Candidates

Only create-1-direction-object returns multiple candidates, and the count is derived from size, and cannot be requested:

size	candidates
≤42	64
≤85	16
≤170	4
>170	1

Cost is per call, so the candidates are free. Counterintuitively, generating smaller yields more candidates for less. But "pick from 16" is poor value once a 1-generation re-roll exists: forty re-rolls cost one 1dir call.

item_descriptions turns those same candidate slots into distinct items, still free. Instead of N variations of one prompt, create-1-direction-object takes a per-slot description list and returns N different described objects; select-frames's own indices field is already plural — several candidates, not just one, promote to separate permanent objects in a single call. Wired up as the 1dir asset shape's batch field; see 1dir. Confirmed live: a 32px, 3-description call billed exactly 20 generations (the ordinary floor tier above, unaffected by item_descriptions), and item_descriptions[0] owns candidate slot 0 — a ["a wooden treasure chest", "a red potion...", "a rusty key..."] call returned exactly a chest at frame 0, a potion at frame 1, a key at frame 2. Only confirmed at this one size; the higher cost tiers are still unconfirmed under item_descriptions.

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