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TypeApe
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Desktop story writing tool

Write, validate, and preview structured stories.

TypeApe provides AI-assisted writing, structural validation, and local story previews in one desktop app.

Join the waitlist Choose a desktop download

Windows, macOS, and Linux available · Account access is required after download

See the workflow

The Glass Station

all paths reachable

Passage / arrival

The train that arrived yesterday

The station clock kept perfect time. Mara watched the second hand cross midnight, then heard the rails begin to sing beneath a train already covered in yesterday's rain.

Ask the conductorFollow the empty platform

Three core functions

Write, validate, and preview in one project.

  1. Draft

    Write in a real project

    Use an AI project Agent to edit story source. Every file change remains available for review.

  2. Validate

    Validate the story structure

    Check reachability, endings, and story-type rules before publishing the story.

  3. Preview

    Preview the story

    Preview the story locally, follow each decision, and annotate the exact passage to revise.

Technology used in Engram production

TypeApe applies Engram's narrative production methods to desktop story writing.

Engram's production team used Lattice AI to manage branches and validate causality, character knowledge, and path completion. TypeApe makes these functions available in a desktop writing tool that does not require game-writing or engineering experience.

The vibrant geometric cityscape of Engram's game worldCharacters from Engram gathered in a vivid science-fiction scene
Engram · AI-driven narrative CRPG
Engram / Lattice AI / TypeApe

  1. Game

    Engram

    An AI-driven narrative CRPG with branching dialogue, decisions, and persistent story state.

  2. Production system

    Lattice AI

    Production tools for managing branches, causality, and character knowledge.

  3. Writing tool

    TypeApe

    A desktop writing tool that applies the same branch management and validation methods.

Editing control

Story projects keep prose, source files, validation results, and previews together.
Every generated suggestion is shown as a file change that you can review and accept.

Desktop builds

Download TypeApe for your desktop.

Release v0.5.2