slack-gif-creator
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."
91
77%
Does it follow best practices?
Impact
92%
2.13xAverage score across 10 eval scenarios
Passed
No known issues
Optimize this skill with Tessl
npx tessl skill review --optimize ./skills/anthropic-slack-gif-creator/SKILL.mdEvaluation results
Bouncing Ball Slack Emoji
Emoji GIF with bounce animation
Uses GIFBuilder
Failed
100%
Emoji dimensions
Failed
100%
Bounce easing
Failed
0%
Optimize for emoji
Failed
100%
Validates GIF
Failed
100%
Thick outlines
Failed
100%
Gradient background
Failed
100%
FPS in valid range
Failed
100%
Duration under 3 seconds
Failed
100%
Colors in valid range
Failed
100%
Layered shapes
Failed
100%
PIL drawing
Failed
100%
84%
56%Welcome Banner GIF for Slack Channel
Message GIF with slide animation
Message dimensions
0%
100%
Slide easing
0%
100%
Uses GIFBuilder
0%
100%
draw_star helper
0%
100%
Gradient background
0%
100%
draw_text helper
0%
0%
Validates output
0%
100%
Thick outlines
100%
62%
Contrasting outlines
100%
28%
FPS in valid range
100%
100%
Colors in valid range
0%
100%
No emoji fonts
100%
100%
Pulsing Heart Slack Emoji
Pulsing heartbeat emoji animation
Sine-based pulse
Failed
100%
Scale range
Failed
80%
PIL shape primitives
Failed
100%
Uses GIFBuilder
Failed
100%
Emoji dimensions
Failed
100%
Optimize for emoji
Failed
100%
Validates GIF
Failed
100%
Thick outlines
Failed
100%
Visual depth
Failed
100%
Duration under 3 seconds
Failed
100%
No emoji fonts
Failed
100%
No pre-packaged graphics
Failed
100%
Celebration Firework Burst Emoji
Particle burst explosion effect
Random particle angles
100%
Failed
Random velocities
100%
Failed
Gravity simulation
100%
Failed
Particle fade out
100%
Failed
RGBA or blend approach
50%
Failed
Uses GIFBuilder
0%
Failed
Emoji dimensions
0%
Failed
Optimize for emoji
0%
Failed
Validates output
0%
Failed
Gradient background
0%
Failed
Thick drawing lines
0%
Failed
Duration under 3 seconds
100%
Failed
100%
44%Energetic Star Reaction Emoji
Spinning star with shake effect
BICUBIC rotation
0%
100%
Sine/cosine shake
100%
100%
Random shake variation
100%
100%
Combined animations
100%
100%
Uses GIFBuilder
0%
100%
Emoji dimensions
0%
100%
Optimize for emoji
0%
100%
Validates output
0%
100%
PIL drawing primitives
100%
100%
Thick outlines
100%
100%
Layered star detail
100%
100%
Gradient background
0%
100%
No pre-packaged graphics
100%
100%
- Repository
- boisenoise/skills-collections
- Commit
636b862
- Evaluated
- Agent
- Claude Code
- Model
- Claude Sonnet 4.6
Table of Contents
Is this your skill?
If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.