Lessons for Agentic Coding: What should we do when code is cheap?

102 points - today at 7:05 AM

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spicyusername today at 11:45 AM
A lot of people down on AI in this thread, but I'm watching the industry slip over the line of trust with these latest frontier models. GPT 5.5 is the first model good enough for me to just let rip.

Every jira ticket I see now has acceptance criteria, reproduction steps, and detailed information about why the ticket exists.

Every commit message now matches the repo style, and has detailed information about what's contained in the commit.

Every MR now has detailed information about what's being merged.

Every code base in the teams around me now has 70 to 90%+ code coverage.

Every line of code now comes with best practices baked in, helpful comments, and optimized hot paths.

I regularly ship four features at a time now across multiple projects.

The MCP has now automated away all of the drudgery of programming, from summarizing emails, to generating confluence documentation, to generating slide decks.

People keep screaming that tech debt is going to pile up, but I think it's going to be exactly the opposite. Software is going to pile up because developing it is now cheap.

Most code before llms sucked. Most projects I on-boarded to were a massive ball of undocumented spaghetti, written by humans. The floor has been raised significantly as to what bad code can even look like, and fixing issues is now basically free if your company is willing to shell out for tokens.

lionkor today at 12:06 PM
If writing code was the only part of the job, and it was easy, these jobs wouldn't pay so well.

Engineering is hard. It's always going to be hard. I'm glad that AI makes some parts of it easier, and we (software engineers) can focus on engineering, that's nice.

Code is NEVER cheap. Just because, at current completely unrealistic AI pricing, using agents is cheaper than hiring juniors, does not make code cheap. It makes producing code cheap, which has always been low-cost. Every line of code is a cost, is a maintenance burden, is complexity. An AI, even with somehow infinite context window, will cost more money the more code you have.

Could you replace a whole team of engineers with AI? Probably, yeah. Could you simply fire everyone at your company and close it down, without much of a problem? Also probably yes, for most companies.

AIs can help with debugging, can help with writing code, with drafting designs, they can help with almost every step. The second you let OpenAI, or Anthropic, take full code ownership over your products, and you fire the last engineer, is the time when the AI pricing can go up to match what engineers make today. You've just reinvented the highly paid consultant.

Or you could take the middle-ground and hire good engineers, make sure they maintain an understanding of the codebase, and let them use whatever tools they use to get the job done, and done well. This is the way that I've seen competent companies handle it.

noelwelsh today at 9:23 AM
Certain types of code are cheap. Proof of concept is cheap. Adding small features that fit within the existing architecture is cheap. Otherwise, I'm not so sure. Coding agents are fantastic at minutiae, but have no taste. They'll turn a code base into a ball of mud very quickly, given the opportunity.
asG1298 today at 11:15 AM
Guy works for the Overture Map Foundation, with Amazon, Microsoft etc. being sponsors. He has been boosting AI all over the Internet. I'm sure Microslop and Amazon are very happy with these efforts.

I'm glad that "10 ways to do X" submissions are allowed as long as they boost AI.

torben-friis today at 7:59 AM
I came here exactly to point out what I'm glad to see is 10. "Free as in puppies" is a wonderful way to put it.

Every time I open linkedin I'm scared of how many big heads have taken the wrong lesson that coding almost free == free engineering. So many bait posts asking engineers why they would need to pay them any longer, or being glad they're generating millions of lines a month....this is going to end badly.

faangguyindia today at 7:51 AM
I am in India, junior developer hiring is all down. Ai has reduced offshoring to India and eliminated the need for janitor work (often offloaded to juniors).

Many people are finding it difficult to even land internships.

The most affected areas are sysadmin, devops, and frontend. Where you'll have very hard time getting any offer.

Companies like BrowserStack are withdrawing campus placement offers.

Meanwhile, I am writing apps for my own use and have reached 10,000+ monthly active users already, even though I am making zero money from doing all this, but it's fun.

utopiah today at 8:58 AM
This is such a weird argument, beside obvious #10 which will bite back with a vengeance, because... code can't be cheaper than free!

Since at least the early 80s a LOT of very important code wasn't cheap, it was free. Both free of cost (you could "just" download it and run it) but also free as freedom-respecting software.

I just don't get the argument that cheap is new. Cheap is MORE expensive than free!

boesboes today at 7:33 AM
Realize it's going to be 10-100x more expensive once you have no way back?
melvinroest today at 11:28 AM
> What should we do when code is cheap?

Make usable software. Cheap code means that you can create a lot more prototypes to then perform usability tests by finding a user and sitting next to them. I mostly worked on internal apps lately, so perhaps it's much easier for me to do than it is for some others.

jmull today at 10:17 AM
I think you can boil down most of the list to: Understand what you want to do.

I’m not convinced about rebuilding repeatedly as a learning tool though. As relatively quick as it is, it over emphasizes the front line problems you face early. Those tend to be simpler, more straightforward issues that can be more quickly solved by a few minutes of thought (and more cheaply too).

pjc50 today at 8:25 AM
Apart from (2), the first seven lessons are exactly identical to good project management practices with humans. Which are also the difficult bits.

Once upon a time, highly bureaucratic organizations tried to make a distinction between "analyst", "programmer" and "coder": https://cacm.acm.org/opinion/the-myth-of-the-coder/

The pure "coder" role, per that paper, died out almost immediately. Nowadays it's done by compilers (a deterministic automation). The distinction between analyst and programmer held out a bit longer - ten years ago I was working somewhere that had "business analysts", essentially requirements-wranglers. It's possible that the "programmer" job of converting a well-defined specification into a program is also going to start disappearing.

.. but that still leaves the specification as the difficult bit! It remains like the old stories with genies: the genie can give you what you ask for. But you need to be very sure what you want, very clear about it, and aware that it may come with unasked-for downsides if you're not.

remify today at 9:39 AM
Code might be cheaper but it's still a liability. In that regard anything that's not been properly designed and documented is going to be an even bigger issue.
azyc today at 10:50 AM
Stick to patterns which were painful before. For example, I recently refactored a project written in TS to use better-result instead of throwing errors. Without Claude writing out all of that boilerplate I could not have imagined transitioning to this. Right now the cost of "doing it right" is decreased so much there is no reason to ship slop / poorly thought out code.
gitgud today at 9:37 AM
It's cheap to change code, it doesn't mean you have to add more of it...
cermicelli today at 10:21 AM
Learn to throw code away
schnitzelstoat today at 7:39 AM
I've found the get-shit-done tool[1] to be quite useful for forcing me to properly plan the implementation and ensuring the context remains small and relevant at all times.

It is slower than when I was just using Claude directly though.

[1] https://github.com/gsd-build/get-shit-done

neowalter today at 10:07 AM
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vicchenai today at 8:46 AM
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tommy29tmar today at 8:45 AM
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DeathArrow today at 9:24 AM
>What should we do when code is cheap?

Buy in bulk and resell. /s