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ChapterFlow: Interactive Chapter-Structure Template Plugin for Scrivener & Google Docs

A Scrivener plugin (+ Google Docs add-on) that authors install in their writing software. As they write, the plugin tracks chapter length, scene count, and pacing metrics in real-time and compares them against genre-specific benchmarks embedded in the template. It flags chapters that deviate significantly (e.g., 'This chapter is 2,100 words; mystery chapters typically run 3,500–5,200; consider combining with next scene or expanding') and suggests structural fixes (split into 2 chapters, merge with previous, add subplot). Authors export a pacing report at the end.

PLUGIN

25 weeks • 70% confidence

Value Proposition

Catches pacing problems *during* writing, not after, saving weeks of revision. Embedded genre templates mean no need to hire an editor or buy a course; the tool is always available and learns the author's style over time. One-time purchase beats subscription fatigue.

Target Audience

Active fiction writers using Scrivener (primary) or Google Docs; self-publishers and authors in revision who want real-time guidance during drafting, not post-hoc analysis.

Key Features

  • Genre-selector (romance, mystery, sci-fi, fantasy, literary fiction) that loads genre-specific chapter-length benchmarks
  • Real-time chapter metrics: word count, scene count, dialogue %, description %, action %
  • Visual pacing dashboard: color-coded bars showing each chapter's length vs. genre norm (green = optimal, yellow = slightly short/long, red = outlier)
  • And more, with full implementation detail...

Tech Stack

Scrivener SDK (Cocoa, macOS development) Google Apps Script (JavaScript-based, for Docs add-on) OpenAI API (GPT-4 for suggestion generation) JSON (benchmark data storage)
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Original Problem

Authors struggle to find the optimal chapter length for their manuscript without clear guidelines

Writers lack concrete, actionable guidance on chapter structure and length, forcing them to make arbitrary decisions that may hurt pacing, reader engagement, and publication prospects. Current solutions offer conflicting advice or generic rules-of-thumb that don't account for genre, audience, or narrative style, leaving authors uncertain and requiring extensive trial-and-error revision.

Score: 17.5%