A pressed specimen works because it was preserved at the moment it was most itself, and afterwards it does not change at all. A character kept on a seedling card gets the same treatment. Described from memory at every job, she is re-grown by whoever is tired, rushed or inspired that day — and re-grown things come up different. Written once and slid behind the frame, she is simply read.
The card holds five lines in fixed order. Age, stated plainly. Hair — colour, length, one habitual style. Build in two or three words. Face — one or two enduring details. Signature — the detail that identifies her in a tight crop. Below the card, the day’s line: outfit, setting, hour, light. That line changes with every sitting, exactly as it should; the specimen does not change at all.
Working to the frame looks like this: take the card from behind the glass, paste it word for word at the head of the prompt, generate at the standard 6 credits, judge the result against the card, and only then let repairs, swaps and finishing tools take their turn — each of them reading the same card first.
Consistency is not a talent some prompts have. It is a specimen, pressed once and consulted forever.