Thanks for your reply, and I can still see how it might work.

I’m curious if you have any resources that do some end-to-end examples. This is where I struggle. If I have an atomic piece of code I need and I can maybe get it started with a LLM and finish it by hand, but anything larger seems to just always fail. So far the best video I found to try a start-to-finish demo was this: https://www.youtube.com/watch?v=8AWEPx5cHWQ

He spends plenty of time describing the tools and how to use them, but when we get to the actual work, we spend 20 minutes telling the LLM that it’s doing stuff wrong. There’s eventually a prototype, but to get there he had to alternate between ‘I still can’t jump’ and ‘here’s the new error.’ He eventually modified code himself, so even getting a ‘mario clone’ running requires an actual developer and the final result was underwhelming at best.

For me, a ‘game’ is this tiny product that could be a viable unit. It doesn’t need to talk to other services, it just needs to react to user input. I want to see a speed-run of someone using LLMs to make a game that is playable. It doesn’t need to be “fun”, but the video above only got to the ‘player can jump and gets game over if hitting enemy’ stage. How much extra effort would it take to make the background not flat blue? Is there a win condition? How to refactor this so that the level is not hard-coded? Multiple enemy types? Shoot a fireball that bounces? Power Ups? And does doing any of those break jump functionality again? How much time do I have to spend telling the LLM that the fireball still goes through the floor and doesn’t kill an enemy when it hits them?

I could imagine that if the LLM was handed a well described design document and technical spec that it could do better, but I have yet to see that demonstrated. Given what it produces for people publishing tutorials online, I would never let it handle anything business critical.

The video is an hour long, and spends about 20 minutes in the middle actually working on the project. I probably couldn’t do better, but I’ve mostly forgotten my javascript and HTML canvas. If kaboom.js was my focus, though, I imagine I could knock out what he did in well under 20 minutes and have a better architected design that handled the above questions.

I’ve, luckily, not yet been mandated that I embed AI into my pseudo-developer role, but they are asking.

I think this is what will kill vibe coding, but not before there’s significant damage done. Junior developers will be let go and senior devs will be told they have to use these tools instead and to be twice as efficient. At some point enough major companies will have had data breaches through AI-generated code that they all go back to using people, but there will be tons of vulnerable code everywhere. And letting Cursor touch your codebase for a year, even with oversight, will make it really tricky to find all the places it subtly fucked up.

I have 3 questions, and I’m coming from a heavily AI-skeptic position, but am open:

1. Do you believe that providing all that context, describing the existing patterns, creating an implementation plan, etc, allows the AI to both write better code and faster than if you just did it yourself? To me, this just seems like you have to re-write your technical documentation in prose each time you want to do something. You are saying this is better than ‘Do XYZ’, but how much twiddling of your existing codebase do you need to do before an AI can understand the business context of it? I don’t currently do development on an existing codebase, but every time I try to get these tools to do something fairly simple from scratch, they just flail. Maybe I’m just not spending the hours to build my AI-parsable functional spec. Every time I’ve tried this, asking something as simple as (and paraphrased for brevity) “write an Asteroids clone using JavaScript and HTML 5 Canvas” results in a full failure, even with multiple retries chasing errors. I wrote something like that a few years ago to learn Javascript and it took me a day-ish to get something that mostly worked.

2. Speaking of that context. Are you running your models locally, or do you have some cloud service? If you give your entire codebase to a 3rd party as context, how much of your company’s secret sauce have you disclosed? I’d imagine most sane companies are doing something to make their models local, but we see regular news articles about how ChatGPT is training on user input and leaking sensitive data if you ask it nicely and I can’t imagine all the pro-AI CEOs are aware of the risks here.

3. How much pen-testing time are you spending on this code, error handling, edge cases, race conditions, data sanitation? An experienced dev understands these things innately, having fixed these kinds of issues in the past and knows the anti-patterns and how to avoid them. In all seriousness, I think this is going to be the thing that actually kills AI vibe coding, but it won’t be fast enough. There will be tons of new exploits in what used to be solidly safe places. Your new web front-end? It has a really simple SQL injection attack. Your phone app? You can tell it your username is admin’joe@google.com and it’ll let you order stuff for free since you’re an admin.

I see a place for AI-generated code, for instant functions that do something blending simple and complex. “Hey claude, write a function to take a string and split it at the end of every sentence containing an uppercase A”. I had to write weird functions like that constantly as a sysadmin, and transforming data seems like a thing an AI could help me accelerate. I just don’t see that working on a larger scale, though, or trusting an AI enough to allow it to integrate a new function like that into an existing codebase.