Narrative arc prompt builder
Large language models are capable storytellers, but without a structural blueprint they tend to produce flat, episodic text — events happen, but tension never builds and the ending feels arbitrary. The narrative arc prompt builder generates a prompt that hands the model a proven story structure, complete with named beats, turning points, a character arc, and a thematic throughline. Everything runs in your browser, no API key needed.
How it works
You provide a story concept, an optional protagonist and theme, pick a structure, and set a length. The builder then assembles a prompt that:
- Names each beat of the chosen structure (e.g. setup → inciting incident → midpoint → climax → resolution for three-act).
- Asks for a deliberate character arc — where the protagonist starts emotionally and where they end.
- Plants turning points at the right positions so tension rises and breaks.
- Threads the theme through scenes so the story means something rather than just happening.
- Paces the beats against your target length.
Tips and examples
For genre fiction, the hero’s journey maps cleanly onto fantasy and adventure; the ordinary world, call to adventure, ordeal, and return give the model strong scaffolding. For literary or dramatic pieces, Freytag’s pyramid keeps the climax central. Set a short length first to get a tight outline, confirm the arc works, then re-prompt for full prose with the same structure. Always give the model a theme — “the cost of ambition,” “found family,” “memory and loss” — because it is the single biggest lever on coherence across a long narrative.