Agentic writing software built for long-form fiction

Talk your ideas into a compelling book.

From a story idea to an outline, characters, and each chapter, develop your novel with Mozi. Import an existing manuscript to keep writing, or direct changes to dialogue, style, and plot. Available for macOS and Windows.

Continue Chapter 9

Worked for 2m 41s

Chapter 9, “Whales Through the Morning Mist,” is ready. Lumi crosses the dawn mist on Miro’s back, discovers luminous forests carried by migrating cloud whales, and learns that her mother’s sky seed can wake an ancient route. At the end, the lead whale speaks her name in her mother’s voice.

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Chapter 9 Whales Through the Morning Mist
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Chapter 9

Chapter 9 Whales Through the Morning Mist

The mist lay below them, not ahead.

When Lumi stepped onto Miro’s back, dawn was opening in quiet layers across the east. Silver-blue fur covered the cloud whale’s broad spine, and every breath sent pale markings through it like light under water. She had expected him to pitch like a ship. Instead he rose with the solemn ease of a mountain remembering it could fly.

“Not the fin,” Miro rumbled beneath her boots. “I’m ticklish.” Lumi laughed, loosened her grip, and caught the brass ring on the saddle. The map case at her hip tapped softly against it. Her mother’s unfinished chart had been blank for seven years, yet since the sky seed woke, a gold line appeared along its edge at every sunrise.

Miro entered the mist. The world became white and wet. Lumi closed her eyes and listened: pine resin in one current, rain in another, and a third wind sweet as ripe pears. She looked up into that sweetness just as an enormous shadow kindled inside the fog.

The first migrating whale passed over them with a forest on its back. Roots braided across its spine; glassy leaves cupped the new sun; long vines poured from its flanks like green waterfalls. Birds nested in the moving canopy and shook loose golden seed-fluff as they went. A second whale emerged, then a third, until the mist seemed to return a whole constellation to the day.

Lumi forgot to breathe. She had studied every marvel printed on a navigator’s chart, but none had told her that a forest could choose a horizon.

Miro called to the herd. One by one the whales answered, their voices warm inside Lumi’s ribs. The sky seed lifted itself from her pouch. A green star map turned within its pearl-white shell, and thousands of leaves across the herd tilted toward it. Their light traveled forward to an ancient white whale with branchlike horns and a rootless garden suspended between them.

“The pathfinder,” Miro said. “She remembers every island the sky has lost.”

The white whale looked back. Lumi’s unfinished chart slid from its case and opened in the wind. Gold lines raced over the empty paper, threading between storms and forbidden air, then stopped beside an island that had never existed on any map: Dawnshore.

The ink dimmed as she read the name. “It will not survive a second sunrise,” the pathfinder said directly into her thoughts.

“How do I save it?” Lumi called.

The whale’s garden burst into bloom. Tiny bright flowers turned toward Lumi, each holding an eye instead of pollen. They lifted the seed’s green glow and laid it across the cloud sea as a road north. Then the pathfinder spoke Lumi’s name with her missing mother’s exact voice: the quick cadence, the soft final breath, even the smile hidden at the end.

Lumi stood against the brass ring. The wind carried her tears away before they could fall. Ahead, the mist opened along a gold seam, revealing an island already turning transparent. Miro did not ask whether she was afraid. He lowered his fins and dived toward Dawnshore with Lumi and the shining seed.

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From novel outline to chapter drafts

You keep imagining. Mozi keeps writing, page after page.

Explore story ideas with Mozi, develop your characters, world, and novel outline, then write one chapter at a time.

Can I import a half-finished novel and continue writing it?
  1. 01

    Share the idea

    "A story where memories can be traded." One sentence is enough.

  2. 02

    Plan characters and outline

    Moziflow helps you develop characters, build your world, and plan your novel’s outline and chapters. You approve the direction and any high-cost action.

  3. 03

    Draft and review chapters

    Agents take turns drafting, reviewing, and refining each chapter. Your work stays in your local workspace. Always yours.

Characters, worlds, and plot threads grow with your story.

Mozi remembers every love, every lie, and every loose end.

Mozi draws on the Creative Archive and chapter memory to reference character relationships, worldbuilding, story progress, and unresolved plot threads. This helps later chapters build on earlier ones and reduces continuity errors as your novel grows.

Will Mozi forget characters and earlier plot developments as the book gets longer?

From imagination to creation

Not just able to write, but able to write well.

Work with Mozi on your novel’s opening, character dialogue, and pacing. Specify the point of view, prose style, and changes you want to give characters distinct voices and make conflict, suspense, and foreshadowing fit your story.

Refine openings and chapter endings

Openings grab, endings hook, setups feel natural, twists land cleanly, and the prose shows real literary skill.

Give characters distinct voices

You know who is speaking from the first line. Each has their own desires, weaknesses, and private agenda.

Develop conflict, suspense, and foreshadowing

Conflict, suspense, setup, and payoff. A good story keeps readers riding every rise and fall.

Polish and rewrite your novel. You decide what changes.

Change anything you like. See every edit at a glance. Keep it or leave it. Your call.

From polishing a line of dialogue to rewriting a scene, tell Mozi what you want to change. Compare the original and revised text, then accept or discard each change. Your original stays intact until you approve.

Knowledge is no barrier

You don’t need to be a scientist to write hard sci-fi.

Let your imagination run wild. How would the ship fly? Could the machine be built? How would the drug work? Could the chemistry spiral out of control? Does the history hold up? Mozi checks it all for you. You can write hard sci-fi too.

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Language is no barrier

Write in your language.

Long-form writing should not be limited by language. Mozi writes in 16 languages, each with its own writing rules and review standards.

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From your first book to every book that follows.

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Hand off the tedious parts. Keep every judgment call.

Before you start, you might ask.

Read all FAQs
What is Moziflow, and who is it for?

Moziflow is an agentic desktop writing app for long-form creators writing and editing fiction, novels, web novels, serialized stories, and other book projects. You can work with Mozi, your agentic writing assistant, to discuss stories, organize characters and worldbuilding, plan chapters, and move forward with drafting and revisions.

It is designed for new writers preparing to start, as well as writers who need to keep track of story details, develop a long-form work, or continue a book you've already started. You always decide where the story goes and what makes it into the final version.

Please note: Moziflow is an agentic writing app and does not include any model usage allowance. You need to configure your own model service, and model usage is billed by your chosen provider.

How is Moziflow different from using chat tools such as ChatGPT or Claude directly?

Long-form writing quality = Model capability × Context orchestration × Work-in-progress state management × Staged production × Independent editorial review × Version control

Chat-based AI tools such as ChatGPT and Claude primarily provide the first element, model capability, along with some context-handling capabilities. Users must manage the remaining aspects manually, which is cumbersome. As a manuscript grows, more context needs to be maintained. That growing context can, in turn, increase the risk of model hallucinations, creating a vicious cycle.

Moziflow uses a Harness framework, multiple specialized AI writing agents, and a complete system built specifically for writing to support sustained work on a single book. The agents draw on the current book’s Creative Archive and memory to plan, write, and revise, while building long-term memory to keep long-form writing on track and the context concise. Moziflow provides a system-level solution, rather than simply guiding a model with prompts, skills, and context. This is the core distinction between Moziflow and chat-based AI tools or conventional AI writing products.

Please note: Moziflow is an AI writing agent application. You need to configure your model in the app using an API key before you can chat with Mozi and work on your writing.

I've never used a writing agent. How do I start my first book?

Download and install Moziflow, choose a local workspace where your work will be saved, sign in, and configure your model. Then simply tell Mozi about the story you want to write. If you have already started a book, you can import it into the app and continue writing.

Which devices are supported? Can I write directly on the website or on my phone?

Moziflow currently supports macOS and Windows devices.

Visit the download page for installers and platform options.

Can I write in languages other than English?

Yes. Supported book languages include English, French, German, Spanish, Portuguese, Arabic, Hindi, Vietnamese, Thai, Japanese, Korean, Simplified Chinese, Traditional Chinese, and more.

There is no agony like bearing an untold story inside you.

—— Zora Neale Hurston

Download Moziflow for macOS or Windows, configure your model service, and go from planning your outline to writing chapter one.