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In hindsight, a totally expected achievement given where models are and the high quality tests available, but wildly impressive all the same.

I don’t know what this means but it feels like yet another milestone moment.

NextJS is bad enough, cannot imagine an Ai version

Cloudflare also lost my support because their support is among the worst, rep evn sneered (cannot update my WHOIS, still, after months of emails). Strongly recommend avoiding their platform. You will find that you lose more time & money to dealing with the issue of parity. God help you if you ever need support, almost every question in Discord goes unanswered as well.

This is pretty fascinating and comes with some complicated AI-world incentives that I've been ruminating on lately. The better you document your work, the stronger contracts you define, the easier it is for someone to clone your work. I wouldn't be surprised if we end up seeing open source commercial work bend towards the SQLite model (open core, private tests). There's no way Cloudflare could have pulled this off without next's very own tests.

Speaking more about the framework itself, the only real conclusion I have here is that I feel server components are a misunderstood and under-utilized pattern and anyone attempting to simplify their DX is a win in my book.

Next is very complex, largely because it has incrementally grown and kept somewhat backwards compatible. A framework that starts from the current API surface and grows can be more malleable and make some tough decisions here at the outset.

Crazy to see it's already being run on a .gov domain[0]. TTFGOV as a new adoption metric?

[0] https://www.cio.gov/

I'm not sure about this. LLMs can extract both documentation and tests from bare source code. That said I think you're correct that having an existing quality test suite to run against is a huge help.
> The whole thing cost about $1,100 in tokens.

I like this is called out.

someone spent over 1000 dollars to replicate the functionality of Next.JS, even 1 dollar would seem too much somehow. I suppose that is me being overly retributive.
coulda forked it for free
Nextjs had remote code execution vulnerabilities because of how they implemented react server side. I am not touching an AI version without waiting for a while.
Great to see. Could have use this last month when we migrated from OpenNext on CF to React Router 7
Here's what is buried a bit in the text:

--- start quote ---

Something like 95% of vinext is pure Vite. The routing, the module shims, the SSR pipeline, the RSC integration: none of it is Cloudflare-specific.

--- end quote ---

The real achievement is human-built Vite (and it is an amazing project).

Since Next.js's API surface and capabilities are known, this is actually quite a good use of AI: re-implement some functionality using a different framework/language/approach. They work rather well with that.

Feels a bit like the AI browser that in the end imported Servo for all difficult things.
God cloudflare's blog quality has fallen off a fuckin cliff ehh. Used to be so good now its just llm slop both content and actual writing.
Man, I love Next ... but I also love Vite ... and I hate the Next team, because they focus on fancy new features for 0.1% of their users, at the complete expense of the other 99.9% of the Next community (who they basically ignore).

This gives someone like me everything we want. Better performance is something the Next community has been begging for for years: the Next team ignored them, but not the Cloudflare team. Meanwhile Vite is a better core layer than the garbage the Next people use, but you still get the full Next functionality.

I wish Cloudflare the best of luck with this fork: I hope it succeeds and gets proven so I can use it at my company!

This is EXACTLY how I've felt. We've said it out loud multiple times but I think we never did it together.

I just wrote an open letter to fix Next.js. The goal is to compile a list of needs for whoever decides to fix those in any way possible...

https://please-fix-next.com/

i love how this disintermediates the next.js/vercel axis, which seems to be determined to make basically everything hard except for exactly what they want to do. as much as i love what vercel has done for open source in general (amazing stuff!) it is hard to interpret some of the stuff they do with next as anything other than vendor lock-in bs… the kind that i know is not in their hearts.
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> The [next.js] developer experience is top-notch.

let me add my own unqualified statement to that: no.

> Next.js has invested heavily in Turbopack but if you want to deploy it to Cloudflare, Netlify, or AWS Lambda, you have to take that build output and reshape it into something the target platform can actually run.

it's almost as if vercel had some kind of financial incentive to gear this towards their own platform.

> reimplemented the Next.js API surface on Vite directly

a clown car screeches to a halt; several burnt-out-bored oracle vs google lawyers climb out and, weirdly, i am there for it

all in all, it's definitely a good example of something we couldn't have done for $1100 pre-llms, but: should we have? did somebody consult the lava lamps?

All my homies hate Next.js
This is another example that good tests (e.g. Next.js's own test suite) are SO incredibly important to making the AI able to work on big projects autonomously with lower steering. So is a very domain-knowledgeable human in charge of steering.
I find it interesting that they bought Astro (https://blog.cloudflare.com/astro-joins-cloudflare/), which from my definitely-not-a-frontend-person perspective seems to tackle a similar problem to Next. A month ago.

If it is so cheap to make something that they recommend using (rather than a proof of concept), why buy Astro (presumably it was more expensive than the token cost of this clone?).

One conclusion is that, at the organisational level, it still makes sense to hire the “vision” behind the framework, rather than just clone it. Alternatively, maybe AI has improved that much in 1 month!

good job, now you have to support that mess that took 3774~ contributors to build.

have fun.

Next-js team is a bunch of inexperienced teens who like good looking UIs and their lousy platform to upsell their services. Very glad to see this
I would not want to be working on Cloudflare's Vercel partner team about now.. talking about a diplomacy-forward role
> Most abstractions in software exist because humans need help. We couldn't hold the whole system in our heads, so we built layers to manage the complexity for us.

Kind of a sloppy statement, but I don't think it's accurate to say abstraction or layering exists in software just because humans need help comprehending it. Abstractions often exist to capture the essence of some aspect of the real world, and to allow for software reuse. AIs will still find reusing software useful? Secondly, you equate "abstractions" with "layers" which aren't really the same thing. Layers are more about separation of concerns. Maybe it could be argued layering is a type of abstraction.

This is probably the most interesting AI experiment I've seen yet. Looking through the codebase has me wondering where all the code is. I don't know if anyone has had the displeasure of going through the next.js codebase, but I estimate it's at least two orders of magnitude more code than this reimplementation. Which makes me wonder, does it actually handle the edge cases or does it just pass the tests.

Like compare the two form implementations for example. Vinext is a completely different implementation compared to what the Next.js version does. Is their behaviour actually the same? The rewrite looks incredibly naive.

https://github.com/vercel/next.js/blob/b8cbaad24ca66ec673a7b...

https://github.com/cloudflare/vinext/blob/main/packages/vine...

Either way, pretty impressive.

The article say that "Next.js is well-specified." I... don't think this is actually true. It certainly has lots of documentation, but as has come up time and time again, there are tons of undocumented or poorly documented behaviors that have been the cause of consternation.

So I kinda wonder, did they just create the framework that Next.js claims to be but never has been? And is Next.js without the hidden stuff actually a good framework? Who knows.

The primary reason I moved away from NextJS is the constant stream of bugs. Never seen any framework or library perform as poorly as it past v0.