Slack GIF Creator
This toolkit helps developers build animated GIFs that meet Slack's technical specifications, with libraries for assembling frames, validating output, and applying motion effects.
Install
/plugin marketplace add anthropics/skillsThen run /plugin to install the skill set that includes it. In Claude.ai and the Claude app, Anthropic skills are built in: turn them on in Settings → Capabilities.
npx skills add anthropics/skills --skill slack-gif-creatorgit clone --depth 1 https://github.com/anthropics/skills.git /tmp/skills
mkdir -p ~/.claude/skills
cp -r /tmp/skills/skills/slack-gif-creator ~/.claude/skills/slack-gif-creatorPersonal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.
What this skill does
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.
Trigger phrases
Claude loads this skill automatically when you say things like:
How it works
- Initialize a builder with target dimensions (128x128 for emoji, 480x480 for messages)
- Generate frames using PIL's drawing primitives
- Save with optimization using GIFBuilder utility
- Validate against Slack's requirements
When to use it
- When creating GIFs for Slack emoji
- When building animated reactions
- When making Slack-optimized animations
Best practices
- Use correct dimensions for target use case
- Apply easing functions for smooth motion
- Validate against Slack requirements before deployment
From the SKILL.md
# Slack GIF Creator
A toolkit providing utilities and knowledge for creating animated GIFs optimized for Slack.
## Slack Requirements
**Dimensions:**
- Emoji GIFs: 128x128 (recommended)
- Message GIFs: 480x480
**Parameters:**
- FPS: 10-30 (lower is smaller file size)
- Colors: 48-128 (fewer = smaller file size)
- Duration: Keep under 3 seconds for emoji GIFs
## Core Workflow
```python
from core.gif_builder import GIFBuilder
from PIL import Image, ImageDraw
# 1. Create builder
builder = GIFBuilder(width=128, height=128, fps=10)
# 2. Generate frames
for i in range(12):
frame = Image.new('RGB', (128, 128), (240, 248, 255))
draw = ImageDraw.Draw(frame)
# Draw your animation using PIL primitives
# (circles, polygons, lines, etc.)
builder.add_frame(frame)
# 3. Save with optimization
builder.save('output.gif', num_colors=48, optimize_for_emoji=True)
```
## Drawing Graphics
### Working with User-Uploaded Images
If a user uploads an image, consider whether they want to:
- **Use it directly** (e.g., "animate this", "split this into frames")
- **Use it as inspiration** (e.g., "make something like this")
Load and work with images using PIL:
```python
from PIL import Image
uploaded = Image.open('file.png')
# Use directly, or just as reference for colors/style
```
### Drawing from Scratch
When drawing graphics from scratch, use PIL ImageDraw primitives:Details
- Skill name
slack-gif-creator- Repository
- anthropics/skills
- Path
skills/slack-gif-creator/SKILL.md
FAQ
What does the Slack GIF Creator skill do?
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.
How do I install the Slack GIF Creator skill?
Claude Code plugin: /plugin marketplace add anthropics/skills. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.
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