People + Claude
World and manuscript
We define a series bible—characters, visual rules, reading level, recurring rituals, and safety boundaries—then draft and critique each chapter against it.
Inside our small family studio
MoonFable is not an infinite story generator. It is a fixed, downloadable library built with generative tools, independent quality checks, and a real-person approval gate before anything reaches a child.
The premise
Generative tools made a story library possible for a small family team. They did not make judgment optional. Models can draft, render, compare, and narrate. People decide the worlds, set the rules, reject failures, revise the work, and take responsibility for what is published.
The result sits between two familiar models: it has the freshness of generative media, but the predictable experience of a traditional book. The story a parent previews is the same story a child receives.
From idea to bedtime
Every stage leaves an artifact we can inspect, revise, or reproduce.
People + Claude
We define a series bible—characters, visual rules, reading level, recurring rituals, and safety boundaries—then draft and critique each chapter against it.
Human gate
A person reviews the actual pages for warmth, coherence, age fit, cultural care, and anything a rubric cannot understand. A failed chapter goes back; it does not continue automatically.
Gemini on Vertex AI
Series character sheets and scene-specific briefs guide each image. Generation is paced, retryable, and stored with model provenance so a scene can be regenerated without rebuilding the whole book.
Claude vision + people
Images are checked against the brief for missing or duplicated characters, continuity, anatomy, unwanted text, scene logic, style, and fear level. People make the final call.
ElevenLabs
Stable voices carry a series across chapters. Word-level timestamps map the narration to each page so pre-readers can follow along while the story turns itself.
Human gate + fixed files
Approved text, images, audio, and timings become a versioned story bundle. The app downloads that bundle for offline use. There is no model call while a child is reading.
A real correction
Image models sometimes invent readable labels even when the brief explicitly prohibits text. This scene was held back and repaired before publication.
A real manuscript correction
In The Machine from the Sea, a draft described “three children’s hearts” even though the scene contained two children and one twenty-year-old adult. The fresh-context review marked the chapter revise. Publication changed the line to “two children’s hearts.”
The boundary
The finished experience
A complete six-minute story from the same fixed catalog. The podcast is free and ad-free; the app pairs this narration with illustrated, automatically turning pages.
For builders and curious parents
We are continuing to document what works, what fails, and where human judgment matters most. For technical questions, demonstrations, or collaboration, write to hello@moonfable.us.