logo-creator

name

logo-creator

description

AI-powered logo generation with iterative design workflow. Generates logo variations using Nano Banana 2 (Gemini 3.1 Flash) via OpenRouter, then processes finalists with local tools for cropping, background removal, and SVG vectorization. Use when the user asks to create a logo, design a brand mark, generate logo concepts, or needs logo variations for a project. Triggers: 'create a logo', 'design a logo', 'logo for', 'brand mark', 'logo variations', 'generate logos'.

Logo Creator

Generate professional logo variations using AI, then process selected finalists into production-ready assets (cropped PNG, transparent PNG, scalable SVG).

Setup

All scripts use uv run with inline dependencies — no manual install needed.

Environment

export OPENROUTER_API_KEY="your-openrouter-api-key"

Running Scripts

All script paths below are relative to this skill's directory. Prefix every script invocation as follows:

• batch_generate.py, crop_logo.py, preview_gallery.py: uv run --with requests --with Pillow python3 scripts/SCRIPT.py
• remove_bg.py: uv run --with "rembg>=2.0.57" --with Pillow --with onnxruntime --python 3.10 python3 scripts/remove_bg.py (requires Python 3.10 due to numba)
• vectorize.py: uv run --with vtracer python3 scripts/vectorize.py

Workflow

Step 1: Gather Brief

Collect from the user:

• Brand/project name and what it does
• Style direction: minimalist, geometric, wordmark, lettermark, mascot, abstract, pixel art, 3D, etc.
• Color preferences: specific hex codes, palette direction, or "surprise me"
• Aspect ratio: 1:1 (default), 16:9, 3:2, etc.
• Reference images or logos they like (optional)
• Must include/exclude: specific symbols, letters, concepts

Craft a detailed prompt. Good prompts specify: subject, style, colors, composition, and what to avoid. Example:

"Minimalist geometric logo for a tech consulting firm called 'Vector Labs'. Abstract V shape formed by intersecting lines. Colors: deep navy (#1a2332) and electric blue (#4a9eff) on white background. Clean, professional, no gradients. Flat design suitable for both dark and light backgrounds."

Step 2: Generate 10 Variations

PROJECT=.skill-archive/logo-creator/$(date +%Y-%m-%d)-projectname
mkdir -p $PROJECT

OPENROUTER_API_KEY="your-openrouter-api-key" \
uv run --with requests --with Pillow python3 scripts/batch_generate.py \
  --prompt "YOUR DETAILED PROMPT" \
  --output-dir $PROJECT \
  --count 10 \
  --workers 5 \
  --aspect-ratio 1:1 \
  --size 1K \
  --prefix logo

Step 3: Build Preview Gallery

uv run --with Pillow python3 scripts/preview_gallery.py \
  --input-dir $PROJECT \
  --output $PROJECT/preview.html \
  --title "Project Name"

Open preview.html in browser. User clicks cards to mark favorites. Gallery supports checker/white/dark background toggle.

Ask the user which logos to keep, iterate on, or discard.

Step 4: Iterate (if needed)

Generate refined variations with adjusted prompts and version suffixes:

OPENROUTER_API_KEY="your-openrouter-api-key" \
uv run --with requests --with Pillow python3 scripts/batch_generate.py \
  --prompt "REFINED PROMPT" \
  --output-dir $PROJECT \
  --count 5 \
  --prefix logo-v2

Rebuild gallery after each round. Repeat until user approves finalist(s).

Step 5: Finalize Selected Logos

For each approved logo, run three processing steps:

Crop whitespace:

uv run --with Pillow python3 scripts/crop_logo.py \
  INPUT.png OUTPUT-cropped.png --ratio 1:1 --padding 20

Remove background:

uv run --with "rembg>=2.0.57" --with Pillow --with onnxruntime --python 3.10 \
  python3 scripts/remove_bg.py INPUT.png OUTPUT-transparent.png

First run downloads ~170MB model. Subsequent runs are instant.

Vectorize to SVG:

uv run --with vtracer python3 scripts/vectorize.py \
  INPUT-transparent.png OUTPUT.svg --detail medium --colormode color

Detail presets: low (simpler/smaller), medium (balanced), high (finest detail).

Step 6: Deliver Final Assets

projectname/
  logo-03.png              # Original generation
  logo-03-cropped.png      # Whitespace removed, 1:1
  logo-03-transparent.png  # Background removed
  logo-03.svg              # Scalable vector

Script Reference

Script	Purpose	Key args
batch_generate.py	Generate variations via OpenRouter	--prompt, --count 10, --workers 5, --aspect-ratio, --size
crop_logo.py	Remove whitespace, enforce ratio	--ratio 1:1, --padding 20
remove_bg.py	Remove background (local AI)	--model birefnet-general
vectorize.py	PNG to SVG conversion	--detail low/medium/high, --colormode color/binary
preview_gallery.py	HTML comparison gallery	--input-dir, --title

Prompt Crafting Tips

• Be specific about style: "flat minimalist" not just "modern"
• Mention negative constraints: "no gradients, no text, no 3D effects"
• Specify background: "on pure white background" or "on transparent background"
• For wordmarks, spell out the exact text: "the word 'ACME' in..."
• Request multiple concepts in one prompt: "Option A: abstract mark. Option B: lettermark"
• Aspect ratio 1:1 works best for icon-style logos; 3:2 or 16:9 for horizontal wordmarks