Antigen (YC F25)

@sadjamz_ @tensarahq very cool :)

I know its such a small thing but I implemented my first CUDA kernel today! Been trying to read the PMPP book in my free time and using @tensarahq to practice :) For fellow novices: CUDA uses an SPMD programming style (single-program multiple-data). When a program calls a kernel, CUDA launches an array of thread blocks with 1024 maximum threads each. This simple kernel designates each individual element addition to a unique thread, executing all additions in a vectorAdd in parallel. Note that unlike SIMD, these processing units do not need to be executing the same instruction at the same time. The important part of the code is i = (blockIdx.x * blockDim.x) + threadIdx.x which is how we calculate which element each individual thread is responsible for. This allows us to index into a block, and within a given block a particular thread.

@xitijpatel DMed!

@zagdotdev Oh this is great. Can we chat? Bookface?

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LAUNCH HARDER going viral once isnt enough, stay unforgettable

@ycombinator @_hex_security good work @menace_codes

.@_hex_security is building AI agents that hack your systems before real attackers do. In weeks, their agents uncovered critical flaws at dozens of unicorns, earning over $250K in bounties. Hex already protects companies processing billions in transactions and millions of user records. Congrats @zer0day, @menace_codes, and @hzzzaifa on the launch! ycombinator.com/launches/POq-h…

@endpoint @browserbase @pk_iv Congrats Sameel! 🙌

i’m moving to san francisco and joining @browserbase full-time. a little over a year ago, i had no "real" experience on my resume. after selling my last company and 400+ cold applications: nothing. one warm intro later, i hopped on a call with @pk_iv. shortly after, i joined as an intern. today, i’m graduating from that role - and coming back full-time. i’m deeply grateful for the opportunity, and especially for the risks people took on me - then and now. there are only a handful of category-defining companies: twilio, stripe, vercel… i believe browserbase is next. 2026 is our year. إن شاء الله

@safizaq the goat

Seems like everyone is building B2B these days... Who's building the next great consumer app, marketplace, personal health, etc. I will invest in you + help you go viral

@emkara @Standard_Cap goated

Announcing our $7M Series A led by @Standard_Cap Sim has gone from 0 to 60,000 developers in 5 months Sim v0.5 announcement below

Just spent some time with the @_claybird team in SF and wow. Watching their workflow live made it super clear why brands like Coca Cola are coming to them. If you're launching, raising, repositioning, or just need a video that makes people care, talk to Claybird. Their AI + production pipeline is insane.

@googlewaqas thank you!

@safizaq @sadjamz_ @_AbdullahNauman taste and culture is all you need

Everyone in SF complains about the lack of late-night work spots. Two months ago, heyma opened 5 minutes away from the @_claybird office, and has become our go-to working spot They close at midnight and have some of the best chai in the city (plus good wifi and ample outlets) Today, I made the owner a calligraphy piece as a token of appreciation for treating us like family - and for letting us turn his café into a startup incubator. Claybird x Heyma SF loading....