How do I ensure the GIF will look good in Slack's dark and light modes?

The skill encourages using thick outlines, vibrant colors, and transparent backgrounds or gradients to ensure high visibility across different Slack themes.

Can I use existing images to create an animation?

Absolutely. The skill is designed to work with user-uploaded images via the PIL library, allowing you to animate existing assets or use them as templates for new designs.

What types of animation effects are available?

The toolkit includes predefined logic for shaking, pulsing, bouncing, spinning, fading, sliding, zooming, and particle bursts, all of which can be customized with easing functions.

Does this skill support Slack's specific file size limits?

Yes, it includes optimization strategies such as color reduction (48-128 colors), frame rate adjustment, and duplicate frame removal to ensure GIFs stay under Slack's upload limits.

Slack GIF Creator

Name: Slack GIF Creator
Author: macnversion

bymacnversion

0•

Collaboration Tools

Generates and optimizes high-quality animated GIFs and custom emojis specifically tailored for Slack's technical requirements.

The Slack GIF Creator skill provides a comprehensive toolkit for programmatically generating polished animations within the Claude Code environment. It streamlines the creation of custom Slack emojis and message-based GIFs by handling technical constraints like dimensions, frame rates, and color palettes. With built-in easing functions, frame validators, and advanced drawing utilities, it allows developers to create sophisticated visual assets—ranging from simple bouncing shapes to complex particle bursts—ensuring every output is perfectly optimized for the Slack platform.

Key Features

01Integrated validation tools to verify Slack upload readiness

02Automated optimization for Slack emoji (128x128) and message (480x480) specs

03Frame helpers for creating gradients, complex polygons, and polished visual depth

04GIFBuilder utility for efficient frame assembly and color palette reduction

050 GitHub stars

06Advanced easing library for smooth motion including bounce, elastic, and ease-in-out

Use Cases

01Generating custom, branded company emojis from scratch or source images

02Programmatically transforming static screenshots into optimized Slack walkthroughs

03Creating dynamic, animated status updates for Slack bot notifications

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add macnversion/skills slack-gif-creator

For use in Claude.ai and ChatGPT

Download Skill