What are the recommended dimensions for Slack GIFs?

For custom emojis, 128x128 pixels is recommended. For standard message GIFs, 480x480 pixels is the ideal size.

What kind of animation effects are supported?

The skill supports a wide range of effects including shakes, pulses, bounces, rotations, fades, zooms, and complex particle bursts using built-in easing functions.

How does the skill handle GIF optimization?

It optimizes file size by adjusting FPS (typically 10-30), reducing the color palette to between 48 and 128 colors, and removing duplicate frames during the save process.

Can I use external images with this skill?

Yes, the skill can load user-uploaded images using PIL (Pillow), allowing you to animate existing assets or use them as frames within a larger sequence.

Slack GIF Creator

Name: Slack GIF Creator
Author: anthropics

byanthropics

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24,065

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Collaboration Tools

Generates professional, Slack-optimized animated GIFs and emojis using Python-based animation primitives and easing functions.

The Slack GIF Creator skill provides Claude with a comprehensive toolkit for designing, animating, and optimizing GIFs specifically for the Slack environment. It manages technical constraints like specific dimensions (128x128 for emojis), color depth, and frame rates to ensure compatibility and fast loading. With built-in support for easing functions, frame composition, and image processing via PIL, it allows for the creation of sophisticated animations ranging from simple pulsing icons to complex particle bursts and UI-driven motion graphics.

Key Features

01Advanced easing library including bounce, elastic, and cubic bezier curves for smooth motion

02Slack-specific optimization for both custom emojis and inline message GIFs

0324,065 GitHub stars

04Automated validation tools to ensure GIFs meet platform size and performance requirements

05Dynamic frame composition using PIL primitives for high-quality vector-like rendering

06Efficient file size management through color palette reduction and duplicate frame removal

Use Cases

01Transforming static user-uploaded logos into dynamic, eye-catching reactions

02Creating custom branded animated emojis for team workspace culture

03Generating animated progress indicators or status alerts for Slack integrations

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add anthropics/skills slack-gif-creator

For use in Claude.ai and ChatGPT

Download Skill