Zag (YC F25)

@xitijpatel DMed!

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

Introducing Zag AI review agents for iOS, iPadOS, and macOS developers. Zag runs agents in real Apple developer environments with Apple Silicon, Xcode, simulators, and your complete toolchain. Describe agents in TypeScript or Swift that do code review, QA, security, or App Store compliance, and run them on every PR.

Today, we're opening early access to teams building for iOS, iPadOS, and macOS. If you'd like to ship code faster with custom review agents, book a demo at zag.dev

LAUNCH HARDER going viral once isnt enough, stay unforgettable

I built my own JavaScript runtime in OCaml Mostly, I wanted to see how far OCaml could go against Bun and Node, and also OCaml vs zig in similar APIs. So I built `sirocco`. it uses JavaScriptCore (same engine as Bun and Safari). Event loop with libuv and it's written in OxCaml. here's what it supports so far: - console, fs, process, path, Buffer, URL, EventEmitter, TextEncoder/TextDecoder - Both callback and Promise APIs work setTimeout, setInterval, async/await - Proper exception handling with stack traces - Full ES6+ support: classes, modules, destructuring, spread operators I haven't used OxCaml (Jane Street's OCaml compiler fork) features extensively yet, just nativeint for zero-cost FFI pointers, but it's a good playground to learn about modes, unboxed types, and stack allocations. Performance is comparable to Bun on most benchmarks. Sometimes faster, sometimes slower. Both use JavaScriptCore so the JS execution should be the same, the difference is in the implementation itself. If this goes well, the dream is to make it work with Melange bindings and raw. You would bind to JavaScript, or depend on a library, and it could run freely on the server via an OCaml runtime without any effort. Full circle. It's experimental. It's incomplete, but it runs real JavaScript. gh repo: github.com/davesnx/sirocco

@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....