Yeah, it’s pretty wild. Even pg is tweeting stuff like

“An experienced programmer told me he's now using AI to generate a thousand lines of code an hour.“

https://x.com/paulg/status/2026739899936944495

Like if you had told pg to his face in (pre AI) office hours “I’m producing a thousand lines of code an hour”, I’m pretty sure he’d have laughed and pointed out how pointless that metric was?

Somehow, this narrative has taken hold at multiple levels of management, especially amongst non-technical management, that "typing" was somehow the bottleneck of software engineering, reality is however more complex.

The act of "typing" code was technically mixed in with researching solutions, which means that code often took a different shape or design based on the outcome of that activity. However, this nuance has been typically ignored for faff, with the outcome that management thinks that producing X lines of code can be done "quickly", and people disagreeing with said statements are heretics who should be burned at the stake.

This is why, in my personal opinion, AI makes me only 20% productive, I often find disagreeing with the solution that it came up with and instead of having to steer it to obtain the outcome I want, I just end up rewriting the code myself. On the other hand, for prototypes where I don't care about understanding the code at all, it is more of a bigger time saver.

I could not care about the code at all, and while that is acceptable to management, not being responsible for the code but being responsible for the outcomes seems to be the same shit as being given responsibilities without autonomy, which is not something I can agree with.

More people believe a software developer job and value is in the lines of code produced.

Perhaps over half of engineering managers unconsciously or admittedly take the amount of PR and code additions as a rough but valid measure of productivity.

I recall a role in architecture, senior director asking me how come a principal engineer didn't commit any code in 2 weeks, that we pay principals a fortune.

I asked that brilliant mind whether we paid principal engineers to code or to make sure we deliver value.

Needless to say the with question went unanswered, so called Principal was fired a few months later. The entire company in fact was sold for a bargain too given it had thousands of clients globally.

The LLM can replace engineers is a phenomenon that converge from two simple facts, we haven't solved the misconception of the engineering roles. And it's the perfect scapegoat to justify layoffs.

Leaders haven't all gone insane, they answer to difficult questions with the narrative of least resistance.

Brook's law anno 2026:

"Adding manpower to a late software project makes it later -- unless that manpower is AI, then you're golden!"

“LoC is a bad metric” has been the catchphrase of engineers for years, because it runs counter to the expectations of management and the general public, right? So it makes sense that LoC is the metric used to advertise to them.

I asked Grok to rewrite your comment and it did it in 2400 words. I hope you know you'll be obsolete soon.

LLMs are incredibly eager to write new code, rather than modifying or integrating with existing systems. I agree that context windows are too small currently for this to seem sustainable. Without reasonable architecture pure vibe coded software feels like it’s going to cap out at a certain size.

I've been waiting for someone to say this. An agent will generally produce far more code than technically necessary for the task. It's a kind of over engineering which makes it increasingly harder to wrap your head around the codebase.

It’s definitely an issue when using coding assistants.

If you are careful and specific you can keep things reasonable, but even when I am careful and do consolidattion / factoring passes, have rigid separation of concerns, etc I find that the LLM code is bigger than mine, mainly for two reasons:

1) more extensive inline documentation 2) more complete expression of the APIs across concerns, as well as stricter separation.

2.5 often, also a bit of demonstrative structure that could be more concise but exists in a less compact form to demonstrate it’s purpose and function (high degree of cleverness avoidance)

All in all, if you don’t just let it run amok, you can end up with better code and increased productivity in the same stroke, but I find it comes at about a 15% plumpness penalty, offset by readability and obvious functionality.

Oh, forgot to mention, I always make it clean room most of the code it might want to pull in from libraries, except extremely core standard libraries, or for the really heavy stuff like Bluetooth / WiFi protocol stacks etc.

I find a lot of library type code ends up withering away with successive cleanup passes, because it wasn’t really necessary just cognitively easier to implement a prototype. With refinement, the functionality ends up burrowing in, often becoming part of the data structure where it really belonged in the first place.

That's because they're an additive tool. Everything boils down to "adding" more code. But in the long term its not about how much code you can add but how little you can get away with. But this is an impossible task for the LLMs. How would you train one not to write code? What would the training data look like? Would that be all the lines of code that haven't been written?

As lines of code become executable line noise, I swear that we need better approaches to developing software - either enforce better test coverage across the board, develop and use languages where it’s exceedingly hard to end up with improper states, or sandbox the frick out of runtimes and permissions.

Just as an example, I should easily be able to give each program an allowlist of network endpoints they’re allowed to use for inbound and outgoing traffic and sandbox them to specific directories and control resource access EASILY. Docker at least gets some of those right, but most desktop OSes feel like the Wild West even when compared to the permissions model of iOS.

The lines of code thing isn't because we think it's a good metric, but because we have literally no good metric and we're trying to communicate a velocity difference. If you invent a new metric that doesn't have LoC's problems while being as easy to use, you'll be a household name in software engineering in short order.

Also, AI is better at reading code than writing it, but the overhead to FIND code is real.

Respectfully, it feels like your position requires a very low, if not brain-dead level of incompetence on the part of LLM users, in order for your conclusion to be correct.

My personal anecdote: I used an LLM recently to basically vibe code a password manager.

Now, I’ve been a software engineer for 20 years. I’m very familiar with the process of code review and how to dive in to someone else’s code and get a feel for what’s happening, and how to spot issues. So when I say the LLM produced thousands of lines of working code in a very short time (probably at least 10 times faster than I would have done it), you could easily point at me and say “ha, look at ninkendo, he thinks more lines of code equals better!” And walk away feeling smug. Like, in your mind perhaps you think the result is an unmaintainable mess, and that the only thing I’m gushing about is the LOC count.

But here’s the thing: it actually did a good job. I was personally reviewing the code the whole time. And believe me when I say, the resulting product is actually good. The code is readable and obvious, it put clean separation of responsibilities into different crates (I’m using rust) and it wrote tons of tests, which actually validate behavior. It’s very near the quality level of what I would have been able to do. And I’m not half bad. (I’ve been coding in rust in particular, professionally for about 2 years now, on top of the ~20 years of other professional programming experience before that.)

My takeaway is that as a professional engineer, my job is going to be shifting from doing the actual code writing, to managing an LLM as if it’s my pair programming partner and it has the keyboard. I feel sad for the loss of the actual practice of coding, but it’s all over but the mourning at this point. This tech is here to stay.

Lines of code are nothing. It's verification that creates value.

Really it just continues to demonstrate that "code quality" is not and was not a requirement.

Even with supposedly expert human hand written software powering our products for the last decades, they frequently crash, have outages, and show all sorts of smaller bugs.

There are literally too many examples to count of video games being released with nigh-unplayable amounts of bugs and still selling millions and producing sequels.

Windows 95 and friends were famously buggy and crash prone yet produced one of the most valuable companies in the world.

Yeah, I would view this as a “levels of maturity” thing. It’s not completely misguided to judge a JD on whether they shipped 0loc or 1kloc. Assuming you have some quality counter-metric like “the app works”.

For staff engineers it’s obviously completely nonsense, many don’t code and just ship architecture docs. Or you can ship a net negative refactor. Etc.

So this should tell you that LLMs are still in “savant JD” territory.

That said, being given permission to ship more lines of code under existing enterprise quality bars _is_ a meaningful signal.

I mean many of us have... I operate in a net negative mindset. My PRs, better remove more than they add.

I also use AI this way, periodically achieving a net negative refactor.