Marks carry half the conditions of a world: a technique opens by one, a mission counts by another, clan membership is proven by a third. Yet they lived as bare slugs in text fields — and what a given key actually unlocked was known to the GM alone.
Registry — every mark of the world with a name, a description and a category
Where it works — techniques, dialogues, shopfronts, loot: every place the key is wired into
How many characters carry it — with a link straight to where the condition is set
Pick, don't type — a mark comes from the list instead of being typed by hand
A key is no longer a string in a field: it has a name, a meaning and a list of places where it decides something.