ArcKeep

ArcKeep by FictionFlare is a writing app for long serialized fiction: web novels with hundreds of chapters. Its assistant, Arc, keeps your story's memory so you don't have to: who everyone is, where things happened, which promises to readers are still open, and what happened in every chapter.

• Story memory. After each chapter, Arc writes a summary and updates the story bible (characters, places, factions, items, power systems), the plot threads and the timeline.
• Draft the next chapter from your own beats, in your voice (Arc can learn it from your chapters or a book you love: technique only, never its words).
• Continuity checks against everything you wrote before: names, injuries, travel times, who knows what, power rules, forgotten promises.
• An editorial team for any chapter: a developmental editor, a line editor, test readers and a devil's advocate, in one letter.
• Write it with me: plan a chapter as scenes and write it together, one scene at a time.
• Send to FictionFlare: new and changed chapters go to your FictionFlare book as drafts. You publish them there.
• Export to EPUB, Word or one Markdown file.

What you need

• VS Code (free).
• Claude Code, Anthropic's official extension, signed in with your own Claude plan. Arc works through it; ArcKeep never sees your Claude account. ArcKeep offers to install it the first time.
• Python 3 on your computer (for Arc's helper scripts).
• A FictionFlare author account. ArcKeep is free for FictionFlare authors and invite-only for now: sign in from ArcKeep and ask for access, and we'll email you when you're in.

Getting started

1. Open an empty folder for a new story (or the folder of a story you already have) and click the ArcKeep icon in the Activity Bar.
2. Choose Sign in to FictionFlare, then accept the one-time offer to set up Claude Code.
3. Click Start a new story, or Bring in my existing story for chapters you already wrote (Word, text, Markdown or ebook).

Each button opens Arc's chat with your request ready; press Enter to run it. Shortcuts: Recap Ctrl/Cmd+Alt+R, Draft next Ctrl/Cmd+Alt+N, Chapter done Ctrl/Cmd+Alt+D, Check Ctrl/Cmd+Alt+K, Focus mode Ctrl/Cmd+Alt+F.

Your story stays yours

Everything stays in your story folder as plain files you own. ArcKeep keeps that folder tidy by hiding its own working files from VS Code's file list and from Windows File Explorer / macOS Finder; ArcKeep: Show or Hide Story Files shows them again, and nothing is ever deleted. Arc reads your story through Claude Code under your own Claude account. Only when you press Send to FictionFlare are chapter titles and text sent to your FictionFlare book, never your notes or story memory.

Updating ArcKeep

Updates install by themselves. If a new version needs anything in your story changed, ArcKeep does it when the story opens, never touches your chapters, tells you what it did and offers Undo. Anything that needs Arc appears as a card on Home for you to run when you're ready.

Terms

ArcKeep Terms of Use · FictionFlare Privacy Policy · About ArcKeep · Help: support@audiflo.app

Copyright (c) 2026 AudiFlo. All rights reserved. ArcKeep is free to use, but it is not open source: you may install and use it for your own writing, including books you publish or sell, but not copy, modify, redistribute, reverse engineer or reuse any part of it. Everything you write with ArcKeep belongs to you. The full terms are in the LICENSE file that comes with the extension.