Ask HN: Can you share what you built using Cursor/Agentic IDEs?

7 points by ludamn 176 days ago | 8 comments

I had played with Cursor/Claude Code a bit but would like to see the result of other people's work using these tools, bonus point if you can share the source.

If it matters, I'm asking this to gather information to make a decision, I received an offer to work in a company that requires all code to be crafted this way.

I already have a good job and I'm happy with it, so besides a much bigger/trendier name in my CV and more pay there's not a lot in this opportunity for me. I'm also aware that if I were to leave my current position my team could be heavily affected since I usually play a key role in helping us deliver work on time (not that my company would do the same for me, but at the end of the day I don't want to willingly screw my coworkers' chance of success/stability).

As for this new opportunity: What concerns me is that I'm worried about the scale/size of the applications and if current SotA LLMs are capable of building something that's maintainable in the long run. They're a big name company and this work isn't for any of their main products, so I fear that this might just be a pet project for them and if it doesn't work they will scrap everyone involved in the project in a few months.

Sorry for asking this on a public forum, unfortunately I don't have folks in my circle that could help me w/ this question, so all I can say is thanks in advance for your help :bow:!

PS I tried googling and didn't find conclusive results to this question (this is a polarized topic!), it doesn't help that most links I found in popular reddit threads on this subject are dead, the most notable app I found was WithAffluent

joegibbs 176 days ago |

I think the ideal limit as far as complexity with no manual coding would be something like this new marketing site for my game (warning: 100mb of video on Chrome): https://redo--fallofanempire.netlify.app/

Cursor with Gemini 3. I didn't manually write a single line for it (except for the actual wording). Gemini did the React stuff, styling, writing ffmpeg commands for re-encoding the videos to work better with scroll-based scrubbing, splitting them out into AVIF image sequences for mobile, etc. I use Cursor + Codex for the actual game as well but it involves a lot of manual work - even with a really modular system like Unreal it gets convoluted.

I tried doing a spreadsheet application heavily using Sonnet 4 (https://app.embedsheet.ai/) and found it would make a ton of mistakes and massive files that it would then be unable to reason with, I think if I did it again I'd do all the core stuff by hand.

ludamn 175 days ago | |

Thanks for sharing!

btw on https://redo--fallofanempire.netlify.app/ the "Wishlist on Steam" link at the bottom of the page points to a different game "This Curse is Metal as Hell"

what 175 days ago | |

Why does this site even use react?

joegibbs 174 days ago | | |

Why not? With that kind of overhead from the assets an extra 200kb of JS is only going to make a minute difference in terms of load speed. It uses a lot of animation stuff that is provided by React libraries (Framer Motion, WebGL normal-based relighting, ThreeJS particles) that would need to be done separately otherwise and the component structure helps keep it organised.

muzani 176 days ago |

I've done it on a lot of fintech production stuff over the last few years. I won't link them as it's a little misleading because they're not exclusively coded in these tools. Rather they're used as parts and helpful for grepping and running tests after the work is done.

They're something like electric vehicles - faster, cheaper, safer, with some new unknowns to be wary of. The bad stuff comes from expecting 2x the work done with half the people. If the employer gives you time to code properly, read, revise, it's all great. You'd be writing code faster, reading more code, understanding more code, having many eyes reviewing the code.

You will get to 10k LOC in a day, which means that you have to set architecture up right away for any new project. You'll need to do best practices, things like XP which people tend to skip over because they don't have time.

It is also very bad with things that it's not trained on, like custom SDKs and integrating GPT-5. This is much like trying to drive your EV through a river.

ludamn 175 days ago | |

Thanks for the detailed answer, you hit the nail on the head in terms of giving me the information I was looking for

> The bad stuff comes from expecting 2x the work done with half the people. If the employer gives you time to code properly, read, revise, it's all great.

They made it clear they're expecting former than the latter. In one interview they stated they're building a lean team of elite devs who'll be able to work 12hrs shifts to deliver stuff asap using these Tools, which is why I wanted to see people's experiences of building projects solely with agentic AIs and how they manage to maintain them in the long run

iamflimflam1 176 days ago |

I made this recently: https://buzzer-studio.atomic14.com/lpc-encoder

kentich 176 days ago |

I've built for fun with Bolt.new:

https://tendayweekcalendar.com/

I did no manual coding except small bug fixing.