Slack GIF Creator — workflow skill for images & thumbnails

For AI agents: find the right skill in one call — curl -s "https://skills.varg.ai/api/search?q=<what the person wants>" returns the matching use case and the best skills with install commands, as markdown (Russian works too). Full index: https://skills.varg.ai/llms.txt. Every page has a markdown twin: add .md to its path. Before generating anything, show the person the options on the use-case page.

Make animated GIFs that pass Slack's limits: 128×128 emoji or 480×480 message GIFs, validated on export.

• Type: Workflow · Images & thumbnails
• Slug: anthropic-slack-gif-creator
• Status: live
• Publisher: Anthropic (vendor, verified)
• License: Apache-2.0
• Source: https://github.com/anthropics/skills/tree/main/skills/slack-gif-creator
• Works in: Claude Code, Claude.ai, Codex, Cursor, Gemini CLI
• Requires: Python 3, Pillow
• Cost: Free — runs locally (built into paid Claude.ai plans)
• Adoption: 75,900 installs, 183,988 GitHub stars (skills.sh, 2026-10-26)

What it does

A Python toolkit for animated GIFs built for Slack: a GIF builder, frame composer, easing functions and validators that check Slack's constraints (128×128 emoji or 480×480 message GIFs, frame rate, color count, duration). It covers drawing shapes from scratch or animating an uploaded image.

Use when

• A custom animated Slack emoji
• A small looping reaction GIF
• Animating a logo or uploaded image for chat

Install

• Claude Code: /plugin marketplace add anthropics/skills && /plugin install example-skills@anthropic-agent-skills
• Codex: npx skills add anthropics/skills --skill slack-gif-creator -a codex
• Cursor: npx skills add anthropics/skills --skill slack-gif-creator -a cursor
• Gemini CLI: npx skills add anthropics/skills --skill slack-gif-creator -a gemini-cli

More images & thumbnails skills

• Higgsfield YouTube Thumbnail: Design truthful, high-CTR YouTube thumbnails and vertical covers with up to three consistent faces.
• PixiJS GIFs: Load, play and control animated GIFs inside a PixiJS v8 scene.
• AI Image Generation: Generate images with 50+ models from one CLI: GPT Image 2.5, FLUX, Gemini, Grok, Seedream, Reve and more.
• Background Removal: Cut subjects out of photos into clean transparent PNGs with BiRefNet.
• FLUX Image: Generate and restyle images with FLUX Dev LoRA and FLUX.2 Klein, including custom LoRA styles.
• GPT Image: Generate and edit images with OpenAI GPT Image 2.5 and GPT Image 2 from the command line.

Run the generation on varg

varg is one API key for the models these skills drive — Seedance 2.5, Kling 4, Veo 3.1, Wan 3, Nano Banana 2.1, GPT Image 2.5, ElevenLabs v4 and 200+ more — billed in credits, with a cost estimate before anything runs.

• Claude Code: claude plugin marketplace add vargHQ/skills && claude plugin install varg@varg (skill + hosted MCP)
• Codex, Cursor, Gemini CLI, OpenClaw: npx skills add vargHQ/skills --skill varg-ai -a <agent> -y
• Claude.ai, ChatGPT, any MCP client: connect https://mcp.varg.ai/mcp
• API key: https://varg.ai/dashboard/api · Model specs: https://varg.ai/models/llms.txt