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Slack Gif Creator

nexu-io/open-design

If you're creating reaction GIFs or memes for Slack, you know the pain of hitting the file size limit. This skill gives you animation primitives and validators specifically tuned for Slack's constraints, so you can programmatically generate GIFs that actually upload instead of manually compressing them in some online tool. It's from Anthropic's official skills repo, which means the primitives are designed to compose well when Claude builds animations for you. Useful when you need custom animated content that fits Slack's requirements without the trial and error of exporting, checking size, adjusting quality, repeat.

skills.sh installs: 2.8K
GitHub stars: 106.9K
last updated: Aug 21, 2026

Install

$ npx -y skills add nexu-io/open-design --skill slack-gif-creator --agent claude-code

Installs into .claude/skills of the current project.

Files

slack-gif-creator

Curated from Anthropic's official skills repository.

What it does

Create animated GIFs optimized for Slack with validators for size constraints and composable animation primitives.

Source

Upstream: https://github.com/anthropics/skills/tree/main/skills/slack-gif-creator
Category: image-generation

How to use

This catalogue entry advertises the skill in OpenDesign so the agent discovers it during planning. To run the full upstream workflow with its original assets, scripts, and references, install the upstream bundle into your active agent's skills directory:

# Inspect the upstream README for exact paths
open https://github.com/anthropics/skills/tree/main/skills/slack-gif-creator

Then ask the agent to invoke this skill by name (slack-gif-creator) or with one of the trigger phrases listed in this skill's frontmatter.

SKILL.md on GitHub

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Details

Repository: github.com/nexu-io/open-design
Category: Design & UI/UX
First seen: Jun 3, 2026

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