[GUI Plugin] Open in Resage - Send books from Calibre to Resage on macOS

[mingleidev]

Hi everyone,

I wrote a small GUI plugin for calibre on macOS called Open in Resage.

It adds a toolbar button and context menu item to send selected books directly from your calibre library into Resage (a reading companion for macOS).

What it does:
- One click to send single or multiple selected books (up to 20 at once)
- Automatically picks the best available format in priority order: EPUB, AZW3, MOBI, PDF, DOCX, TXT, MD
- Passes the local file path directly without copying files to temp folders
- Lightweight bridge with no background tracking or intrusive sidebars inside calibre

Requirements:
- macOS
- calibre 6.0 or newer
- Resage 1.0.5 or newer

Supported formats:
.epub, .azw3, .mobi, .pdf, .docx, .txt, .md
Note: DRM-protected books cannot be opened. The plugin does not remove or bypass DRM.

Installation:
1. Download open_in_resage.zip attached below or from GitHub Releases.
2. In calibre, go to Preferences -> Advanced -> Plugins -> Load plugin from file.
3. Select open_in_resage.zip and restart calibre.

Source code and issue tracker:
https://github.com/mingleidev/calibre-plugin-resage

Feedback and bug reports are welcome.

Ming