> I don't know what hackable means. You haven't defined it. I'm going to use the most generous interpretation to mean, you can modify it without impacting other places. Well you can do that if it's centralized, just copy paste it into your file and then edit it- that's no excuse to completely ban centralization! Alternatively decompose the centralized function more and only use the pieces you need.

Your definition of hackable is almost it. What’s missing is that being decentralized makes things much, much easier to understand because the code is very straightforward and doesn’t have to take 10 different things into account.

You cant just copy paste a file if it’s centralized, you’ll have to copy paste multiple, and the main issue is it’s gonna take a while to understand which ones (and you'll have to modify the imports etc., unless you copy the entire repo! are you seriously suggesting that lmao) and what’s safe to modify inside of them. Decomposing is just going to make things more complicated for no gain.

Deep learning is about the details, and whenever you start breaking things apart and putting the details in different corners that’s how you end up with code that is hard to understand and people making mistakes and not understanding what’s going on.

> Maybe it should cause 100s of failures if it's a breaking change (a bug). That's a pretty good sign you really did screw something up.

It's a syntax/interface/some-other-not-fundamental bug. A real bug would have already been spotted when checking the test-set performance .

> No it's not. If new code uses a battle tested core, I don't have to review those parts as thoroughly. If it's copy pasted, I still have to review it and make sure they didn't copy an old version with bugs or slightly modified it and broke something. Sounds like this is common as many people have complained about dozens of bugs!

The way code is shown to be correct is by getting SOTA results. If it does that it is "battle tested". If it didn't do that no one would even think of merging it in the first place.

> Yep, you've identified a place where you shouldn't try to fit every idea under a single "Attention" class. That's just common sense programming, not an argument against writing good shared functions or classes.

It is an argument against having shared classes. At the same time, sure you can have some shared code, Huggingface does that.

> It can sometimes. But not always. Having one massive file named main.py is not more readable than a well split program. This seems like basic common sense to me, but here's an actual paper on the subject:

There is an important distinction that you're ignoring here. Having semantically separate objects in one file is indeed confusing. But if put everything related to the model in one file that simplifies things and reduces the working memory people require to read your code.

> Then why does the Bert module have changes as recent as this week with changes from dozens of authors going back years?

The recent change for Bert is some inference Interfaxe code which has to be kept common across all models. That’s their decision, I wouldn’t even do that, just make kwargs mandatory imo.

> Maybe you should check your assumptions before you make a fundamental decision (you know, basic engineering). There's plenty of forked libraries that are not modified and are forked for archival purposes. Nor should you cater to a small minority if most people aren't doing this.

Everyone in deep learning likes to gamble on making some tweaks to the model hoping they’ll get the next ICLR oral. Why else would they care about modifying the model code?

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I suggest you go read some modeling code from different frameworks, one example is fairseq. I like fairseq, I think it's well done considering it's aims and constraints. But you're crazy if you think it's easier to understand and modify the code for some specific model than in huggingface. Here's the link to fairseq's roberta, you'll need to understand look at a dozen files to see what's happening. In constrast, huggingface is one file.

Spent too much time on this already, not gonna reply anymore.