Claude Mythos
Character system + world bible + arc tracking for novels, screenplays, games, interactive fiction — built on top of Claude Fable 5.
What is Mythos?
Claude Mythos is a character + story + worldbuilding framework built on Claude Fable 5 for creative writers. "Mythos" comes from Greek — tale, myth, narrative. The system stays true to the name: each character is a separate personality agent, each world a structured lore book, each scene a multi-agent coordination.
Problem it solves: In plain AI, after 50 pages your character forgets eye color, motivation. After 100 pages world rules contradict. In Mythos everything is structured: character files + lore book + timeline + relationship map in Pinecone. Each scene pulls relevant context — consistency holds beyond 200K words.
For whom? Novelists (any genre), screenwriters (film/TV), game designers (RPG NPCs + main story), interactive fiction devs (Twine, Inkle), animators, comic writers. Overkill for short-form — Mythos was built for long-form projects.
Mythos's 6 Core Components
Character Cards
Each character a separate file: name, age, physical, personality (Big 5), motivation, fears, history, voice, verbal tics, relationships. Stored as embeddings in Pinecone.
World Lore Book
Geography, history, mythology, tech, economy, politics, cultures, languages, wars — all structured. Only relevant slices pulled per scene.
Arc Tracking
Save the Cat, Hero's Journey, or free-form. Each character's arc + main story arc. Dashboard shows current beat.
Scene Generation Agent
Not 'write this scene' — character A + character B + location + goal + mood → Mythos 'casts' relevant characters, produces coherent dialogue.
Relationship Map
Dynamics between characters: A loves B, B avoids A, C watches both. Evolves over time. Graph structure.
Memory & Continuity
After each scene characters 'evolve': new info learned, relationships shift, motivations update. Carries to next scene.
5-step setup with code samples — Notion character template, world lore, Pinecone vector memory, scene generation agent, scene log + character updates.
View Full Setup (TR)Video Walkthroughs
Claude Mythos — Story System
Character and world design with Mythos engine
Creative Writing with Claude
Practical novel/screenplay workflows
Multi-Agent Story Generation
Coordinating multiple character agents
Frequently Asked Questions
What is Claude Mythos?▾
Claude Mythos is a character + story + worldbuilding framework built on top of Claude (especially Fable 5) for creative writers. Character cards, world lore book, arc tracking, multi-character scene generation via structured prompts + agent system. For novels, screenplays, games, interactive fiction.
How is Mythos different from plain ChatGPT/Claude?▾
In plain AI chat, characters become inconsistent (forgets eye color after 50 pages). In Mythos each character is a separate agent: personality, motivation, history, voice, relationship map stored. Stays consistent even after 200K+ words. World lore book in Pinecone, pulled per scene.
What formats is Mythos suited for?▾
All long-form creative content: novels (any genre), screenplays (film/TV/web series), theatre, video games (RPG NPCs, main story), interactive fiction (Twine, Inkle), animation, comics. Overkill for short-form — basic prompts suffice there.
What do I need to set up Mythos?▾
1) Anthropic API + Fable 5 access, 2) Pinecone or Qdrant (vector memory), 3) Notion or similar for documentation, 4) Optional: n8n (auto scene triggers). Basic setup 2 days, advanced 1 week. Practical templates on this page.
Does Mythos 'steal' my characters/world?▾
No. Using the API, your data isn't used for Anthropic's training (Zero Data Retention). Your characters are yours. Pinecone/Notion in your own account. Mythos is just a workflow reading your data to produce coherent content — IP stays with you.