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Cloudlflare builds OAuth with Claude and publishes all the prompts

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Re: Cloudlflare builds OAuth with Claude and publishes all the prompts

#2

Post by gregorywegory »

From the readme: This library (including the schema documentation) was largely written with the help of Claude, the AI model by Anthropic. Claude's output was thoroughly reviewed by Cloudflare engineers with careful attention paid to security and compliance with standards. Many improvements were made on the initial output, mostly again by prompting Claude (and reviewing the results). Check out the commit history to see how Claude was prompted and what code it produced.

"NOOOOOOOO!!!! You can't just use an LLM to write an auth library!"

"haha gpus go brrr"

In all seriousness, two months ago (January 2025), I (@kentonv) would have agreed. I was an AI skeptic. I thoughts LLMs were glorified Markov chain generators that didn't actually understand code and couldn't produce anything novel. I started this project on a lark, fully expecting the AI to produce terrible code for me to laugh at. And then, uh... the code actually looked pretty good. Not perfect, but I just told the AI to fix things, and it did. I was shocked.

To emphasize, this is not "vibe coded". Every line was thoroughly reviewed and cross-referenced with relevant RFCs, by security experts with previous experience with those RFCs. I was trying to validate my skepticism. I ended up proving myself wrong.

Again, please check out the commit history -- especially early commits -- to understand how this went.

Re: Cloudlflare builds OAuth with Claude and publishes all the prompts

#5

Post by unshavedyak »

Yup. I'm more skeptic than pro-AI these days, but nonetheless i'm still trying to use AI in my workflows.

I don't actually enjoy it, i generally find it difficult to use as i have more trouble explaining what i want than actually just doing it. However it seems clear that this is not going away and to some degree it's "the future". I suspect it's better to learn the new tools of my craft than to be caught unaware.

With that said i still think we're in the infancy of actual tooling around this stuff though. I'm always interested to see novel UXs on this front.

Re: Cloudlflare builds OAuth with Claude and publishes all the prompts

#7

Post by hattmall »

I guess for me the questions is, at what point do you feel it would be reasonable to this without the experts involved in your case?

As an edit, after reading some of the prompts, what is the likelihood that a non-expert could even come up with those prompts?

The really really interesting thing would be if an AI could actually generate the prompts.

Re: Cloudlflare builds OAuth with Claude and publishes all the prompts

#9

Post by qsort »

unshavedyak wrote: post #5

Yup. I'm more skeptic than pro-AI these days, but nonetheless i'm still trying to use AI in my workflows. I don't actually enjoy it, i generally find it difficult to use as i have more trouble explaining what i want than actually just doing it. However it seems clear that this is not going away and to some degree it's "the future". I suspect it's better to learn the new tools of my craft than to be caught unaware. Wi…

Probably unrelated to the broader discussion, but I don't think the "skeptic vs pro-AI" distinction even makes that much sense.

For example, I usually come off as being relatively skeptic within the HN crowd, but I'm actually pushing for more usage at work. This kind of "opinion arbitrage" is common with new technologies.

Re: Cloudlflare builds OAuth with Claude and publishes all the prompts

#10

Post by paxys »

This is exactly the direction I expect AI-assisted coding to go in. Not software engineers being kicked out and some business person pressing a few buttons to have a fully functional app (as is playing out in a lot of fantasies on LinkedIn & X), but rather experienced engineers using AI to generate bits of code and then meticulously reviewing and testing them.

The million dollar (perhaps literally) question is – could @kentonv have written this library quicker by himself without any AI help?

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