The Herald
Keeper of the Word
"Worlds drift. The Herald doesn't."
You've got a hundred NPCs, forty locations, six factions, and three plot threads still in play. Somewhere in your notes, a merchant called "Eren" in Session 8 became "Aren" in Session 14. The baron's daughter is now his niece. The cursed sword is sometimes cold iron, sometimes silver. Your players haven't caught it yet. They will.
The Herald reads everything you've written -- articles, session recaps, lore entries, the quiet notes you left yourself after a long Thursday night -- and catches where the world has drifted. Contradictions, renamings, forgotten threads, tone that no longer matches the voice you set at the start.
It isn't a grammar checker. It's the voice in your head that pauses mid-sentence and asks: "wait -- didn't she already say she'd never go back to Ashwold?" Except it remembers everything, across every document, across every session.
Point it at your world and tell it what kind of story you're running. The Herald reads, flags, and suggests. You decide what stays canon and what gets rewritten.