Common Mobile Animation Agent Skill

Apply motion design principles for mobile apps covering timing curves, transitions, gestures, and performance-conscious animations. Use when implementing screen transitions, gesture-driven interactions, shared-element animations, or optimizing animation frame rates on iOS, Android, or Flutter.

671 tokens

context cost

SKILL.md, read when the skill is used

files

plus reference files

copies elsewhere

how many repositories repackaged it

536

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/HoangNguyen0403/agent-skills-standard --skill common-mobile-animation

What comes with it

4 225 bytes besides the instruction

evals/evals.json

references/animation-patterns.md

references/implementation.md

The instruction itself

8 sections, as written by the author

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

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.
Select easing curve per platform — Curves.fastOutSlowIn (Material) or easeInOut (iOS). Never use linear.
Animate GPU-friendly properties (transform, opacity). Avoid width/height which trigger layout.
Wire gestures using onPan / interactivePopGesture for fluid, interruptible UX.
Verify frame rate in profiler — target 60fps with no jank frames.

See implementation examples for Flutter and iOS animation patterns.

References

Animation Patterns

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.

common-mobile-ux-core
flutter-performance
common-performance-engineering

Canonical response anchors

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

interactivePopGesture

Other skills for the same job

different authors, same section of the catalogue

Canvas Design

by anthropics

vendor ×16

Create beautiful visual art in .png and .pdf documents using design philosophy. You should use this skill when the user asks to create a poster, piece of art, design, or other static piece. Create original visual designs, never copying existing artists' work to avoid copyright violations.

Creating algorithmic art using p5.js with seeded randomness and interactive parameter exploration. Use this when users request creating art using code, generative art, algorithmic art, flow fields, or particle systems. Create original algorithmic art rather than copying existing artists' work to avoid copyright violations.

Improves the quality of images, especially screenshots, by enhancing resolution, sharpness, and clarity. Perfect for preparing images for presentations, documentation, or social media posts.

Create and edit JSON Canvas files (.canvas) with nodes, edges, groups, and connections. Use when working with .canvas files, creating visual canvases, mind maps, flowcharts, or when the user mentions Canvas files in Obsidian.

Publish Markdown articles to X (Twitter) Articles editor with proper formatting. Use when user wants to publish a Markdown file/URL to X Articles, or mentions "publish to X", "post article to Twitter", "X article", or wants help with X Premium article publishing. Handles cover image upload and converts Markdown to rich text automatically.

3.1k tokens scripts zh

Video Downloader

by CommandCodeAI

×4

Downloads videos from YouTube and other platforms for offline viewing, editing, or archival. Handles various formats and quality options.

671 tokens

High End Visual Design

by lornshrimp

×3

Teaches the AI to design like a high-end agency. Defines the exact fonts, spacing, shadows, card structures, and animations that make a website feel expensive. Blocks all the common defaults that make AI designs look cheap or generic.

Lightweight WSI tile extraction and preprocessing. Use for basic slide processing tissue detection, tile extraction, stain normalization for H&E images. Best for simple pipelines, dataset preparation, quick tile-based analysis. For advanced spatial proteomics, multiplexed imaging, or deep learning pipelines use pathml.

5.2k tokens

How to use it

Copy the folder

Take hoangnguyen0403/common-mobile-animation from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.