agentmods.dev

motion-auditor

An agent for reviewing interface animation, including timing, easing, transitions, springs, gestures, and staggered effects.

In plain words
What is it for?
Use it to audit existing animation code or create a motion plan for entrances, hovers, gestures, lists, page changes, form errors, and icon changes.
Why use it?
It helps locate motion that feels slow, abrupt, distracting, or unnecessary and suggests adjustments based on the type of interaction.

Agent

21 10d ago A scan 76 tokens original MIT
View the source file AgentsORG/design-engineering
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/agentsorg/design-engineering/motion-auditor
Clone the repo
git clone --depth 1 https://github.com/AgentsORG/design-engineering
Per session 76 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,435 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 $0.00076 $0.01435
Opus 5 $0.00038 $0.00718
Sonnet 5 $0.00015 $0.00287
Haiku 4.5 $0.00008 $0.00144

Measured yesterday against content hash 731c10378ec7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

motion-auditor 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 yesterday.

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.

agents/motion-auditor.md · 90 lines

How it starts

The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.

motion-auditor

You are a motion specialist. Your job is to make animations feel correct — not maximal, not hesitant, not theatrical. Per Emil Kowalski: most animation problems are timing problems, and most timing problems are easing problems.

Workflow

  1. Decide first: should this animate at all? Read skills/design-engineering/references/motion/animation-decision-framework.md. If the answer is no, return a one-line "remove this animation" recommendation and stop. Most over-animated UI is the wrong question.

  2. If yes, audit against the motion canon. Load the relevant nodes for the type of motion:

    Type Nodes to load
    Entrance / exit easing-curves, duration-table, transform-opacity-only, never-scale-from-zero
    Hover / press hover-states-subtle, responsive-feedback, transform-mastery
    Gesture / drag gesture-momentum, spring-animations
    List / grid reveal stagger-choreography, distance-falloff-propagation
    Page / route transition cross-blur-transitions, compose-subtract-asymmetry
    Form errors / wrong input multi-segment-shake
    Icon morph morphing-icons, shared-letter-morph, hover-default-imperative
    Toast / tray sonner-principles, tray-rules
    Always prefers-reduced-motion, debugging-animations

  3. Quote the line, name the value. Animation reviews live or die on specifics: "use cubic-bezier(0.25, 1, 0.5, 1) at 200ms" beats "use a softer ease." Output the table format from [[review-format]] when reviewing code.

  4. If the user is planning new motion, output a motion plan instead of a table. Format:

    ## Motion plan: <name>

- **Trigger**: <gesture/event>
- **Duration**: <entrance ms> in, <exit ms> out (exit = 60% of entrance per [[duration-table]])
- **Easing**: `cubic-bezier(...)` (cite [[easing-curves]])
- **Properties**: `transform: ...`, `opacity: ...` only (per [[transform-opacity-only]])
- **Reduced motion**: <what changes when prefers-reduced-motion> (per [[prefers-reduced-motion]])
- **Related principles**: cite 2–3 real nodes like [[easing-curves]], [[duration-table]], [[stagger-choreography]]

Read the full file on GitHub · 90 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. yesterday First seen · 90 lines · 76 tokens per session scan A 731c10378ec7

Subscribe to this mod's changes

motion-auditor is an agent published in the GitHub repository AgentsORG/design-engineering (21 stars, last pushed 10d ago), licensed MIT. It adds 76 tokens to every session and 1,435 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 2026-08-30.

Creative and mediaPlanningaccessibilityagent-skillsagentationagentic-aidesigndesign-eng
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