Everything you need to write about Prosa.

One line

Prosa is a story bible and consistency check for fiction writers.

Short

Prosa reads a writer's whole manuscript, builds their story bible for them, and flags the details that don't match across the book, each with the passages that prove it. It never writes a word for the writer, and manuscripts are never used to train AI.

Long

You write. Prosa remembers. Prosa is a story bible and consistency check for fiction writers. A writer brings the draft they already have, and Prosa reads every chapter. It builds the story bible for them: the characters, places and objects in the draft, with the details the book has established, each linked to the page it came from. Then it checks the whole book for places where it disagrees with itself, like a scar that changes wrists or a name spelled two ways. Each finding shows both passages, and the writer decides which one is right. Behind it is Shepherd, a purpose-built engine that reads an entire manuscript and holds the story as one connected model it can check for consistency. Prosa reads; it never writes, and manuscripts are never used to train AI.

Shepherd is the engine behind Prosa, built and refined over months with real authors. It reads the entire manuscript, works out the whole cast across hundreds of pages, and holds the story as one connected model it can check for consistency, across every chapter of even a very long book. It reads; it never writes.