Kelly, Mangold, Taeuber-Arp, and Stella were the key references. Each works through reduction, sets a shaped edge against a flat color field, and draws a line that implies continuation beyond the surface it's on. We understood the material seam at Swoop ADU in the same way: a line abstracted until it reads continuously from the main house through to the ADU.
Ellsworth Kelly cuts the curve out of the wall and turns the room into a frame. Robert Mangold draws the square inside the circle until the two contain each other. Sophie Taeuber-Arp builds compositions where the half-circle, the disc, and the square arrive in tight rhythm, each one displacing the next. Frank Stella takes the protractor and the half-round and treats them as armatures for color, so the geometry becomes a kind of fretwork the hues are stretched across.