A Dressmaker commission is a set of requirements: style scores, fabric composition, colour percentages, trim lengths, accessory counts, a quality threshold and a budget. The solver stores validated dress recipes that satisfy a requirement set, alongside the exact score each recipe reaches for every requirement, so you can see the margin instead of trusting a claim.
Recipes come from a bounded search over the game’s own items, not from one hand-written walkthrough. That is why a cheaper or lower-Prestige dress is labelled “Found”: it is the best the search actually validated, not a proof that nothing better exists. Unlock requirements are read from the same game data, so a Prestige level or a client’s friendship level is the number the game uses rather than a guess.