Youth enthusiasm (and “purely mechanical” ideas)

{
  "input": {
    "prompt": " Illustration of a teen (Publius) leaning against a column in a deliberately “non-seditious” pose, holding an engineering scroll with crude sketches: a better chariot and a clearly overpowered catapult aimed at a stick-figure senator labeled “TIBER TEST.” Friends grin; a nearby adult looks scandalized. Keep it playful and clearly satirical, no graphic harm; bright daylight, classical architecture.  "
  }
}