slack-gif-creator
Toolkit for creating animated GIFs optimized for Slack, with validators for size constraints and composable animation primitives.
Skill by mattmre
Install
Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.
npx agentmarket install skill/mattmre-slack-gif-creator
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About
Use cases: productivity
Reviews
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What's inside
- Skill name
slack-gif-creator- Description
- Toolkit for creating animated GIFs optimized for Slack, with validators for size constraints and composable animation primitives. This skill applies when users request animated GIFs or emoji animations for Slack from descriptions like "make me a GIF for Slack of X doing Y".
- License
- MIT
- Instructions
- 642 lines in SKILL.md · view on GitHub
Before installing
- Ships executable scripts
Agent Skills spec issues
- body: 642 lines (spec recommends under 500)
Files (23)
- LICENSE.txt
- SKILL.md
- color_palettes.py · core/
- easing.py · core/
- frame_composer.py · core/
- gif_builder.py · core/
- typography.py · core/
- validators.py · core/
- visual_effects.py · core/
- requirements.txt
- bounce.py · templates/
- explode.py · templates/
- fade.py · templates/
- flip.py · templates/
- kaleidoscope.py · templates/
- morph.py · templates/
- move.py · templates/
- pulse.py · templates/
- shake.py · templates/
- slide.py · templates/
- spin.py · templates/
- wiggle.py · templates/
- zoom.py · templates/
SKILL.md (first lines)
# Slack GIF Creator - Flexible Toolkit
A toolkit for creating animated GIFs optimized for Slack. Provides validators for Slack's constraints, composable animation primitives, and optional helper utilities. **Apply these tools however needed to achieve the creative vision.**
## Slack's Requirements
Slack has specific requirements for GIFs based on their use:
**Message GIFs:**
- Max size: ~2MB
- Optimal dimensions: 480x480
- Typical FPS: 15-20
- Color limit: 128-256
- Duration: 2-5s
**Emoji GIFs:**
- Max size: 64KB (strict limit)
- Optimal dimensions: 128x128
- Typical FPS: 10-12
- Color limit: 32-48
- Duration: 1-2s
**Emoji GIFs are challenging** - the 64KB limit is strict. Strategies that help:
- Limit to 10-15 frames total
- Use 32-48 colors maximum
- Keep designs simple
- Avoid gradients
- Validate file size frequently
## Toolkit Structure
This skill provides three types of tools:
1. **Validators** - Check if a GIF meets Slack's requirements
2. **Animation Primitives** - Composable building blocks for motion (shake, bounce, move, kaleidoscope)
3. **Helper Utilities** - Optional functions for common needs (text, colors, effects)
**Complete creative freedom is available in how these tools are applied.**
## Core Validators
To ensure a GIF meets Slack's constraints, use these validators:
```python
from core.gif_builder import GIFBuilder
# After creating your GIF, check if it meets requirements
builder = GIFBuilder(width=128, height=128, fps=10)
# ... add your frames however you want ...
# Save and check size
info = builder.save('emoji.gif', num_colors=48, optimize_for_emoji=True)
# The save method automatically warns if file exceeds limits
# info dict contains: size_kb, size_mb, frame_count, duration_seconds
```
**File size validator**:
```python
from core.validators import check_slack_size
# Check if GIF meets size limits
passes, info = check_slack_size('emoji.gif', is_emoji=True)
# Returns: (True/False, dict with size details)
```
**Dimension validator**:
```python
from core.validators import validate_dimensions
# Check dimensions
passes, info = validate_dimensions(128, 128, is_emoji=True)
# Returns: (True/False, dict with dimension details)
```
**Complete validation**:
```python
from core.validators import validate_gif, is_slack_ready
# Run all validations
all_pass, results = validate_gif('emoji.gif', is_emoji=True)
# Or quick check
if is_slack_ready('emoji.gif', is_emoji=True):
print("Ready to upload!")
```
## Animation Primitives
These are composable building blocks for motion. Apply these to any object in any combination:
### Shake
```python
from templates.shake import create_shake_animation
# Shake an emoji
frames = create_shake_animation(
object_type='emoji',
object_data={'emoji': '😱', 'size': 80},
num_frames=20,
shake_intensity=15,
direction='both' # or 'horizontal', 'vertical'
)
```
### Bounce
```python
from templates.bounce import create_bounce_animation
# Bounce a circle
frames = create_bounce_animation(
object_type='circle',
object_data={'radius': 40, 'color': (255, 100, 100)},
num_frames=30,
bounce_height=150
)
```
### Spin / RotateFrom mattmre/EVOKORE-MCP-PUBLIC, MIT.
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Signals
- Stars
- 3
- Forks
- 0
- Open issues
- 0
- Last commit (this folder)
- May 21, 2026 (5 months ago)
- Last release
- May 22, 2026 (5 months ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- Repository
- github.com/mattmre/EVOKORE-MCP-PUBLIC
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
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Cite this page
slack-gif-creator skill. Agent Mart. https://agentmart.dev/skills/mattmre-slack-gif-creator (last updated 2026-10-24)