No wonder most people at Anthropic believe our jobs are in jeopardy, they've already made a system wherein the machines are treating them like pets.
I really don't get the tendency here from Anthropic to describe what's most likely churn? A high pressure amount of changes/PRs a day on a TUI to wrap a while loop? I'm not going to be a reductionist here so I'm going to cut it off there, I'm positive that the complexity of handling multiple terminal emulators is something that needs some handling (even if doing their own rendering engine was a self made problem). Yes I've vibe coded my own harness from scratch without writing any of it, I still know how it works.
I'm also not sure that they addressed point 2 in any actual capacity? They say "the system verifies itself" which is cool and is something that automated testing has done for decades, but they eschew the mental model of how the system works as a whole and prefer instead to have the LLM focus and summarize a slice of the system when they need to know about it or ask for it. But.... That's not knowledge? That's just search a la google? And thus seems to be subject to the same problems where the quality of your search dictates the quality of your knowledge that you surface at any given time?
N.B. Changed "1000 PRs" to "A high pressure amount" to be vague since the article is vague here on what CC undergoes.
> have the LLM focus and summarize a slice of the system when they need to know about it or ask for it. But.... That's not knowledge? That's just search a la google? And thus seems to be subject to the same problems where the quality of your search dictates the quality of your knowledge that you surface at any given time?
This is the crux. Take pause, because hidden here is a sea-change in our fundamental trust model of software...
There is no longer anyone to turn to if this system breaks by, eg, having a critical bug that no one can figure out. No causal model in anyone's head that can be appealed to, to slowly and methodically debug. By design, the system is too large for that, and everything hinges on Claude itself being able to find and understand the right slice of the system in any situation. As long as that very new invariant holds, everything will be all right. If it fails catastrophically, there is no recovery. You are the owner of a recovered alien spacecraft with tech you have no hope of understanding.
The new trust model is: We trust Claude to always understand the system enough to debug anything or make any reasonable change we could want. The risk might be worth the reward. But it's worth explicitly laying out the deal we're making.
Tbf, it's worth pointing that many large legacy systems already work like that (sort of), with "Claude" replaced by "whoever happens to be maintaining it this year".
> wherein the machines are treating them like pets
I know some people will groan hearing the phrase again, but: "Reverse centaur." A centaur is a synergistic combination of two things, but now those things are in the wrong position: The human is the computer's tool.
Naturally, how "wrong" it is tends to depend on whether you ask the people who do all the work or the people who own all the computer-capital.
I think it's just a different focus on what matters.
There's clearly enormous (human) work that goes in to building and tuning their models.
The software they develop around their model is, relatively, trivial. It's not clear that enormous amounts of (human) energy need to go in to that code.
It seems largely a function of applying human energy towards the things that are marginally most important to generating you money and putting you in front of competitors.
My favourite quote at the moment: "May not man himself become a sort of parasite upon the machines? An affectionate machine-tickling aphid?" Samuel Butler, Erewhon, 1872
I saw someone say the other day (in response to another blog post being well written) that Anthropic employees have a rule against using AI for writing/external comms? That seems clearly not the case here, normal people don't write like this:
> Most of the path is automated; a person's attention goes where the risk is
> The eval grows with every incident, and every change to the reviewer is scored against all of it.
100%, although if people are getting 90% of their interaction from a robot, one may start to pick up some vocal tics and colloquialisms from machine world. a kind of robo-pidgin.
this definitely seemed like something claude generated, i know because i frequently do all my research in chat and then ask it to generate a doc based on what we talked about and when i read what it generates the verbosity, the style it writes in makes me delete the whole thing. I would never subject readers to that.
I think this is the future. Im more bullish than bearish. The only issue is that eventually human verification can no longer be possible and we will have to live under AI-verification assumptions....
I'm thinking about high volume mass manufacturing as an example here. I like those "How it is made" type YouTube videos. You see a production line that has some kind of QA process where cameras + automated systems do spot checks at high speeds and these crazy actuators are punching out bad examples. These processes often also involve spot checks where some statistical sample is selected and viewed carefully.
I don't think we've gotten to that level of reliable review with code, but I don't see any reason we can't continue moving in that direction.
I really like those videos too, but a very big difference is, in manufacturing QA, the system outputs a very high number of copies of a very small number of possible types, so spot checks work fine from an operations research point of view, as the variance in output has a known upper bound.
For code, I think things go in the opposite direction: the system outputs artifacts that are all different among themselves (even more so now that we no longer distribute software via physical copies. Well, bits are always physical, but I mean we no longer ship floppies/CDs/DVDs).
That said, at least in my experience, code review has never been a direct part of factory-line-type QA. That QA is typically done by treating software as a black box and just verifying that it complies with a spec (often times based on a very loose definition of "spec" ...), and this is something that works equally well regardless of whether a human or a machine wrote the software. The type of QA that is done (among other things) by code reviews is checking whether the software's design is such that it will be economically feasible to maintain and extend it, for example.
The one part the code reviews takes a part of (but is in no way error-free) and that you just can't do with black-box testing (or it is much harder to do) is to look for things like backdoors. As our industry moves more towards "agents write software and tests validate that it works," I think a lot about "Reflections on Trusting Trust" and the new and wide attack surface added by people no longer reading the code shipped on their behalf.
That’s a category error. Software isn’t stamping out the same part again and again; if it were review would be simple. Analogies often mislead.
Of course Anthropic would love you to think you are heading towards that future so we have to bear in mind their livelihood depends on LLMs being the future of work and 30k changes a day being normal.
But why would we want 30k changes a day in a given product, what possible justification could there be?
I understand the skepticism and I can't claim I am right. But some points come to mind.
First, I think we overestimate how different code is from other code. We even joke about CRUD apps and how cookie-cutter they are. A lot of changes in those apps are: add some new features to a data access layer (SQL, ORM, whatever), add new routes, add new UI surface, etc. There is an entire industry around "Design Patterns" and people live by the DRY axioms. Things like Ruby on Rails exists because rebuilding these systems over and over is wasteful. I feel we are just moving further down that same path.
Second, your question of "why would we want" is totally backwards. Progress doesn't follow your desires. Progress doesn't require justification. Sometimes we adapt the environment to our needs, other times we adapt to a changing environment. Which case we are currently in is still undecided and you are free to fight for the future you prefer. But demanding an industry justify itself before it is allowed to change fails in the face of evolution. If it works, we will justify it in hindsight.
Those manufacturing videos are of someone making the exact same thing over and over. Months and years of testing go into ensuring that there is no change in the system, and continuous monitoring is put in place so that if any changes slip in, it can be undone. The design is set in stone, as it should be, and variations are bugs. There are months to years of cheap prototypes, iteration, design changes, pipeline tuning, and verification to ensure that nothing will need to change for the next million items.
If you want a software analogy to those devices getting churned off the assembly lines, it's the TCP streams coming out of your network card, with crazy checksums punching out bad packets.
We're orders of magnitude better at reliability with code, but we're regressing on that metric rather quickly. And the comment above deeply misunderstands both manufacturing and software.
Those machines are not doing design work. They automate production of designs that had long development and testing lifecycles. Code is design. The compiler is the automated production process.
Before all came to this, I've been promoting reviews at $dayjob not as gatekeeping but as method to exchange information and build more team spirit. We are an internal service team working by "projects", which makes us a very disjointed team with barely any communication. (Part of it is also German work culture.)
And now this. Suffice to say, my efforts did not bear fruit. I feel more isolated than ever before.
"Anthropic told investors that it will profit on a measure called adjusted operating income.
"According to the report, adjusted operating income excludes stock-based compensation, which is not unusual for technology companies. However, the report also quotes its gross margins - above 80% - exclude revenue shared with distribution partners, as well as the cost of training its models."
I wonder how they account for free credits given in this spend. We got given US$5k free API credits from them a couple months ago and even accounting for our Claude Code subscription spend, I think we're still ahead overall - they haven't made any money from us! And they just gave us another few hundred bucks a month of API credit as part of our subscription.
Antropic's revenue is up [1], [2], [3] and if you calculate adjusted operating income (by excluding most expenses like training costs) then by that measure it is profitable. However, if you factor in all the numbers it is operating at a loss.
Source? Only reports I’ve seen was they were profitable for one month in last quarter due to xAI discount of renting out colossus . Be interested to learn otherwise.
How is the ability of a human to understand the code via hands-on familiarity not a direct dependency of their ability to do manual code review? I don't get it. Having claude write an explainer (something I do a lot!) doesn't get you to the point where you can confidently assess a complex diff. And you've funneled your priors on what the diff says and does through the same system that already reviewed and approved it. This article isn't bad but it doesn't give enough weight to the human context-building part of the problem.
Yes it used to be said, the code is not the asset, the people who know what the code does and how to change it are the asset.
Now we’re just going to outsource our capacity to design and review because it’s faster that way, as if the thing that was wrong with the software industry was that releases weren’t being pushed out often enough.
What I’m more worried about is feature identification and how to monitor them. How can you get the product to the next level?
Honestly I’m not worried about code anymore in my codebase I’ve not had bug problems for a while and incidents get fixed automatically.
I monitor new features with an agent who checks recordings.
Most actually good features need still 20-30 iterations to design the userflow to actually be interactive, but then there is also another challenge to translate usage patterns into features and how to present functionality with the least amount of friction as possible.
How to efficiently run monitors without wasting your token spends. A best 'monitor' best practice would be nice.
Still this article was very helpful and gave me a lot of new ideas.
I'm somewhat surprised they would say Claude is writing 90% of their code at this point. Did they get tired of reporting new milestones, or has there been a plateau?
All good ideas, I have been doing something similar for half a year. The most important thing is to reduce bugs and ensure the code does what you wanted. Writing code tests, logging, interacting with the running app are essential. For intent realignment I like to have the agent re-read all user messages posted in that project. It only takes a few minutes even on a 10,000 message project. Then use this fresh derivation of user intent to check code and tests. For long spans of work I prefer to generate a todo list which remains as a document in the project. Each closed gate tracks feedback from the agent on what happened. This task file is also reviewed twice - once before implementation and once after. So the formula is - review agents - tests - user message logs.
Here I am still unable to stop myself from doing line-by-line code review. I notice too many things (redundant code, duplicate code, overly complex architecture, etc.) by doing it that I feel it would be careless not to.
My advice is to start a totally vibe coded side project. You will never gain confidence until you experiment, find the failure cases, learn to deal with them, etc.
Choose something you want to do but don't really care that much about. Be more ambitious than you think you could be, have a high bar on the outcome but purposefully choose to completely ignore the actual code. Make it write tests, dashboards, monitoring - whatever you need other than code to feel confident.
Now is the cheapest time it will ever be to experiment.
Issue: I am still unable to stop myself from doing line-by-line code review
Response: Try experimenting in a low stakes environment
From Google: "Exposure therapy is a psychological treatment designed to help people confront their fears, break cycles of avoidance, and reduce anxiety."
I think that depends on where you work. If your company demands that all code is reviewed then anyone who doesn't do that should be spoken to.
However, I suspect there are teams that are making different choices. In the most obvious example, I can do whatever I want on my personal projects (I hope you agree). And if I started a business and hire in programmers, I have some expectation on defining the culture, making hiring decisions based on my preferences, etc.
Whether or not such teams succeed will be a matter of fact, which I do not believe has been decided at this time.
I hate to say this, but you're now living in a world where the value of artisanal code is rapidly approaching zero. If you still cling to beautifully written code as your core qualification, you're having a rough future ahead of you.
And I say this with the bitterness of someone having lost a big part of what made me enjoy this line of work.
Because one may learn that those fears are overblown. Or they may learn that they cannot build any kind of software without reviewing every line of code.
The person is saying "I am still unable to stop" and that is most likely because they feel a sense of responsibility. If they choose a project where there is no responsibility, where it literally doesn't matter if the project fails, they may feel able to stop. And if they manage to make that project work, if they can succeed, then they will build up confidence.
It seems better to be able to work both on projects where they review all code as well as projects where they do not review any code. In fact, keeping their job in the long term may (or may not) require having both skills.
I guess they’re just saying “you’re holding it wrong”
Last time I chose to vibe code, I did it in a language I didn’t know so that I wasn’t tempted to try and comprehend the choices the robot made. I ended up with the application I wanted.
Caveat: it was code I would never have to touch again, I ran a script to generate the 140,000 static html pages that the rails app provided and then just uploaded them all to R2 buckets (million reads per month on free tier)
I think the intended takeaway is to learn to solve those problems without line by line review. Start by being hands off on a low stakes project, and see how the model fails. Then, come up with, and try, solutions that aren't you doing archeology.
This somehow assumes that the person above doesn't already do all the magic the people say work 100% of the time, and finds these issues. How does running into literally the same issues in a low-stakes project help?
I think it's a good assumption. Their comment implies they aren't harnessing the coding agent very strongly given the failure modes they mention.
Do you think it's better to experiment with high stakes projects? Do you think it'll be easier to avoid defaulting to line by line auditing of a project that is high stakes?
Is it responsible to move slowly when your competitors are moving quickly? Depends on how your competitors perform. If they perform well, then your "responsibility" suddenly becomes your extinction.
No one cares about good code. It’s a means to an end. Your code doesn’t need to look pretty or be well documented or any of that stuff anymore because people are not looking at it. The only thing people care about is performant and error free code.
AI tends to add new wheels for a new feature in a large codebase, because finding, understanding, and generalizing the existing code to integrate a new feature will likely break existing features, cost more effort (and token) to implement and test. Human reviewers also tend to like these code since they are clean, easy to review, and get the job done, especially when they are not familiar with existing codebase.
The issue is that wheels like these accumulate in the codebase, and they inevitably entangle. When an upstream specification changes, when a new feature that works with many existing features are introduced, all these wheels need to be revisited, and in many cases they are not because the new test cases do not cover all the paths. The code base got larger and more complex, and contains more bugs than the unit tests can cover, especially when unit tests are often "bent" to fit the wrong behavior unnoticed.
The worst part about this is that if you aren't watching it, the AI will "solve" this with a thousand assert_3_plus_5_equals_8() test cases that just further clutter the workspace and the context window. Churn baby churn.
The models are pretty good at finding code duplication and eliminating it though, and it's usually part of my AI review process at this point
If you let it go buck wild on a massive change, there are those times where it sort of paints itself into a corner but rewrites are cheap (for now), so it's just not that big of a deal, imho
Literally 50 years of engineering history and culture cares about whether code is good. There are libraries worth of books about it, not as a means to an app but for its own beauty. Just read “The Elements of Programming Style”, for example.
Do what you want, write apps with AI and don’t review code, it doesn’t impact me. The claim that no one cares about good code is demonstrably false, and that’s all I’m objecting to.
The way you phrase it makes me realize its almost like a GPL contamination. Eg, once you pull in GPL code, your project is infected and can never use a BSD (or other GPL incompatible) license.
Similarly, once you pull in terrible AI slop code, the project becomes unmaintainable by humans and you need to maintain it with AI.
There’s a little irony about the example you picked of the GPL, just because in the US the output of an LLM cannot be covered under copyright. The GPL works as an assignment of rights under copyright.
Code that isn't duplicated in 15 places, that doesn't read the whole database to fetch just 1 record, that doesn't do 15 database reads where one would suffice, that uses an optimized algorithm instead of an exponential one recreated badly from scratch... all that is also good code, and is just as important in LLM-slop era.
It looks like they are specifically optimizing for incidents/reverts and shipping faster
> The goal hasn't changed: less human time per change, and no more reverts than before.
Is this Goodhart's law in action? Less reverts and less incidents was measured and became the target. Is this then still a good measure? I guess Revenue is a more direct measure, but we don't have access to that one.
From my perspective as a power user, the product has improved substantially over the past six months. It has gained new features that are actually useful, lots of UI/UX/perf improvements, and bug fixes as well.
New features have actually been remarkable. For me they are almost always in one of two categories: things I've always wanted (but never actually bothered communicating to the devs), and things I didn't know I needed but did. The product team is clearly very tuned in.
what are people using for automated code review these days? the claude code review product originally mentioned it cost "$15-25 per review" (which is absurd), but it seems like they've removed that from their docs with the launch yesterday. we've looked at various products in the space (coderabbit, greptile, etc.) but have gripes with each.
honestly i'm thinking it might be easier (and cheaper) to launch our own agent from GH webhooks and trigger `/code-review`..
We've had great success with a custom gh action on a self hosted runner. It sets up codex and all the same stuff a dev has on their machine:
So dbs, seed files, etc, and then just a review prompt and some skills and a few scripts.
It triggers on a new published PR or if tagged @bot-name. It's way better than the other services we've tried (which was admittedly ages ago) because you can get it to work exactly how you want it and it's dead simple.
With Codex, for the time being at least, you can use a subscription, so it's basically free if you're already paying for one. But on API pricing it's still not too bad as it doesn't produce that much output.
I set this all up in about half a day. Codex does 99% of the heavy lifting.
Using a different lab's model to review the code to the one that wrote it. Claude model plans/codes, OpenAI model reviews, or vice versa, or DeepSeek or GLM or whatever.
in a vacuum, sure. the average pull request will have multiple commits once opened (i.e. to address feedback or perhaps it was opened too early), each triggering a review. it's very easy to rack up $100+ per pr (and an eng may open a dozen prs in a single day)
The UI has improved substantially over the past six months. New capabilities are prominently featured and less-used ones are de-emphasized or removed. Every product goes through this type of evolution. The difference with Claude Code is that at the speed they iterate, it happens a lot faster and is therefore more noticeable.
I just learned that manually invoked skills MUST be the _first_ thing in the prompt, e.g. you can't have `disable-model-invocation: true` and say "Hi, /grill-me on X".
Worse, everything after the /grill-me is injected a second time into the prompt as a <command-args> so your prompt is literally added to the context TWICE. (first time in the original user prompt.)
I swear Anthropic is intentionally bloating your context so you burn tokens on useless bullshit like this.
I was running into something similar where I had it working on a single Python file. Maybe part of the issue is that I had memory turned off, and the conversation might have spilled into two conversations. I wasn't using version control either, but since it was a single file with about 1000 lines of code, it didn't seem too hard to eventually get all of my features back.
I snorted laughing at this. "We are experiencing tremendous growth" and it's just a codebase with 1,000 agents endlessly adding markdown documentation for every 1 line change.
There was a post some months back called "Lines of Code Got a Better Publicist" or something along those lines. This is just more of that. I am not impressed by 30 thousand "changes" per day in the slightest without significant added context. When I logged in and prompted Claude today, do I feel like I got +600,000 change value from when I logged in a month ago?
lol right? So youre telling me they shipping 150,000 features this week? Or, maybe, they whack-a-moled 149,995 perf or bug regressions and shipping 5 new things. :shrug:
It’s only about 10 per engineer. I’m not at Anthropic and before 2026 I was regularly hitting 1400 commits / year on my GitHub. If agents made me 2x faster (they have, review is still slow; I currently have 40 PRs open) that’d be the same rate.
Right, but why do things this fast to begin with, especially for a product that's already publicly available?
I don't want to use a product that shifts under me as I use it several times a day. I want a product that actually moves slowly and works very reliably.
As an end user: why would I care about how many hundreds of releases a month are being pushed if maybe 1% of them have features I care about?
I am not sure what it is you are saying. What I am saying: I would have supposed that Claude writes 99.x% of Claude's Code code, and that ~no code at Anthropic is written by humans anymore.
I agree finding out who is writing that 10% of the code in the AI company is important. Maybe time to identity them and put them on PIP since they are slowing down everyone else and giving a bad name to the AI company
No. 90% sounds like a low number. That implies something else is writing 10% of the code? People? Other models? What on earth is writing that other 10%?
No wonder most people at Anthropic believe our jobs are in jeopardy, they've already made a system wherein the machines are treating them like pets.
I really don't get the tendency here from Anthropic to describe what's most likely churn? A high pressure amount of changes/PRs a day on a TUI to wrap a while loop? I'm not going to be a reductionist here so I'm going to cut it off there, I'm positive that the complexity of handling multiple terminal emulators is something that needs some handling (even if doing their own rendering engine was a self made problem). Yes I've vibe coded my own harness from scratch without writing any of it, I still know how it works.
I'm also not sure that they addressed point 2 in any actual capacity? They say "the system verifies itself" which is cool and is something that automated testing has done for decades, but they eschew the mental model of how the system works as a whole and prefer instead to have the LLM focus and summarize a slice of the system when they need to know about it or ask for it. But.... That's not knowledge? That's just search a la google? And thus seems to be subject to the same problems where the quality of your search dictates the quality of your knowledge that you surface at any given time?
N.B. Changed "1000 PRs" to "A high pressure amount" to be vague since the article is vague here on what CC undergoes.
> have the LLM focus and summarize a slice of the system when they need to know about it or ask for it. But.... That's not knowledge? That's just search a la google? And thus seems to be subject to the same problems where the quality of your search dictates the quality of your knowledge that you surface at any given time?
This is the crux. Take pause, because hidden here is a sea-change in our fundamental trust model of software...
There is no longer anyone to turn to if this system breaks by, eg, having a critical bug that no one can figure out. No causal model in anyone's head that can be appealed to, to slowly and methodically debug. By design, the system is too large for that, and everything hinges on Claude itself being able to find and understand the right slice of the system in any situation. As long as that very new invariant holds, everything will be all right. If it fails catastrophically, there is no recovery. You are the owner of a recovered alien spacecraft with tech you have no hope of understanding.
The new trust model is: We trust Claude to always understand the system enough to debug anything or make any reasonable change we could want. The risk might be worth the reward. But it's worth explicitly laying out the deal we're making.
Tbf, it's worth pointing that many large legacy systems already work like that (sort of), with "Claude" replaced by "whoever happens to be maintaining it this year".
> wherein the machines are treating them like pets
I know some people will groan hearing the phrase again, but: "Reverse centaur." A centaur is a synergistic combination of two things, but now those things are in the wrong position: The human is the computer's tool.
Naturally, how "wrong" it is tends to depend on whether you ask the people who do all the work or the people who own all the computer-capital.
I think it's just a different focus on what matters.
There's clearly enormous (human) work that goes in to building and tuning their models.
The software they develop around their model is, relatively, trivial. It's not clear that enormous amounts of (human) energy need to go in to that code.
It seems largely a function of applying human energy towards the things that are marginally most important to generating you money and putting you in front of competitors.
>The software they develop around their model is, relatively, trivial
30,000 changes a day is not my idea of trivial.
> I really don't get the tendency here from Anthropic to describe what's most likely churn? 1000 "PRs" a day on a TUI to wrap a while loop?
From the article, the 30,000 changes a month are in the monorepo, and Claude Code is in a separate repo. So it’s not the TUI that has 1,000 PRs a day.
I could easily see 1,000 PRs a day on the backend. Big tech was doing more than that pre-AI.
Fair enough, I did invent the 1000 a day because the article was vague, I'll edit my submission accordingly to also be vague
My favourite quote at the moment: "May not man himself become a sort of parasite upon the machines? An affectionate machine-tickling aphid?" Samuel Butler, Erewhon, 1872
I saw someone say the other day (in response to another blog post being well written) that Anthropic employees have a rule against using AI for writing/external comms? That seems clearly not the case here, normal people don't write like this:
> Most of the path is automated; a person's attention goes where the risk is
> The eval grows with every incident, and every change to the reviewer is scored against all of it.
100%, although if people are getting 90% of their interaction from a robot, one may start to pick up some vocal tics and colloquialisms from machine world. a kind of robo-pidgin.
this definitely seemed like something claude generated, i know because i frequently do all my research in chat and then ask it to generate a doc based on what we talked about and when i read what it generates the verbosity, the style it writes in makes me delete the whole thing. I would never subject readers to that.
Pangram reports 80% of the text is AI-generated: https://www.pangram.com/history/72309aad-6e3f-4002-bdc5-c062...
I think this is the future. Im more bullish than bearish. The only issue is that eventually human verification can no longer be possible and we will have to live under AI-verification assumptions....
At 30k commits a day, is there anything that can meaningfully be called review?
I'm thinking about high volume mass manufacturing as an example here. I like those "How it is made" type YouTube videos. You see a production line that has some kind of QA process where cameras + automated systems do spot checks at high speeds and these crazy actuators are punching out bad examples. These processes often also involve spot checks where some statistical sample is selected and viewed carefully.
I don't think we've gotten to that level of reliable review with code, but I don't see any reason we can't continue moving in that direction.
I really like those videos too, but a very big difference is, in manufacturing QA, the system outputs a very high number of copies of a very small number of possible types, so spot checks work fine from an operations research point of view, as the variance in output has a known upper bound.
For code, I think things go in the opposite direction: the system outputs artifacts that are all different among themselves (even more so now that we no longer distribute software via physical copies. Well, bits are always physical, but I mean we no longer ship floppies/CDs/DVDs).
That said, at least in my experience, code review has never been a direct part of factory-line-type QA. That QA is typically done by treating software as a black box and just verifying that it complies with a spec (often times based on a very loose definition of "spec" ...), and this is something that works equally well regardless of whether a human or a machine wrote the software. The type of QA that is done (among other things) by code reviews is checking whether the software's design is such that it will be economically feasible to maintain and extend it, for example.
The one part the code reviews takes a part of (but is in no way error-free) and that you just can't do with black-box testing (or it is much harder to do) is to look for things like backdoors. As our industry moves more towards "agents write software and tests validate that it works," I think a lot about "Reflections on Trusting Trust" and the new and wide attack surface added by people no longer reading the code shipped on their behalf.
That’s a category error. Software isn’t stamping out the same part again and again; if it were review would be simple. Analogies often mislead.
Of course Anthropic would love you to think you are heading towards that future so we have to bear in mind their livelihood depends on LLMs being the future of work and 30k changes a day being normal.
But why would we want 30k changes a day in a given product, what possible justification could there be?
I understand the skepticism and I can't claim I am right. But some points come to mind.
First, I think we overestimate how different code is from other code. We even joke about CRUD apps and how cookie-cutter they are. A lot of changes in those apps are: add some new features to a data access layer (SQL, ORM, whatever), add new routes, add new UI surface, etc. There is an entire industry around "Design Patterns" and people live by the DRY axioms. Things like Ruby on Rails exists because rebuilding these systems over and over is wasteful. I feel we are just moving further down that same path.
Second, your question of "why would we want" is totally backwards. Progress doesn't follow your desires. Progress doesn't require justification. Sometimes we adapt the environment to our needs, other times we adapt to a changing environment. Which case we are currently in is still undecided and you are free to fight for the future you prefer. But demanding an industry justify itself before it is allowed to change fails in the face of evolution. If it works, we will justify it in hindsight.
Those manufacturing videos are of someone making the exact same thing over and over. Months and years of testing go into ensuring that there is no change in the system, and continuous monitoring is put in place so that if any changes slip in, it can be undone. The design is set in stone, as it should be, and variations are bugs. There are months to years of cheap prototypes, iteration, design changes, pipeline tuning, and verification to ensure that nothing will need to change for the next million items.
If you want a software analogy to those devices getting churned off the assembly lines, it's the TCP streams coming out of your network card, with crazy checksums punching out bad packets.
We're orders of magnitude better at reliability with code, but we're regressing on that metric rather quickly. And the comment above deeply misunderstands both manufacturing and software.
Those machines are not doing design work. They automate production of designs that had long development and testing lifecycles. Code is design. The compiler is the automated production process.
It's conducting/steering/oversight/supervision, not reviewing.
I dont believe it, its FOMO marketing to me.
Before all came to this, I've been promoting reviews at $dayjob not as gatekeeping but as method to exchange information and build more team spirit. We are an internal service team working by "projects", which makes us a very disjointed team with barely any communication. (Part of it is also German work culture.)
And now this. Suffice to say, my efforts did not bear fruit. I feel more isolated than ever before.
And so the wildly unprofitable AI company explains how it token maxes it's code and review process.
Authors should really try and view this article from the perspective of someone who has to think about cost to use the models.
Anthropic has been profitable for the past two quarters.
"Anthropic told investors that it will profit on a measure called adjusted operating income.
"According to the report, adjusted operating income excludes stock-based compensation, which is not unusual for technology companies. However, the report also quotes its gross margins - above 80% - exclude revenue shared with distribution partners, as well as the cost of training its models."
From https://www.morningstar.com/news/marketwatch/2026091414/the-...
I wonder how they account for free credits given in this spend. We got given US$5k free API credits from them a couple months ago and even accounting for our Claude Code subscription spend, I think we're still ahead overall - they haven't made any money from us! And they just gave us another few hundred bucks a month of API credit as part of our subscription.
How so? Can you link to the numbers?
Antropic's revenue is up [1], [2], [3] and if you calculate adjusted operating income (by excluding most expenses like training costs) then by that measure it is profitable. However, if you factor in all the numbers it is operating at a loss.
[1] https://finance.yahoo.com/technology/ai/articles/anthropic-v...
[2] https://fortune.com/2026/09/29/anthropic-leaked-ipo-prospect...
[3] https://www.cnbc.com/2026/10/15/anthropics-third-quarter-rev...
Source? Only reports I’ve seen was they were profitable for one month in last quarter due to xAI discount of renting out colossus . Be interested to learn otherwise.
Profitable as in after expenses.
https://youtu.be/T-oXyXwD6sE?si=tauzXVyGmQ6MhI_5
“I think that, every time you see the word EBITDA, you should substitute the words "bullshit earnings.” ― Charles T. Munger
And what they're reporting is adjusted even further than EBITDA
We're talking about being actually profitable, not fake profitable.
Yes when you subtract expenses and capex
> Low - Docs, copy, internal-only features, additive changes behind a flag
> None required once automated review and security checks are green
How anybody can let an LLM write docs and not even read them is pure insanity.
How is the ability of a human to understand the code via hands-on familiarity not a direct dependency of their ability to do manual code review? I don't get it. Having claude write an explainer (something I do a lot!) doesn't get you to the point where you can confidently assess a complex diff. And you've funneled your priors on what the diff says and does through the same system that already reviewed and approved it. This article isn't bad but it doesn't give enough weight to the human context-building part of the problem.
Yes it used to be said, the code is not the asset, the people who know what the code does and how to change it are the asset.
Now we’re just going to outsource our capacity to design and review because it’s faster that way, as if the thing that was wrong with the software industry was that releases weren’t being pushed out often enough.
Mfw tui needs a billion prs per day.
Opus 5.5 is obviously stellar but come on what are you doing lol
> Security gets its own automated review too. ... You either fix it or close the thread with a short reason, which is how you clear a false positive.
I hope this is only for low-risk false positives. Dismissing a critical finding as a false positive should still involve AppSec.
You could improve revert rates while simultaneously introducing more security vulnerabilities.
And the linked "claude-code-security-review" explicitly states in the README
> This action is not hardened against prompt injection attacks
That's a significant limitation for an AI security review control, no?
What I’m more worried about is feature identification and how to monitor them. How can you get the product to the next level?
Honestly I’m not worried about code anymore in my codebase I’ve not had bug problems for a while and incidents get fixed automatically.
I monitor new features with an agent who checks recordings.
Most actually good features need still 20-30 iterations to design the userflow to actually be interactive, but then there is also another challenge to translate usage patterns into features and how to present functionality with the least amount of friction as possible.
How to efficiently run monitors without wasting your token spends. A best 'monitor' best practice would be nice.
Still this article was very helpful and gave me a lot of new ideas.
I'm somewhat surprised they would say Claude is writing 90% of their code at this point. Did they get tired of reporting new milestones, or has there been a plateau?
All good ideas, I have been doing something similar for half a year. The most important thing is to reduce bugs and ensure the code does what you wanted. Writing code tests, logging, interacting with the running app are essential. For intent realignment I like to have the agent re-read all user messages posted in that project. It only takes a few minutes even on a 10,000 message project. Then use this fresh derivation of user intent to check code and tests. For long spans of work I prefer to generate a todo list which remains as a document in the project. Each closed gate tracks feedback from the agent on what happened. This task file is also reviewed twice - once before implementation and once after. So the formula is - review agents - tests - user message logs.
i am tired of listening about other ppls agent setups. Everyone thinks they've discovered something cool and unique but They are all the same.
Its like telling other ppl about your dreams. Not interesting.
For real, my eyes completely glaze over, there is nothing interesting in it.
Here I am still unable to stop myself from doing line-by-line code review. I notice too many things (redundant code, duplicate code, overly complex architecture, etc.) by doing it that I feel it would be careless not to.
My advice is to start a totally vibe coded side project. You will never gain confidence until you experiment, find the failure cases, learn to deal with them, etc.
Choose something you want to do but don't really care that much about. Be more ambitious than you think you could be, have a high bar on the outcome but purposefully choose to completely ignore the actual code. Make it write tests, dashboards, monitoring - whatever you need other than code to feel confident.
Now is the cheapest time it will ever be to experiment.
[flagged]
Please don't do this here.
(You're welcome to make your substantive points thoughtfully, of course.)
https://news.ycombinator.com/newsguidelines.html
Issue: I am still unable to stop myself from doing line-by-line code review
Response: Try experimenting in a low stakes environment
From Google: "Exposure therapy is a psychological treatment designed to help people confront their fears, break cycles of avoidance, and reduce anxiety."
The thing is that's not an issue in the slightest, it doesn't need therapy!!
It's those who don't do it who'd need a talk..!
I think that depends on where you work. If your company demands that all code is reviewed then anyone who doesn't do that should be spoken to.
However, I suspect there are teams that are making different choices. In the most obvious example, I can do whatever I want on my personal projects (I hope you agree). And if I started a business and hire in programmers, I have some expectation on defining the culture, making hiring decisions based on my preferences, etc.
Whether or not such teams succeed will be a matter of fact, which I do not believe has been decided at this time.
I hate to say this, but you're now living in a world where the value of artisanal code is rapidly approaching zero. If you still cling to beautifully written code as your core qualification, you're having a rough future ahead of you.
And I say this with the bitterness of someone having lost a big part of what made me enjoy this line of work.
No. The issue is: "I notice too many things (redundant code, duplicate code, overly complex architecture, etc.) during review"
How does "low-stakes environment" fix that?
Because one may learn that those fears are overblown. Or they may learn that they cannot build any kind of software without reviewing every line of code.
The person is saying "I am still unable to stop" and that is most likely because they feel a sense of responsibility. If they choose a project where there is no responsibility, where it literally doesn't matter if the project fails, they may feel able to stop. And if they manage to make that project work, if they can succeed, then they will build up confidence.
It seems better to be able to work both on projects where they review all code as well as projects where they do not review any code. In fact, keeping their job in the long term may (or may not) require having both skills.
I guess they’re just saying “you’re holding it wrong”
Last time I chose to vibe code, I did it in a language I didn’t know so that I wasn’t tempted to try and comprehend the choices the robot made. I ended up with the application I wanted.
Caveat: it was code I would never have to touch again, I ran a script to generate the 140,000 static html pages that the rails app provided and then just uploaded them all to R2 buckets (million reads per month on free tier)
I think the intended takeaway is to learn to solve those problems without line by line review. Start by being hands off on a low stakes project, and see how the model fails. Then, come up with, and try, solutions that aren't you doing archeology.
This somehow assumes that the person above doesn't already do all the magic the people say work 100% of the time, and finds these issues. How does running into literally the same issues in a low-stakes project help?
I think it's a good assumption. Their comment implies they aren't harnessing the coding agent very strongly given the failure modes they mention.
Do you think it's better to experiment with high stakes projects? Do you think it'll be easier to avoid defaulting to line by line auditing of a project that is high stakes?
This is why I like GitHub Copilot's autocompletion, I'm right there guiding and policing the code as it appears.
You're unable to stop being responsible? Tragic!
Is it responsible to move slowly when your competitors are moving quickly? Depends on how your competitors perform. If they perform well, then your "responsibility" suddenly becomes your extinction.
Apple's iPhone Duo seems like it'll be a huge hit.. how many years after the competitors?
They've built an entire strategy around moving slow and doing it better
If they move quickly by shipping crap they're just running towards a wall, the responsible thing is to not follow them.
No one cares about good code. It’s a means to an end. Your code doesn’t need to look pretty or be well documented or any of that stuff anymore because people are not looking at it. The only thing people care about is performant and error free code.
People saying this are telling on themselves that they have no idea what quality code is. It's not about looking pretty or nice variable names.
Code quality matters to AI just as much as it did to people
Do you have any data backing this statement? Or is it just your experience?
Personal experience:
AI tends to add new wheels for a new feature in a large codebase, because finding, understanding, and generalizing the existing code to integrate a new feature will likely break existing features, cost more effort (and token) to implement and test. Human reviewers also tend to like these code since they are clean, easy to review, and get the job done, especially when they are not familiar with existing codebase.
The issue is that wheels like these accumulate in the codebase, and they inevitably entangle. When an upstream specification changes, when a new feature that works with many existing features are introduced, all these wheels need to be revisited, and in many cases they are not because the new test cases do not cover all the paths. The code base got larger and more complex, and contains more bugs than the unit tests can cover, especially when unit tests are often "bent" to fit the wrong behavior unnoticed.
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Yep.
The worst part about this is that if you aren't watching it, the AI will "solve" this with a thousand assert_3_plus_5_equals_8() test cases that just further clutter the workspace and the context window. Churn baby churn.
I haven't had this issue since like last year with frontier models. What are you using?
All the models do this. I'm literally right now watching Opus 5.5 duplicating code even after telling it to fix duplication.
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The models are pretty good at finding code duplication and eliminating it though, and it's usually part of my AI review process at this point
If you let it go buck wild on a massive change, there are those times where it sort of paints itself into a corner but rewrites are cheap (for now), so it's just not that big of a deal, imho
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Literally 50 years of engineering history and culture cares about whether code is good. There are libraries worth of books about it, not as a means to an app but for its own beauty. Just read “The Elements of Programming Style”, for example.
Do what you want, write apps with AI and don’t review code, it doesn’t impact me. The claim that no one cares about good code is demonstrably false, and that’s all I’m objecting to.
> it doesn’t impact me
so long as his software isn't used for anything that can affect you
Not true, LLM’s will struggle with badly organized and designed large codebases just the same, though likely with less errors and profanities.
The biggest concern is that AI can doxx you and find where you live if your code sucks. If that doesn't scare you, nothing will.
> No one cares about good code. It’s a means to an end.
I do, my coworkers do, my friends do, etc etc.
I think a more generous interpretation of the parent comment would have been: "No one [in business] cares about good code" .
Your end users certainly don't either, heck they'll gladly sit there and scroll through their phone until the 50GB React app loads.
Good code is a means to the end of the code being error (and vulnerability) free, maintainable and performant.
And if people are not looking it, those people don't care about their customers.
The way you phrase it makes me realize its almost like a GPL contamination. Eg, once you pull in GPL code, your project is infected and can never use a BSD (or other GPL incompatible) license.
Similarly, once you pull in terrible AI slop code, the project becomes unmaintainable by humans and you need to maintain it with AI.
There’s a little irony about the example you picked of the GPL, just because in the US the output of an LLM cannot be covered under copyright. The GPL works as an assignment of rights under copyright.
This is, of course, tangential to your point.
Code that isn't duplicated in 15 places, that doesn't read the whole database to fetch just 1 record, that doesn't do 15 database reads where one would suffice, that uses an optimized algorithm instead of an exponential one recreated badly from scratch... all that is also good code, and is just as important in LLM-slop era.
It looks like they are specifically optimizing for incidents/reverts and shipping faster
> The goal hasn't changed: less human time per change, and no more reverts than before.
Is this Goodhart's law in action? Less reverts and less incidents was measured and became the target. Is this then still a good measure? I guess Revenue is a more direct measure, but we don't have access to that one.
From my perspective as a power user, the product has improved substantially over the past six months. It has gained new features that are actually useful, lots of UI/UX/perf improvements, and bug fixes as well.
New features have actually been remarkable. For me they are almost always in one of two categories: things I've always wanted (but never actually bothered communicating to the devs), and things I didn't know I needed but did. The product team is clearly very tuned in.
All in all, I'd say their approach is working.
FWIW, Pangram identifies several sections as 100% AI-written.
Poorly I'm afraid, given how many new bugs make their way to the claude code CLI every update.
what are people using for automated code review these days? the claude code review product originally mentioned it cost "$15-25 per review" (which is absurd), but it seems like they've removed that from their docs with the launch yesterday. we've looked at various products in the space (coderabbit, greptile, etc.) but have gripes with each.
honestly i'm thinking it might be easier (and cheaper) to launch our own agent from GH webhooks and trigger `/code-review`..
We've had great success with a custom gh action on a self hosted runner. It sets up codex and all the same stuff a dev has on their machine:
So dbs, seed files, etc, and then just a review prompt and some skills and a few scripts.
It triggers on a new published PR or if tagged @bot-name. It's way better than the other services we've tried (which was admittedly ages ago) because you can get it to work exactly how you want it and it's dead simple.
With Codex, for the time being at least, you can use a subscription, so it's basically free if you're already paying for one. But on API pricing it's still not too bad as it doesn't produce that much output.
I set this all up in about half a day. Codex does 99% of the heavy lifting.
Using a different lab's model to review the code to the one that wrote it. Claude model plans/codes, OpenAI model reviews, or vice versa, or DeepSeek or GLM or whatever.
> the claude code review product originally mentioned it cost "$15-25 per review" (which is absurd)
If an engineer paid $150,000 a year reviews some code manually for about 30 minutes, the cost of their time is about $36.
in a vacuum, sure. the average pull request will have multiple commits once opened (i.e. to address feedback or perhaps it was opened too early), each triggering a review. it's very easy to rack up $100+ per pr (and an eng may open a dozen prs in a single day)
That explains why the UI keeps changing.
How is this a proper product? Every time you open the desktop app the buttons may be on a completely random place
The UI has improved substantially over the past six months. New capabilities are prominently featured and less-used ones are de-emphasized or removed. Every product goes through this type of evolution. The difference with Claude Code is that at the speed they iterate, it happens a lot faster and is therefore more noticeable.
You can call it however you want, but in the end it is just poor engineering. Imaging building a bridge that needs construction every week
Well, that explains the Github repo with 5000 issues, maybe about a third of which are random regressions of previous behavior.
I just learned that manually invoked skills MUST be the _first_ thing in the prompt, e.g. you can't have `disable-model-invocation: true` and say "Hi, /grill-me on X".
Worse, everything after the /grill-me is injected a second time into the prompt as a <command-args> so your prompt is literally added to the context TWICE. (first time in the original user prompt.)
I swear Anthropic is intentionally bloating your context so you burn tokens on useless bullshit like this.
Oh /loop was the crowning achievement. Basically guarantees you'll run a prompt at max context without caching over and over.
I was running into something similar where I had it working on a single Python file. Maybe part of the issue is that I had memory turned off, and the conversation might have spilled into two conversations. I wasn't using version control either, but since it was a single file with about 1000 lines of code, it didn't seem too hard to eventually get all of my features back.
I snorted laughing at this. "We are experiencing tremendous growth" and it's just a codebase with 1,000 agents endlessly adding markdown documentation for every 1 line change.
Remind me to invest more in the clouds they are burning those tokens in.
Claude Code is great, but do you really push that much (new) code every day?
30 thousand changes merged per day? no. like just no. what are we doing? I'm trying to understand
There was a post some months back called "Lines of Code Got a Better Publicist" or something along those lines. This is just more of that. I am not impressed by 30 thousand "changes" per day in the slightest without significant added context. When I logged in and prompted Claude today, do I feel like I got +600,000 change value from when I logged in a month ago?
I’m horrified by it. There is no possible justification for it but it does explain their buggy products.
lol right? So youre telling me they shipping 150,000 features this week? Or, maybe, they whack-a-moled 149,995 perf or bug regressions and shipping 5 new things. :shrug:
I, too, can write and merge 30000 changes per day. Even 300000 if I've up to.
Of course, just like "line of code" is a worthless metric, "change merge per day" is;
(automerged PR, JOB IS DONE)The premise is clear, is one agent can do what developer can, but quicker, why not speed up the whole workflow to match it?
Have you used Claude Code?
Have you seen the benefit of the churn of 1000 PRs a day?
It’s only about 10 per engineer. I’m not at Anthropic and before 2026 I was regularly hitting 1400 commits / year on my GitHub. If agents made me 2x faster (they have, review is still slow; I currently have 40 PRs open) that’d be the same rate.
> 40 PRs open
Ah, so you've privatised the benefits and externalised the costs.
Right, but why do things this fast to begin with, especially for a product that's already publicly available?
I don't want to use a product that shifts under me as I use it several times a day. I want a product that actually moves slowly and works very reliably.
As an end user: why would I care about how many hundreds of releases a month are being pushed if maybe 1% of them have features I care about?
Speed is not the product.
More code output isn't a metric of success per se. Goodhart's law.
Humans don't operate at AI speeds. We're making the car go from 0 to 5000 mph in 1 second and the drivers are turning to goo in the seat.
I wonder how they maintain the quality of tests for such a massive codebase and frequent commits.
That's the trick: they don't
And yet they can't fix the janky bugs when you scroll or show/hide chain of though, commands executed, configuring plug-ins from the options menu etc.
everything is shipped with auto reviews behind a flag. then you need a human approver to launch
good model
If the entire body of this article isn't just an "LGTM" then I know they're lying.
That's a shockingly low number.
1000/day in what sounds like a single repo is a low number?
I am not sure what it is you are saying. What I am saying: I would have supposed that Claude writes 99.x% of Claude's Code code, and that ~no code at Anthropic is written by humans anymore.
I agree finding out who is writing that 10% of the code in the AI company is important. Maybe time to identity them and put them on PIP since they are slowing down everyone else and giving a bad name to the AI company
to achieve what?
Honestly not sure that there are that many effective changes a day given how little complexity there is to their public facing product.
No. 90% sounds like a low number. That implies something else is writing 10% of the code? People? Other models? What on earth is writing that other 10%?
90% ?
A random twitter said that, 6 month ago, it was 100% !
DECLINE ! SELL THE STOCK OPTIONS ! (wait, there are none, confused!)
Anthropic's solution to anything is to simply burn more tokens. Because of course.
Anyway, flagging as misinformation.
Title is: How the Claude Code team does code review