Here's the exact tools I've used to write 30 books in 1 year.
EPUB production, GitHub backups, and publishing tools — all inside OpenCode.
EPUB production, GitHub backups, and publishing tools — all inside OpenCode.
Go to georgesaoulidis.com/opencodedownload.
On that page, look for "OpenCode Desktop (Beta)". Click the Download button for your computer:
• Windows → click "Windows (x64)" Download
• Mac → click "macOS (Apple Silicon)" or "macOS (Intel)" Download
• Linux → click "Linux (.deb)" or "Linux (.rpm)" Download
Run the installer you just downloaded. OpenCode will open when it's done.
The EPUB tools need Calibre. Download and install it from calibre-ebook.com/download. Pick the version for your operating system.
Click the big green button below to download a small file called opencode.json.
Your browser will save a file called opencode.json to your Downloads folder.
Take the opencode.json file from your Downloads folder and move it into your book's folder (the one where you keep your manuscript chapters).
If you don't have a book folder yet, create a new empty folder anywhere on your computer and put the file there.
Important: Make a backup of your work first. Only work in a fresh directory with copied files.
Open OpenCode (the app you installed in Step 1). It will ask you to point it to a folder. Choose the book folder where you put the opencode.json file.
That's it. Tomos is installed. You can ask OpenCode to create an EPUB, back up your book, or help with publishing.
Drop your KDP export files to see your sales dashboard with charts, book rankings, and ad ROI. Open dashboard →
Tell it to create an EPUB from your chapter files. It builds the book with proper metadata, cover, and table of contents. Ready to upload.
Produces EPUBs that pass Smashwords Premium Catalog requirements. No rejections.
Tell it to back up your book. It creates a git repo, commits everything, and pushes to GitHub. One sentence.
Coming soon.
OpenCode is an AI coding agent. You talk to it in plain English. Tomos gives it the ability to handle book production tasks. You don't click through menus or learn software — you just tell it what you want.
OpenCode is blazing fast. With one of the frontier models like DeepSeek V4 Flash you will not believe how fast you can write.
The same setup that produced 30 books. Free. Open source. Your own API keys.
Get help, share workflows, and connect with other authors using AI writing tools.