Knowledge and utilities for creating animated GIFs optimized for Slack. Provides constraints, validation tools, and animation concepts. Use when users request animated GIFs for Slack like "make me a GIF of X doing Y for Slack."
What it does
Slack has specific technical constraints for GIFs that most tools don't account for: maximum file size, recommended dimensions, frame rate limits, and colour palette restrictions that affect how GIFs render in the Slack client on different platforms. Claude generating a GIF without these constraints produces files that are too large to send, render poorly on mobile, or get compressed into illegibility. This skill loads Slack's GIF constraints and the animation patterns that work well within them.
Use case
Creating animated GIFs specifically for use in Slack — reactions, celebration animations, status indicators, or any looping animation intended for the Slack interface. Made by Anthropic.
"Make a celebration GIF for when we ship a big feature — confetti, keeps looping." "Create a 'thinking' animation I can use in Slack while waiting for a response." "Build a simple loading spinner GIF optimised for Slack." "Make a thumbs up animation that works in both dark and light Slack themes." "Create a subtle 'done' checkmark animation for task completion."
Describe the animation concept — what it should show, the mood, and how it loops.
Claude generates within Slack's constraints automatically: correct dimensions, optimised file size, appropriate frame rate.
Specify dark/light theme requirements if the GIF will be used in both contexts.
Input
A description of the animation: what it shows, the mood or purpose, and any Slack-specific requirements (theme compatibility, loop behaviour).
Output
An animated GIF within Slack's technical constraints: correct dimensions, under the file size limit, optimised frame rate, and palette-optimised for clear rendering in the Slack client.
npx skillsadd anthropics/skills/slack-gif-creator
npx skillsadd anthropics/skills/slack-gif-creator
Requires skills.sh CLI
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