Computational (agent-based) models are interpretations of the balance systems described in Monetary Economics, a book written by Wynne Godley and Marc Lavoie (G&L). Agent-based models solve computationally; not as a system of equations. Models must remain consistent with G&L accounting.
No model is the world. The well known aphorism "all models are wrong, but some are useful" comes to mind. I make every effort to ensure the accounting at the core of my agent-based models faithfully reproduce G&L descriptions. Models spring from my nascent, bounded, comprehension of reading materials describing a simple monetary system.