Monochrome Hand-Drawn Sketch Transformation

{
  "description": "Transform the uploaded image into a high-contrast, hyper-detailed, monochrome hand-drawn sketch. The focus is only on the main subject not the background. The style should be an artistic blend of fine graphite pencil work and bold charcoal shading. Incorporate visible cross-hatching and expressive line work to define contours and shadow. The resulting image must have the rich texture and tonal depth of a masterful, traditional drawing."
}