What is motion-reviewer?

A motion review agent checks animations against a project's design rules, including spring-based movement, allowed CSS transitions, reduced-motion behaviour, and per-frame cost.

Use it when reviewing animation-heavy interfaces or investigating motion that feels wrong; it reports issues and fixes only clear rule violations.

It catches motion that uses the wrong technique, ignores accessibility preferences, clips or moves text poorly, or changes protected files.

How textura-agency/ai-design-vault configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to textura-agency/ai-design-vault. 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/textura-agency/ai-design-vault/main/.claude/agents/motion-reviewer.md

Clone the repo

git clone --depth 1 https://github.com/textura-agency/ai-design-vault

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/textura-agency/ai-design-vault/motion-reviewer/github.svg)](https://agentmods.dev/agents/textura-agency/ai-design-vault/motion-reviewer)

Your own site

<a href="https://agentmods.dev/agents/textura-agency/ai-design-vault/motion-reviewer"><img src="https://agentmods.dev/badge/agents/textura-agency/ai-design-vault/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/textura-agency/ai-design-vault/motion-reviewer"><img src="https://agentmods.dev/badge/agents/textura-agency/ai-design-vault/motion-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 585 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	$0.00051	$0.00585
Opus 5.5	$0.00020	$0.00234
Sonnet 5.5	$0.00010	$0.00117
Haiku 4.5	$0.00005	$0.00059

Measured 23d ago against content hash c762a4541f99, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 23d 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 · 50 lines

How it starts

The opening of the file, as written. The whole thing — 50 lines — stays where its author put it; the contents beside it link to each section on GitHub.

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

Ground yourself in .claude/stack.json (bindings.motion, bindings.textMotion, paths.protected), then obsidian/frontend/motion-system.md, obsidian/frontend/text-motion.md and the CSS-transition exception in obsidian/frontend/design-system.md.

What you check

Rule compliance

No @keyframes anywhere; no animation library other than the configured binding.
CSS transition-* only for hover/focus/discrete state, with token-backed duration and easing. Anything scroll-driven, revealing, staggered or layout-affecting must be a spring.
In Tailwind v4, duration-fast as a bare class is dead code — there is no --duration-* namespace.
Text motion: no manual/imperative mode where a scroll mode exists; a flex split container needs justify-* as well as text-*; leading ≥ 1.1 wherever overflow clips.
Nothing in paths.protected modified.

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?
Is anything reading layout (getBoundingClientRect, scrollY) more than once per frame, or inside a scroll handler that also writes styles?
With prefers-reduced-motion, is all content present and readable?
Hydration cost: is a whole section shipped to the client just to animate one element? On an islands stack, is each island as small as it can be?
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.

Read the full file on GitHub · 50 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.

23d ago First seen · 50 lines · 51 tokens per session scan A c762a4541f99

Subscribe to this mod's changes

motion-reviewer is an agent published in the GitHub repository textura-agency/ai-design-vault (25 stars, last pushed 2mo ago), licensed Unlicense. It adds 51 tokens to every session and 585 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-10-14.

CSS and styling Design and UX Frontend

motion-reviewer next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
motion-reviewertextura-agency/ai-design-vault	Agent	25	2mo ago	Unlicense	A	51	Claude Code
a11y-auditoreduclopez/ui-craft	Agent	433	yesterday	MIT	A	49	Claude Code
ui-developerMadAppGang/claude-code	Agent	287	7mo ago	MIT	A	338	Claude Code
wireframe-reviewerkumaran-is/claude-code-onboarding	Agent	36	4mo ago	MIT	A	77	Claude Code
gem-designerKIMISKI33/awesome-copilot	Agent	1	2mo ago	MIT	A	22	Claude Code
design-performance-criticClaude-Code-Community-Ireland/claude-code-resources	Agent	12	5mo ago	MIT	A	48	Claude Code
ui-ux-designeropencue/cuecards	Agent	7	yesterday	MIT	A	427	Claude Code

ai-design-vault: Agent for Claude Code