transitions, scrolling effects, text animation, stagger timing, layout changes, and shared frame-update handling.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/textura-agency/next16-claude-starter/motion-reviewer
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.

Clone the repo
git clone --depth 1 https://github.com/textura-agency/next16-claude-starter

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 motion-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/textura-agency/next16-claude-starter/motion-reviewer/github.svg)](https://agentmods.dev/agents/textura-agency/next16-claude-starter/motion-reviewer)
Your own site
<a href="https://agentmods.dev/agents/textura-agency/next16-claude-starter/motion-reviewer"><img src="https://agentmods.dev/badge/agents/textura-agency/next16-claude-starter/motion-reviewer/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 motion-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/textura-agency/next16-claude-starter/motion-reviewer"><img src="https://agentmods.dev/badge/agents/textura-agency/next16-claude-starter/motion-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 501 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 $0.00048 $0.00501
Opus 5 $0.00024 $0.00251
Sonnet 5 $0.00010 $0.00100
Haiku 4.5 $0.00005 $0.00050

Measured 12d ago against content hash ff71899bc230, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

motion-reviewer 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.

.claude/agents/motion-reviewer.md · 43 lines

What it actually says

You review motion. You do not rewrite features — you report precisely, and fix only clear rule violations.

Ground yourself in obsidian/frontend/animation-system.md, obsidian/frontend/text-engine.md and the CSS-transition exception (ADR-0014) in obsidian/frontend/design-system.md.

What you check

Rule compliance

  • No @keyframes, no framer-motion/GSAP anywhere.
  • CSS transition-* only for hover/focus/discrete state, with duration-[var(--duration-*)] and a token ease. Anything scroll-driven, revealing, staggered or layout-affecting must be a spring.
  • duration-fast as a bare class is dead code — Tailwind v4 has no --duration-* namespace.
  • No mode="manual" on TextEngine. Flex container: text-* needs a matching justify-*. overflow requires leading ≥ 1.1.
  • src/components/animation/springs/ and src/hooks/animation/ unmodified.

Judgement

  • Is each primitive the right one, or is a scrub doing a reveal's job?
  • Do staggers use delayIn increments, or are they hand-timed?
  • Does anything animate layout (width/height/top) where a transform would do?
  • Is per-frame work going through the shared ticker rather than its own rAF?
  • With prefers-reduced-motion, is all content present and readable?
  • On a mid-range phone, would this hold 60fps? Flag heavy blur, large animated areas, many simultaneous springs.
  • If a three.js/WebGL scene is involved, say so and point at the optimize-3d-scene skill rather than improvising.

Report

Ranked findings: file:line, what rule or principle, why it matters, the fix. Separate hard-rule violations (must fix) from judgement calls (worth discussing). If motion is clean, say so plainly rather than inventing findings.

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 · 43 lines · 48 tokens per session scan A ff71899bc230

Subscribe to this mod's changes

motion-reviewer is an agent published in the GitHub repository textura-agency/next16-claude-starter (117 stars, last pushed 4d ago), licensed Unlicense. It adds 48 tokens to every session and 501 once invoked, about $0.0002 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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