Ask HN: What are you working on? (September 2026)

I presume you mean SEO (Search Engine Optimisation) rather than SSO (Single Sign On). Six years ago I launched a boutique search engine which downranks pages which contain adverts on them (the theory being that this would remove the incentive for creating spam) and of course contains no adverts itself (to avoid what Brin & Page described as being "inherently biased towards the advertisers and away from the needs of consumers"). Since then some other search engines have used this approach, or even gone further such as using the uBlock origin score in ranking.

Ok for example my strategy is buy Moderna. That's it. Backtest that over the last year.

Agreed on 2nd point. Especially with no real hypothesis i.e. just throw AI at it.

I am working on solving Prompt Injection!

I am building a new kind of LLM runner which lets you understand the internal reasoning process, and which can be automated to intercept hallucinations and prompt injections before they cause more damage.

(No public code yet, but I do intend to open source it)

I'm building Eigakan Guide, a cinema showtime search site for Japan:

https://eigakanguide.jp/en

I love going to the movies, but I couldn’t find an easy-to-use way to search everything currently showing in Japan. Sites such as eiga.com offer only a few filters, while individual cinema websites generally make you search one location at a time.

Eigakan Guide lets you filter showtimes by area, cinema, date, time, and features like IMAX, Dolby Cinema, 4DX, subtitled screenings, and more. For example, you can search for IMAX screenings this Friday after 7 PM.

Another problem I often see people asking about is how to find screenings with English audio or English subtitles. English-subtitled screenings have their own filter. English audio is harder because cinemas rarely publish the audio language explicitly, but a Japanese-subtitled screening of a film originally made in English will generally use the original English audio.

The site is available in Japanese and English and currently covers every TOHO Cinemas and Cinema Sunshine location in Japan. AEON Cinema is next, with more chains planned afterward.

I launched it very recently and would really appreciate feedback, especially from people who go to cinemas in Japan.

i'm not building anything public, but i started learning rust recently and using zed's gpui for building native apps. i've built a few apps for my wife but then i got stuck with nothing to build. so maybe there's a chance someone needs a non vibe coded desktop app maybe we can work something out (email in my profile)