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common-mobile-animation

common-mobile-animation is a skill for Claude Code, Codex from HoangNguyen0403/agent-skills-standard. It costs 52 tokens per session (613 once invoked), scanned A, original, MIT.

Guidelines for motion in mobile apps, covering transition timing, easing, gestures, animation properties, and frame-rate checks. They apply to iOS, Android, and Flutter interfaces.

In plain words
What is it for?
Use it when implementing screen transitions, modals, shared-element effects, gesture-driven interactions, or checking animation performance.
Why use it?
They help animations feel consistent and responsive while reducing stutter and layout work that can slow an app down.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 565repo +4 3d ago A scan SkillSpector: pass 52 tokens original MIT

Good fit Use it when implementing screen transitions, modals, shared-element effects, gesture-driven interactions, or checking animation performance.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hoangnguyen0403/agent-skills-standard/common-mobile-animation
View source ↗ HoangNguyen0403/agent-skills-standard npmjs.com
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.

Any agent
npx skills add HoangNguyen0403/agent-skills-standard --skill common-mobile-animation
Clone the repo
git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard

Made for: Claude Code, Codex.

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 common-mobile-animation

README.md
[![agentmods](https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/common-mobile-animation/github.svg)](https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/common-mobile-animation)
Your own site
<a href="https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/common-mobile-animation"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/common-mobile-animation/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 common-mobile-animation

Your own site · 80×15
<a href="https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/common-mobile-animation"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/common-mobile-animation.svg" alt="Reviewed on agentmods" width="80" 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 613 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00052 $0.00613
Opus 5 $0.00026 $0.00307
Sonnet 5 $0.00010 $0.00123
Haiku 4.5 $0.00005 $0.00061

Measured 9d ago against content hash 09841adb6c31, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

common-mobile-animation 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 9d 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.

skills/common/common-mobile-animation/SKILL.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mobile Animation

Priority: P1 (HIGH)

Timing Standards

Duration Range Use Case
Short 100-150ms Toggles, cell press
Medium 250-350ms Navigation, modals
Long 400-600ms Shared element, complex state

Hard limit: Never exceed 600ms for any animation.

Workflow

  1. Choose duration from timing table based on interaction type.
    • Use 250-350ms for medium navigation/modals and 400-600ms for long shared-element or complex-state transitions; state the selected range in quick-start examples.
    • A quick-start example must demonstrate the Long 400-600ms shared-element or complex-state pattern; do not substitute the Medium range.
  2. Select easing curve per platform — Curves.fastOutSlowIn (Material) or easeInOut (iOS). Never use linear.
  3. Animate GPU-friendly properties (transform, opacity). Avoid width/height which trigger layout.
  4. Wire gestures using onPan / interactivePopGesture for fluid, interruptible UX.
  5. Verify frame rate in profiler — target 60fps with no jank frames.

See implementation examples for Flutter and iOS animation patterns.

References

Anti-Patterns

  • No linear easing: Feels robotic; always use platform-standard curves.
  • No layout thrashing: Avoid animating properties that trigger layout (width, padding).
  • No memory leaks: Always dispose() AnimationControllers in Flutter; invalidate timers in iOS.
  • No blocking UI: Run heavy calculations outside animation frames.

Canonical response anchors

When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:

  • interactivePopGesture

Read the full file on GitHub · 68 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago First seen · 68 lines · 52 tokens per session scan A 09841adb6c31

Subscribe to this mod's changes

common-mobile-animation is a skill published in the GitHub repository HoangNguyen0403/agent-skills-standard (565 stars, last pushed 3d ago), licensed MIT. It adds 52 tokens to every session and 613 once invoked, about $0.0003 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 2026-09-03.

Design and UXMobileReactbest-practicescoding-standardsflutternestjsnextjs
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