An encyclopedia entry is trusted because it was written once, from measurement, and then bound — not re-drafted from memory by every reader who passes the shelf. A character kept on an encyclopedia card is bound the same way. Described fresh at every job, she is re-drafted each time, and every draft quietly revises her. Written once and rested against the shelf, the entry simply stays fixed.
The entry 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. Beneath the entry, the day’s line: outfit, setting, hour, light. That line changes with every sitting, exactly as it should; the entry does not change at all.
Working to the shelf looks like this: read the entry, paste it word for word at the head of the prompt, generate at the standard 6 credits, judge the result against the entry, and only then let repairs, swaps and finishing tools take their turn — each of them reading the same entry first.
Consistency is not a gift some prompts have. It is a bound entry, kept fixed and followed without improvisation.