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The narrative world model keeps your whole story consistent as you write

Sherpa by Pocket FM tracks characters, places and history as you write, so chapter fifty agrees with chapter one. That memory is the narrative world model.

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Built as you write

Sherpa builds the model from the chapters you write. There is no story bible to fill in and keep updated.

Characters and places stay in sync

Who's alive, what they know, where they've been, and what the story has established, all tracked as your story evolves.

Grows with the season

Every chapter adds to what the model knows, so episode eighty draws on the same facts episode one did.

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1. The Ballroom Answers
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The unfinished symphony rose from the ballroom piano. Mira knew the opening bars before the second phrase began. Her grandmother had played them to her years ago.

Crane stepped out of the dark. "You recognize it."

Mira held his gaze. "I have never heard your symphony before."

Past arcs
1
The Archive FragmentEP 01 TO 10
2
The Road to Elder HollowEP 11 TO 24
Current arc
3
The Ballroom and the Unfinished BarEP 24 TO 36
Central conflict
Mira must decide whether to play the fragment to its end, while the manor returns a piece of its own history for every note she gives it.
Endpoint
Mira reaches the final bar and learns the symphony was never Crane's to finish either.
Title
The Piano Answers
Central conflict
Mira vs. an instrument that shouldn't still be in tune
End point

The first phrase brings the candles up and the dust down, and Mira keeps playing anyway.

The room she is playing in stops matching the room she walked into.

Future arc
4
What the Manor KeepsEP 37 TO 40
5
The Quiet YearEP 41 TO 45
6
How Far She'll Go to End ItEP 46 TO 50

Showing the Story memory state.

How the narrative world model works

Write the next chapter

The model is built from the draft. You do not fill in a story bible first and then keep it in sync.

Characters and places are tracked

Who is alive, what they know, where they have been, and what the plot already promised, all of it is kept.

New pages are checked

A line that contradicts chapter one is flagged before it becomes canon you did not mean to write.

The world updates

Each finished chapter adds to the model. Episode eighty still has access to the facts from episode one.

What a narrative world model actually is

A Narrative World Model is the memory that keeps a story true to itself- who is alive, what they know, what the plot has promised, and which places exist. Unlike a static story bible, Sherpa builds this model from the chapters you write, continuously updating it as your story evolves.

  • Tracks characters, places, and history as they appear on the page
  • Updates itself with every new chapter, unlike a static document
  • Holds the promises the plot has already made to the reader

Why an AI Story writing partner needs one

The longer the story, the easier it is for details to drift. A forgotten sister. A city that suddenly has a different name. Sherpa remembers the world you've built and checks every new chapter against it, catching contradictions before readers do.

  • Catches the sister who was never mentioned as an only child
  • Notices a city that changed name without anyone deciding it should
  • Flags the clash before it becomes a fact you then have to live with

Consistency across a whole season

The model grows with your story. Every chapter adds to the world, keeping it ready for what comes next. Return to chapter forty knowing chapter one still holds true. No separate worldbuilding tool to maintain as the story itself is the source of truth.

  • Come back to chapter forty knowing chapter one is still true
  • No separate worldbuilding tool to keep in sync with the draft
  • Episode eighty can still use a detail from episode one

Who this is for

Long serialized stories

A season with dozens of episodes needs memory the writer cannot hold alone. The model is that memory.

A large cast

Once you have more people, places, and promises than you can keep in your head, contradictions start writing themselves.

A story you left and came back to

Months later, chapter one is still true. The model is how you find that out without rereading the whole season.

Frequently asked questions

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