u/javrenn

I’ve been working on LLM/agent security for a while now, mostly around prompt injection, jailbreaks, leaks, tool abuse, and where the actual security boundary sits once a model starts using tools.

Getting accepted into Anthropic’s Cyber Verification Program gave me a bit more room to push that work further, and I’ve been gradually turning it into Plimsoll.

It’s an open-source agent skill for red-teaming LLM apps and agents.

I’ve been working on LLM/agent security for a while now, mostly around prompt injection, jailbreaks, leaks, tool abuse, and where the actual security boundary sits once a model starts using tools.

Getting accepted into Anthropic’s Cyber Verification Program gave me a bit more room to push that work further, and I’ve been gradually turning it into Plimsoll.

It’s an open-source agent skill for red-teaming LLM apps and agents.

https://github.com/lumiboi/plimsoll

i deleted my earlier post because yeah, it sounded too ai/slop. fair criticism tbh. english is not my first language, so i used ai/translation to explain the project better, but it made the whole thing sound fake and too polished. my bad.

so i’ll try to explain it myself this time. so, pardon the wording...

i like tracking what i read. i like ratings, reviews, shelves, seeing what other people are reading, making lists, all that stuff. but goodreads always feels weird for me to use. not because the idea is bad, actually the idea is great, but the app/site feels old, messy and not really social enough for something that supposed to be about taste.

so i started building my own book tracking app.

it’s called Cilt (NOT CLIT!!!!!!!!) for now:
https://cilt.app/

the basic idea is kind of “letterboxd for books”, but i know that sentence is overused as hell. what i mean is, i want logging books to feel simple and a bit fun, and after some time your profile should feel like an archive of your reading taste, not just random database list.

right now / planned features are:

- log the books you read

-rate and review them

-make shelves like reading, want to read, favorites etc.

-create public lists

-follow other readers

-see what people with similar taste are reading

-discover books from reviews/lists, not only generic ratings

-track reading goals and stats

-search books by title, author, isbn, publisher

-have a profile that feels more personal

i know there are already apps for this. i’m not saying i invented the wheel or anything. my problem is most alternatives either feels too old, too plain, or they don’t really have the social/taste part that makes letterboxd or even steam fun.

also fyi: i didn’t use vibe coding for the whole project. i used it mostly on the frontend side, and when i use it i prefer to say it openly.

it’s still very early, so feedback would be really useful. especially from people who still use goodreads even they hate it, or people who tried storygraph/fable/other apps and didn’t stick with them.

I love tracking what I read, but every time I open Goodreads I feel like I’m using something that got frozen in time 10 years ago.

The idea is great: reviews, shelves, ratings, friends, discovery. But the actual experience feels slow, cluttered, and weirdly unsocial for something that should be built around taste and conversation.

So I started building my own version: basically a Letterboxd-style place for books.

The project is called Cilt for now. The goal is simple: make reading feel easier to track, more beautiful to look back on, and more social without turning it into another noisy feed.

You can take a look ---> https://cilt.app/ <---

Alright, I know, I know it looks like clit. But it’s not!!! It actually means ‘skin/leather’ in Turkish/Arabic, that’s the whole book connection. Anyway, let’s just look at it from a marketing angle LOL.

Some of the main things I’m building:

• Log books as you read them, almost like a reading diary
• Write short or long reviews after finishing a book
• Create shelves like “reading”, “want to read”, “favorites”, etc.
• Build public lists, like “weekend reads”, “modern classics”, “books that ruined me emotionally”
• Follow other readers and see what they’re reading, reviewing, and saving
• Discover books through people with similar taste, not just generic ratings
• See trending books, popular lists, and recent reviews
• Track reading goals, streaks, formats, genres, and reading stats over time
• Search by title, author, ISBN, or publisher
• Have a profile that actually feels like a personal reading identity, not a database entry

What I always liked about Letterboxd is that it makes logging a movie feel small and fun, but over time your profile becomes this surprisingly personal archive of your taste. I want that same feeling for books.

I know there are already book tracking apps out there, but most of them either feel too utilitarian, too old, or not social enough. I’m trying to build something that sits in the middle: clean tracking, strong discovery, and a real social layer around reviews, lists, and reading habits.

It’s still early, so I’d genuinely love feedback from people who read a lot, use Goodreads despite hating it, or have tried alternatives and bounced off them.

What would a “Letterboxd for books” need to have for you to actually use it?

https://preview.redd.it/me5b17p41k5h1.png?width=2541&format=png&auto=webp&s=df62fed608dc521c8e367dd7b579cc4b205291f6

https://preview.redd.it/qwz2jh291k5h1.png?width=2538&format=png&auto=webp&s=a641792e4dd8257604da86768f6d4d0431e823a5

https://preview.redd.it/doa6ok0d1k5h1.png?width=2542&format=png&auto=webp&s=c2eb9fec90482cdf4e64478e7fd9b8486cb23614

https://preview.redd.it/dpe17fbl1k5h1.png?width=2542&format=png&auto=webp&s=bf4c65b7d4f424b90270db0676f54d2749e78406

Selamlar, umarım bu paylaşımla birlikte bir kuralı ihlal etmiyorumdur.

Film tarafında Letterboxd gibi uygulamalar sayesinde izlediğimiz şeyleri kaydetmek, yorumlamak, liste yapmak ve başkalarının ne izlediğini görmek bayağı keyifli hale geldi. Ama kitap tarafında benzer bir hissi veren, özellikle Türkçe kullanıcıya yakın duran bir platform bulmak zor.

Goodreads yıllardır var ama arayüzü eski, kullanımı karışık ve sosyal tarafı bana hiç doğal gelmiyor. Ben de “kitaplar için daha sade, daha sosyal, daha keyifli bir günlük/keşif alanı nasıl olur?” diye düşünerek Cilt’i geliştirmeye başladım.

Site: https://cilt.app

Şu an temel olarak şunlar var:

Okuma günlüğü
Okuduğun kitapları kaydedebiliyor, okuma tarihlerini girebiliyor, puan verip inceleme yazabiliyorsun.

Baskı/kapak seçimi
Kitabın farklı baskıları veya kapakları varsa, kendi okuduğun/sahip olduğun versiyonu seçebiliyorsun.

Listeler
Kendi kitap listelerini oluşturabiliyorsun. Mesela “beni mahveden kitaplar”, “herkese önerdiğim bilimkurgu kitapları”, “yarım bırakıp sonra döndüklerim” gibi.

İstatistikler
Yıl içinde kaç kitap okudun, kaç sayfa okudun, hangi türlere daha çok yöneldin gibi şeyleri takip edebiliyorsun.

Sosyal taraf
İnsanları takip edebiliyor, incelemeleri görebiliyor, beğenebiliyor ve topluluğun ne okuduğunu daha sakin bir akışta takip edebiliyorsun.

Benim asıl yapmak istediğim şey sadece “kitap ekleme sitesi” yapmak değil. Letterboxd’da ya da Steam’de sevdiğimiz o sosyal hissi kitap tarafına daha düzgün taşımak istiyorum. Kitap okuyan insanların birbirini keşfedebildiği, listelerle ve yorumlarla platformun kendi kültürünü oluşturabildiği bir yer olsun istiyorum.

Şunu da baştan söyleyeyim: Daha geliştirme sürecinin çok başındayım. “Her şey mükemmel olsun da öyle paylaşayım” diye beklemek istemedim, çünkü gerçek kullanıcıdan feedback almadan bazı şeylerin doğru gelişeceğine inanmıyorum. O yüzden eksikler, bug’lar, garip çalışan yerler kesinlikle olabilir.

Özellikle şunları merak ediyorum:

İlk bakışta site ne hissettiriyor?
Goodreads yerine veya yanında kullanır mıydınız?
Kitap odaklı böyle bir platformda sizin için olmazsa olmaz ne olurdu?
Eksik, gereksiz veya kafa karıştıran bir şey var mı?

Her türlü geri bildirime açığım.

Hey everyone,

Like most of you here, I use Letterboxd to log obsessively every movie I watch. But when it comes to books, the current options (looking at you, Goodreads) are incredibly outdated, cluttered with ads, and just painful to use.

I wanted that exact Letterboxd experience but for reading. So, I built >>> cilt.app.

Alright, I know, I know it looks like clit. But it’s not!!! It actually means ‘skin/leather’ in Turkish/Arabic, that’s the whole book connection. Anyway, let’s just look at it from a marketing angle lol.

-The Diary: Log the dates you read a book, pick the exact edition/cover you own, drop a rating (half-heart included), and write your review.

-Custom Lists: Build lists exactly like you do here (e.g., "Books that caused an existential crisis", "Sci-fi that actually makes sense").

-Reading Stats: Track your reading habits, total page counts, and top genres over the year.

-Social & Reviews: Follow friends, like reviews, and see what the community is reading without a noisy, algorithmic feed.

Similar apps generally lack, or have a very limited sense of, the social feel that we find and love on Letterboxd or even Steam. UI/UX is a whole other topic. What I want to achieve at this stage is to nail these aspects. I have plans for the future, but it's just too early right now.

FYI: I am at the very beginning of the development process. I was way too impatient to wait for a "perfect" 1.0 release, so I shipped it while I'm still building. This means you will absolutely run into bugs and errors. I'm open to feedbacks.