Coloring page

**Quick judgment:** A focused, high-utility skill that reliably turns photos into printable black‑and‑white coloring pages using an external image model. Strong fit for family, education, and light creative workflows where users provide a single image and want a clean outline result. **Strengths** - Purpose-built: It does one thing—photo → outline coloring page—and the interface is minimal (just `--in`, optional `--out`, and `--resolution`). - Good assistant integration: Ideal for conversational use ("create a coloring page" after uploading an image), minimal parameter tuning. - Flexible output quality: 1K/2K/4K resolutions make it suitable for both quick prints and higher-quality pages. **Risks / Limitations** - **External dependency:** Requires a valid `GEMINI_API_KEY`, `uv`, and the underlying nano-banana-pro setup; failures or misconfiguration will break the skill. - **Content handling:** Any sensitive or private photos are sent to the Gemini image model; this may not meet strict privacy/compliance requirements. - **Input constraints:** Only raster images are supported; non-photo inputs or very low-quality images may produce poor or noisy outlines. - **Narrow scope:** No advanced editing controls (e.g., line thickness, style variants, or batch processing) beyond resolution. **Recommended scenarios** - Assistants for parents or teachers generating custom coloring pages from personal or classroom photos. - Creative or hobbyist workflows where users frequently turn reference photos into line art for coloring. - Simple “upload-and-transform” image utilities inside larger chat experiences, where minimal configuration and quick turnaround are more important than fine-grained control.