Non-custodial routing

A router can either move money or name a destination. Sato Route names one: it returns the venue it chose, the aggregator's own quote and calldata, and the full ladder of readings it chose on. You sign it with your own wallet, and nothing is held, netted or forwarded at any point.

This is a structural property, not a policy. There is no account to fund, no balance to reconcile and no facilitator role being played, so there is nothing to custody even in principle.

A route is a recommendation from dated readings, never a promise of price or fill. A quote is a quote; the trade that lands is whatever the venue executes when the signed transaction arrives.