Codex Reader: A Native iOS App for My Library

Codex Reader is live on the App Store today. It’s a native iPhone and iPad app for reading a Codex library: comics, manga and ebooks, from your own server, online or offline. Home, library, series, the comic reader, and reading stats. All screenshots use the app’s built-in demo library. Why build a native app at all Codex has a Komga-compatible API, so I’d been reading on iOS with Komic, a good Komga client. Codex also has its own web app, which installs as a PWA. ...

October 15, 2026 · 3 min · 503 words · Sylvain Cau

Tsundoku Update: Closing the Loop with Codex

Since I introduced Tsundoku in June, most of what changed is small, but one thing is worth a post: Tsundoku and Codex now talk to each other in both directions. Codex and Tsundoku, both ways In June the integration went one way. Tsundoku read Codex’s series index (read-only, with an API key) so it could mark which series I already own and focus on the ones I don’t. Now it goes the other way too. ...

September 30, 2026 · 2 min · 353 words · Sylvain Cau

Building Tsundoku: Turning a Firehose of Manga Releases into a Browsable Backlog

積ん読 (tsundoku) is the Japanese word for the habit of acquiring books and letting them pile up unread. It’s an affectionate kind of self-deprecation, and it’s an uncomfortably accurate description of how I read manga. There’s always a new series I’ve heard is good, a sequel that just got a fresh volume, a thing someone mentioned in passing that I meant to look into. The pile only grows. A few months ago I wrote about Codex, the Rust digital library server I built to manage the comics, manga, and ebooks I already own. Codex is great at the “own” part. It scans my files, fetches metadata, tracks what I have. But it has nothing to say about the part that actually feeds the collection: discovery. What’s new? What got a new volume since I last looked? What have I been meaning to start but never got around to? ...

June 4, 2026 · 13 min · 2736 words · Sylvain Cau