SVG Draw

Create SVG images and convert them to PNG without external graphics libraries. Use when you need to generate custom illustrations, avatars, or artwork (e.g., "draw a dragon", "create an avatar", "make a logo") or convert SVG files to PNG format. This skill works by writing SVG text directly (no PIL/ImageMagick required) and uses system rsvg-convert for PNG conversion.

Security Scan

The skill's files, instructions, and requirements are coherent with its stated purpose of generating SVG and converting to PNG; nothing in the bundle requests unrelated credentials or installs unexpected tooling.

Purpose & Capability

Name/description match the included assets (SVG templates) and a small conversion script. The skill does not request unrelated credentials or binaries.

Instruction Scope

SKILL.md instructs the agent to write SVG files and run the provided conversion script (expected). It uses an absolute path (/root/.openclaw/workspace/skills/svg-draw/...) in examples — this is environment-specific but not malicious. It also mentions sending images via messaging channels but provides no external endpoints or credentials.

Install Mechanism

No install spec; the only executable is a small, non-obfuscated shell script that calls the system rsvg-convert. No downloads or archive extraction are present.

Credentials

The skill requires no environment variables or credentials. Its runtime dependency (rsvg-convert) is declared in troubleshooting and is proportional to the PNG conversion function.

Persistence & Privilege

always:false and the skill does not request permanent presence or modify other skills/config. It writes/reads files in its own workspace per instructions, which is normal for an instruction-only skill.

Assessment

This skill appears to do exactly what it claims: produce SVG text (templates included) and convert with rsvg-convert. Before installing, ensure rsvg-convert is present on your system and be aware the skill will write SVG/PNG files to the agent workspace (examples use /root/.openclaw/workspace/...). As with any SVG converter, avoid converting untrusted SVGs that might reference external resources or exploit parser bugs—inspect SVG content before converting or run conversions in a sandboxed environment. If you want less reliance on absolute paths, adjust the example invocation to use your environment's workspace path.

Generate vector graphics and raster images using pure SVG code and system conversion tools.

Quick Start

For new drawings:

1. Write SVG code directly to a file (use templates in assets/ as starting points)
2. Convert to PNG using the conversion script
3. Send via the appropriate channel (DingTalk, Telegram, etc.)

For existing SVG files:

1. Use the conversion script to convert SVG → PNG
2. Share the resulting image

Creating SVG Images

Basic Workflow

1. Choose or create a template

   • Check assets/ for existing templates (dragon, lobster, etc.)
   • Or write SVG from scratch

2. Write the SVG file

   # Example: Write SVG to file
   write('/path/to/output.svg', svg_content)
   

3. Convert to PNG

   /root/.openclaw/workspace/skills/svg-draw/scripts/svg_to_png.sh input.svg output.png 400 400
   

SVG Structure Tips

Always include:

• <svg> tag with xmlns="http://www.w3.org/2000/svg" and viewBox
• Background <rect> (prevents transparent backgrounds)
• Appropriate width and height attributes

Common SVG elements:

• Shapes: <rect>, <circle>, <ellipse>, <polygon>, <path>
• Text: <text> with text-anchor="middle" for centering
• Colors: Use hex codes or named colors
• Opacity: Add opacity attribute for transparency effects

Example character structure:

Background → Body → Head → Face features → Limbs → Accessories → Name

Converting SVG to PNG

Use the bundled conversion script:

/root/.openclaw/workspace/skills/svg-draw/scripts/svg_to_png.sh <input.svg> <output.png> [width] [height]

Parameters:

• input.svg: Source SVG file path
• output.png: Destination PNG file path
• width: Output width in pixels (default: 400)
• height: Output height in pixels (default: 400)

Example:

/root/.openclaw/workspace/skills/svg-draw/scripts/svg_to_png.sh dragon.svg dragon.png 512 512

Available Templates

Dragon Template (assets/dragon_template.svg)

Blue dragon with:

• Serpentine body with wings
• Golden eyes with highlights
• Horns and pointed ears
• Curved tail
• Magical sparkles
• Name label: "大龙 🐉"

Customization ideas:

• Change fill="#4a90d9" for different body colors
• Adjust eye color by modifying fill="#ffcc00"
• Add/remove features (scales, fire, etc.)
• Change background color

Lobster Template (assets/lobster_template.svg)

Red lobster with:

• Orange-red shell with segments
• Large claws (left and right)
• Eight walking legs
• Eyes on stalks
• Long antennae
• Tail fan
• Ocean bubbles background
• Name label: "大龙虾 🦞"

Customization ideas:

• Adjust shell color: fill="#e85d04" (darker red) or fill="#f48c06" (orange)
• Change claw size or position
• Add more bubbles
• Modify background

Design Guidelines

Color Palettes

Friendly/Cute:

• Body: #4a90d9 (blue), #f48c06 (orange)
• Accents: #ffcc00 (yellow), #ff6b6b (coral)
• Background: #1a1a2e (dark blue)

Professional:

• Use muted tones
• Stick to 2-3 main colors
• Add subtle gradients if needed

Character Design Principles

1. Keep it simple — Too many details look messy at small sizes
2. Use contrast — Light features on dark backgrounds
3. Add personality — Eyes, expressions, small details
4. Include a label — Add name/title at the bottom for context
5. Test at target size — View at 400x400 to check readability

Common Tasks

Creating an Avatar

1. Start with a template that matches the vibe (dragon, lobster, etc.)
2. Modify colors and features
3. Add personal touches (accessories, expressions)
4. Add name label at bottom
5. Convert and send

Making a Logo

1. Use simple geometric shapes
2. Limit to 2-3 colors
3. Consider scalable design
4. Test at multiple sizes
5. Export at higher resolution (800x800 or 1024x1024)

Customizing Templates

Change colors: Find fill="#" or stroke="#" attributes and replace the hex codes

Resize elements: Adjust rx, ry (ellipses) or width, height (rectangles)

Reposition: Modify cx, cy (circles/ellipses) or x, y (rectangles)

Add text:

<text x="200" y="370" font-family="Arial, sans-serif" font-size="24" font-weight="bold" fill="#ffcc00" text-anchor="middle">Your Text</text>

Resources

scripts/

• svg_to_png.sh - Convert SVG to PNG using rsvg-convert

assets/

• dragon_template.svg - Friendly blue dragon
• lobster_template.svg - Cute red lobster

Troubleshooting

SVG not rendering:

• Check for proper <svg> tag with xmlns attribute
• Ensure viewBox is set correctly
• Verify all tags are closed

Conversion fails:

• Confirm rsvg-convert is installed: which rsvg-convert
• Check file paths are correct
• Verify SVG syntax is valid

Image looks wrong:

• Test SVG in browser first
• Check coordinate system (viewBox vs width/height)
• Verify element stacking order (later elements draw on top)