Hacker News: langtang1996

Show HN: FlashQwen – A from-scratch CUDA inference engine for Qwen3

langtang1996 — Tue, 16 Jun 2026 05:39:36 +0000

Article URL: https://github.com/frankkk96

Comments URL: https://news.ycombinator.com/item?id=48551028

Points: 5

# Comments: 0

New comment by langtang1996 in "Show HN: StackSense – AI/data/systems engineering knowledge graph"

langtang1996 — Thu, 07 May 2026 15:37:15 +0000

If you need other languages, please send me a message and I’ll translate it for you

Show HN: StackSense – AI/data/systems engineering knowledge graph

langtang1996 — Thu, 07 May 2026 05:52:51 +0000

Article URL: https://www.stacksense.cc/

Comments URL: https://news.ycombinator.com/item?id=48045897

Points: 3

# Comments: 1

1B in, 20B out. Apple stays out of the war

langtang1996 — Sun, 26 Apr 2026 12:00:02 +0000

Article URL: https://alphasense.cc/signals/apple-ai/

Comments URL: https://news.ycombinator.com/item?id=47909633

Points: 1

# Comments: 1

A Private Recommendation System I Can Control

langtang1996 — Sun, 19 Apr 2026 09:20:44 +0000

Article URL: https://frankk.site/en/blog/controllable-recommendation-system/

Comments URL: https://news.ycombinator.com/item?id=47822957

Points: 2

# Comments: 0

Show HN: FeedSense – A Private Recommendation System

langtang1996 — Sat, 11 Apr 2026 17:24:00 +0000

Article URL: https://feedsense.cc

Comments URL: https://news.ycombinator.com/item?id=47732317

Points: 1

# Comments: 0

New comment by langtang1996 in "Show HN: FeedSense – A private recommendation system built from your own sources"

langtang1996 — Fri, 10 Apr 2026 16:56:10 +0000

If you want to connect, please contact me: frank@feedsense.cc

I’m looking forward to build with you!

Show HN: FeedSense – A private recommendation system built from your own sources

langtang1996 — Fri, 10 Apr 2026 14:20:26 +0000

Hi HN,

Two things inspired me to build this: Andrej Karpathy recently talked about going back to RSS feeds — "higher quality longform and a lot less slop intended to provoke" (https://x.com/karpathy/status/2018043254986703167). Around the same time, Marc Andreessen shared his information source: 25% X, 25% podcasts with practitioners, 25% conversations with AI, 25% old books (https://x.com/pmarca/status/2030949039345467570).

This made me realize how much it matters to control what you let in. But I've used to the feed-style reading habit (each social media does like this). I just don't want a random meme or rage bait to hijack my attention out of nowhere.

So I built FeedSense — a private recommendation system. You pick your sources, and it builds a "For You" feed from only those sources. The system takes content quality, publish time, and your read history into account (still tuning it), but it will never surface anything outside the sources you chose

TestFlight beta on iOS: https://testflight.apple.com/join/56VPEeeS

https://feedsense.cc

Happy to talk architecture or the recommendation approach if anyone's curious.

Comments URL: https://news.ycombinator.com/item?id=47718588

Points: 7

# Comments: 1

New comment by langtang1996 in "Ask HN: Open-source client for sending email through AWS SES?"

langtang1996 — Tue, 11 Jun 2024 14:13:09 +0000

Thanks very much, it helps a lot!

Ask HN: Open-source client for sending email through AWS SES?

langtang1996 — Sat, 08 Jun 2024 07:15:18 +0000

I'm trying to do email marketing and I have deployed AWS SES, is there any open source project or SaaS to help me send/track my emails? I have over 5000 audiences and it's expensive if I use other SaaS to send/track my emails (e.g. MailerLite)

Comments URL: https://news.ycombinator.com/item?id=40615876

Points: 1

# Comments: 2

New comment by langtang1996 in "Ask HN: What payment methods should be supported in Stripe?"

langtang1996 — Mon, 20 May 2024 07:57:00 +0000

This should be impossible because creating the checkout session needs authentication.

New comment by langtang1996 in "Ask HN: What payment methods should be supported in Stripe?"

langtang1996 — Thu, 16 May 2024 07:17:41 +0000

Thanks greg, I'll try to clarify more information on the site, your suggestions help me a lot!

New comment by langtang1996 in "Ask HN: What payment methods should be supported in Stripe?"

langtang1996 — Thu, 16 May 2024 05:01:51 +0000

Thanks bro, it's really hard to figure out why they exit the checkout page, since Stripe does not support collect reason for why exit the checkout page (only collect reason for why cancel the subscription).

Ask HN: What payment methods should be supported in Stripe?

langtang1996 — Thu, 16 May 2024 04:18:31 +0000

I developed a SaaS software, which uses Stripe for receiving money and manage subscription, however I found that many users create a checkout session, but do not complete the payment, only about 30% of the users who create a checkout session complete the checkout.

The question is: Is this proportion (about 30% finish the checkout) normal? My app is a web app and only card payment is supported now (My PayPal hasn't been approved for recurring payments). Should I support more payment methods? Are there any recommended payment methods? Or is it that my product isn’t that appealing?

Comments URL: https://news.ycombinator.com/item?id=40375155

Points: 3

# Comments: 7

New comment by langtang1996 in "Ask HN: How should I improve my product?"

langtang1996 — Thu, 16 May 2024 00:58:15 +0000

Thanks bro, this is a good idea, if I've made this I'll let you know

New comment by langtang1996 in "Ask HN: How should I improve my product?"

langtang1996 — Thu, 16 May 2024 00:55:36 +0000

Thanks John, this is really helpful, I indeed need to be focused.

New comment by langtang1996 in "Ask HN: How should I improve my product?"

langtang1996 — Thu, 16 May 2024 00:47:22 +0000

Thanks Cap, this helps a lot, I'm considering keep the ui design and make two modes which can be switched

Ask HN: How should I improve my product?

langtang1996 — Wed, 15 May 2024 15:30:30 +0000

I developed a saas software (https://www.chatpapers.ai), aim to improve reading experience, which has two main features: chat with pdfs & generate mind maps. The question is: Most of my users are interested in mind map generation but not chat with pdfs, many of them type commands in the input area (which is designed to ask questions about the pdf) and try to generate a mind map according to their commands, but this feature has not been developed. How should I improve it?

I have 3 options:

  1. Add intent detection to the chat module, support both mind map generation with commands & retrieve information from the pdf in a same input box, which may increase the latency and take wrong actions.

  2. Remove the chat with pdf feature and turn the product to mind map generation, which mignt strange because the product name is chatpapers.

  3. Design a new product to focus on mind map generation, and keep this product as it is.

Which could be better? Or any other suggestions?

Comments URL: https://news.ycombinator.com/item?id=40368258

Points: 2

# Comments: 6

Ask HN: How to Improve My Product?

langtang1996 — Wed, 15 May 2024 08:44:03 +0000

I developed a saas software (https://www.chatpapers.ai), aim to improve reading experience, which has two main features: chat with pdfs & generate mind maps.

The question is: Most of my users are interested in mind map generation but not chat with pdfs, many of them type commands in the input area (which is designed to ask questions about the pdf) and try to generate a mind map according to their commands, but this feature has not been developed. How should I improve it?

I have 3 options:

  1. Add intent detection to the chat module, support both mind map generation with commands & retrieve information from the pdf in a same input box, which may increase the latency and take wrong actions.

  2. Remove the chat with pdf feature and turn the product to mind map generation, which mignt strange because the product name is chatpapers.

  3. Design a new product to focus on mind map generation, and keep this product as it is.

Which could be better? Or any other suggestions?

Comments URL: https://news.ycombinator.com/item?id=40364549

Points: 1

# Comments: 0

New comment by langtang1996 in "Debunking Devin: "First AI Software Engineer" Upwork Lie Exposed [video]"

langtang1996 — Sat, 13 Apr 2024 04:51:56 +0000

For complex systems composed of long chains of black-box units with randomness, if we evaluate their output using the three dimensions of “precision, stability, and size,” we should not have too high expectations.