Project Idea / REA Challenge: Cross-Platform Open-Source Alternative to HelpNDoc (Lightweight HAT for Linux/Windows/macOS)

[celiohermoso]

Hi everyone! I am a non-programmer with an older PC, and I’m amazed by what the REA project and Claude Code can do. I would like to propose a community challenge: cloning or creating an open-source alternative to HelpNDoc.
What is HelpNDoc?
It is a desktop WYSIWYG text editor focused on HAT (Help Authoring Tool). The main goal is single-source publishing: you write a manual, guide, or documentation once, and the software automatically exports it to multiple formats.
Key features to replicate:
• A clean, lightweight WYSIWYG text editor.
• A table of contents (TOC) manager on the side.
• Single-source compilation to multiple formats: HTML (Web Help), PDF, ePub, Kindle, Word (DOCX), and CHM.
Crucial Requirements for this Challenge:

1. Cross-Platform (Linux Support): HelpNDoc is notoriously Windows-only. The Linux community has been craving a modern, single-source HAT tool for a long time. This clone needs to run flawlessly on Linux, Windows, and macOS.
2. Ultra-Lightweight for Older Hardware: The original software can become heavy. This community version should be optimized to run smoothly on low-end, older computers without hogging RAM or CPU.
   Why this is highly beneficial for the community:
   • Great REA Test Case: Replicating a WYSIWYG editor and its document-parsing/compilation engine using MCP and Claude Code would be an incredible demonstration of REA’s reverse-engineering and code-generation capabilities.
   • Filling a Gap in Linux: There is a huge lack of modern, lightweight, and completely free open-source HAT tools for technical writers, indie developers, and students on Linux.
   Would anyone in the REA community be interested in taking this on as a benchmark project or case study? I can provide detailed descriptions of the user experience and interface behavior if needed!
   Tenks!!!