Graffiti Sketch Style AI Builder

Depict [{argument name="Subject" default="an awesome AI builder"}] in a doodle-sketch style, presenting an overall visual effect of quick sketching, free deformation, improvised hand-drawing, and a draft-like look. The lines should be casual and exaggerated, varying in thickness, slightly messy but rhythmic and expressive, emphasizing simplification, exaggeration, fun, and spontaneity rather than strict realism or fine detail. Colors should use rough, visibly dry-brushed block shading, retaining uneven smudges, brush strokes, dry-brush streaks, and overlapping marks; the colors should automatically adapt based on [{argument name="Theme" default="an awesome AI builder"}], while the overall expression stays doodle-like, sketch-like, and simplified. No transparent watercolor bleeding effects, no fine watercolor gradients, no paper texture, no soft blur, no dreamy texture. The background should mainly be blank space, keeping things simple, relaxed, unfinished-looking, and design-conscious; a small number of auxiliary symbols, arrows, marks, circling, repeated lines, casually handwritten text, or other doodle elements may be added to enhance the sketchbook or note-like visual language, but it should not become too crowded and must not disrupt the subject or the sense of blank space. The content of the image does not need to be spelled out in advance; based on [{argument name="Subject image" default="an awesome AI builder"}], automatically infer and generate the most fitting subject image, pose, related elements, symbols, or simplified scene, keeping an overall unified doodle-sketch style and exaggerated, simplified expression, avoiding complex realistic backgrounds and excessive elaboration. A signature "BlanPlan" should be naturally worked into the image as part of the composition, placed subtly but clearly, positioned in the bottom-left, bottom-right, or near the title; its style should match the overall layout, like an artist's signature or a design credit; the signature font should be refined, restrained, and premium, not too large, must not disrupt the main composition, and must not look out of place or cheap.