The problem every long-form writer eventually hits isn't writer's block. It's continuity drift. The slow accumulation of small inconsistencies across chapters that compound until your character's eyes are suddenly a different colour, or a scar that was on the left is now on the right, or a relationship that ended in chapter seven is somehow intact in chapter nineteen. For original-character writers working across long arcs with large casts, this isn't an edge case. It's the default.

The OC Vault is our answer to it. It's a structured lore bible that lives inside NarrativAI and gets built passively as you write. You're not filling in forms or maintaining a separate reference document. Muse reads your drafts and extracts the facts: physical descriptions, relationship states, abilities, backstory beats, location details, timeline anchors. Everything that can be verified across chapters gets logged and cross-referenced.

When you write something that contradicts an established fact, the OC Vault catches it before you move on. Not as an interruption, but as a quiet flag in the margin, surfaced by Muse in Suggesting state and easy to dismiss if it was an intentional choice. The distinction between a continuity error and a deliberate character evolution belongs to the writer, not the tool. Muse surfaces the flag. You decide what it means.

The Vault is live in Beta now and already active for writers working on multi-chapter projects. The upcoming expansion adds relationship graph visualisation, a live map of how your characters connect that updates as you write. So continuity isn't just tracked at the property level but at the relational level too. If two characters' dynamic shifts across an arc, the graph shows it.

Shipping in Beta