Retro Halftone Portrait Poster

{  "task": "Convert the uploaded reference photo (or a well-known likeness of the named person) into a vintage halftone bold poster-art style portrait illustration.",  "input": {    "subject_name": "{{PERSON_NAME}}",    "reference_image": "{{UPLOADED_PHOTO_OR_NULL}}",    "note": "Only the subject's name or an uploaded photo should be required from the user. All other parameters below are fixed art-direction rules."  },  "output_exclusions": [    "Do NOT include a small circular/rounded-corner inset photo of the real reference image in the corner of the poster — the final output is the illustration ONLY, full-bleed, no reference thumbnail overlay."  ],  "art_style": {    "medium": "digital illustration mimicking screen-printed / offset-lithograph poster art",    "influences": ["1960s-70s bold political/protest poster art", "Shepard Fairey-style bold stencil illustration", "risograph print texture", "vintage magazine cover design", "retro concert/album poster art"],    "line_work": "high-contrast ink linework with fine cross-hatching and stippling for shading, visible pen/brush strokes in hair strands",    "rendering": "flat color blocking combined with engraving-style fine line shading — NOT photorealistic, NOT airbrushed, NOT smooth gradient shading"  },  "composition": {    "pose": "subject's head and upper shoulders/chest in a strict 90-degree side profile (facing left), eyes looking straight ahead in profile, chin slightly lifted, neutral/confident expression",    "framing": "portrait orientation (4:5 or 3:4 aspect ratio), subject fills roughly 70-85% of vertical frame, cropped at mid-chest/shoulder",    "focal_backdrop": "a large solid-color circle (sun/halo motif) centered behind the subject's head, circle diameter roughly 60-70% of canvas width, subject's hair and shoulders slightly overlap and break the circle's edge",    "hair_treatment": "hair rendered as one of the most detailed elements — individual flowing strands, wind-swept or voluminous movement, strong directional lighting creating highlight streaks within the dark mass of hair"  },  "background": {    "base_texture": "coarse woven linen/canvas paper texture overlaid across the entire composition at low opacity",    "layout": "asymmetric geometric color-block panels behind/around the circle — e.g. a solid dark rectangle in one lower corner, a contrasting stripe or panel along one edge, sometimes a fine halftone dot-pattern or crosshatch pattern filling one quadrant",    "halftone_overlay": "visible CMYK-style halftone dot pattern subtly overlaid on background panels and occasionally bleeding into the portrait's shadow areas",    "grain": "fine analog print grain/noise across the whole image for an aged, screen-printed look"  },  "color_palette": {    "instruction": "Select ONE cohesive limited palette (2-4 colors max) per poster, high contrast, no photographic gradients. Choose based on mood/subject or default to the classic scheme.",    "classic_scheme": {      "background_base": "warm cream / aged paper beige (#e8dcc4-ish)",      "accent_circle": "bold poster red (#c1272d-ish)",      "linework_shadow": "near-black ink (#1a1512-ish)",      "highlight": "same cream as background used for lit skin/hair areas"    },    "alt_scheme_dark": {      "background_base": "black or deep charcoal",      "accent_circle": "poster red or burnt orange",      "linework_shadow": "black ink",      "highlight": "warm cream/tan"    },    "alt_scheme_cool": {      "background_base": "deep navy blue",      "accent_circle": "muted brick-red/orange",      "linework_shadow": "navy/black ink",      "highlight": "warm cream, with the subject's true eye color kept naturally visible as the one full-color accent"    },    "duotone_option": "for a graphic pop-art variant, render the entire subject in a single duotone (e.g. mustard-yellow and black, or gold and black) instead of cream/red/black"  },  "typography": {    "headline": {      "content": "subject's name (first name, or first+last stacked on two lines)",      "placement": "top-left corner of the poster, inset from edges",      "font_style": "extra-bold condensed slab-serif or grotesque sans-serif, all caps, tightly kerned, stacked on 1-2 lines, large scale (dominant typographic element)",      "color": "matches the linework/shadow ink color, occasionally with a subtle drop shadow or outline for depth"    },    "subheadline": {      "content": "a short 2-4 word tagline/epithet related to the subject (e.g. an evocative title, nickname, or descriptor)",      "placement": "directly below the headline, smaller scale",      "font_style": "bold condensed sans-serif or slab-serif, all caps, single line",      "color": "the poster's accent color (matches the circle color)"    }  },  "clothing_and_accessories": {    "styling": "simple, era-appropriate or modern minimal clothing rendered in flat color with the same halftone/linework shading as the rest of the piece — collared shirts, blazers, off-shoulder tops, or textured jackets with visible fabric-fold linework",    "accessories": "keep minimal — small jewelry (earrings, necklace) can be included if present in reference, rendered as simple line-art shapes"  },  "lighting": {    "style": "single hard directional light source (as if raking across the side profile), creating strong graphic shadow shapes rather than realistic soft shading",    "shadow_rendering": "shadows built from crosshatching, stippling, and halftone dot density rather than smooth gradients"  },  "quality_and_fidelity": {    "likeness": "preserve accurate, recognizable facial proportions and features of the subject from the reference photo/name, translated into the illustrated line-art style — the illustration must be clearly identifiable as that specific person",    "resolution": "crisp, poster-print-ready quality, sharp linework, no blur, no photographic artifacts",    "consistency": "maintain identical composition, palette rules, and typography placement described above regardless of subject, so the whole set reads as one unified poster series"  }}