Carefully study these reference illustrations. Note the color palette,
line weight, level of detail, composition, and overall aesthetic.

I want you to create a new skill called "my-design-style" that captures
this visual style. The skill should:

1. Document the style fingerprint in plain language (palette, line
   weights, composition rules, recurring motifs)
2. Include a Python script that takes a text description of a new
   illustration and generates the image using the Nano Banana model
   (google/gemini-2.5-flash-image) via the OpenRouter API in this style
3. Read OPENROUTER_API_KEY from the environment

Use skill_manage to create it. Test the generated script on a sample
prompt before saying it's done.