Just in time for Claude to slip into senescence. 
Now that I have thought about this for a bit and read what human beings have written around the internets about this...
... I'm almost certain this is a storm in a teacup, or mass psychosis. I don't believe there is any massive enshittification going on. Have seen absolutely zero proof of that.
Things that strike me very odd:
No large-scale reporting of similar problems
at the same time (except the normal dissatisfaction noise). If you google about it, "everyone else" started seeing the same problems
weeks/month later - fitting the classical "mass psychosis" confirmation bias pattern perfectly. IOW - they react to this report and start "seeing things". I did start seeing things, too, but if I look at my old logs or introspect properly, those things are suddenly gone.
The original author
had no working baseline. There was not even a week of stable use experience. Author describes it like this:
"The 80x increase in API requests is not purely from degradation-induced thrashing. It also reflects a deliberate scaling-up of concurrent agent sessions that collided with the quality regression at the worst possible moment."
This sounds totally classic to me. Have seen this many times, with or without AI. You get something new, great, complicated, fancy working. You start to scale up quickly. It breaks down.
Completely normal. You didn't understand why it worked and what are the limitations. It either failed by coincidence, or wasn't scalable. It is easy to misattribute the reason for failure.
And don't get me wrong - changes on Anthropic's side may be contributing factors -
some of those observations are likely real. For example, they might have added the stopping conditions. I realized those stopping conditions early in my journey (so they were already there somewhere early March) and they look totally like something glued on top on system prompt or something. "Try 3 things and then say 'this is a natural stopping point for today'". And to be honest, I don't think that's a bad way to manage resource usage at all. People like the author of the report, launching gazillion autonomous unsupervised agents producing crap, then discarding that crap, is extremely wasteful. Sure, if that feature was not present earlier, then it's worse now for those who want long, autonomous sessions. But it does not make the model shallower or stupider or use more tokens because of it going in loops because it's stupid now. That's a much harsher claim which would require some actual evidence measuring that depth directly. The read-write ratio is a very interesting hint about something, but it could as well indicate difference in prompting or projects. No stable baseline, no comparison possible.
This should be actually simple for the author to test - take the old logs, old git state, and rerun the
same experiments again. It is very interesting and revealing that author did not try to do that.
The most likely explanation: the author tried to scale up too fast; had not enough experience how their process works; gave it less attention as they thought "now it works on its own" - the classical automation development thing, it fails the very moment you let it loose without supervision. They did not know the true limitations because
the process was never tested doing the same tasks with same amount of parallelization. They were so happy with their new process they just pressed the pedal down fully. They don't know
what broke and why.
Or, in other words: honeymoon wore off for them. It seemed to work, but what they tried was too ambitious, too fast, too soon - too big a piece of cake to eat at once. Now they see the reality and think Claude significantly changed (became stupid, shallow, etc.).
Seeing how well this thing works, how deeply it reads and understands complex codebases
today, it's hard to imagine that what I'm using now is some sort of completely broken, shallow-thinking quackery of what it was. While I haven't personally used Claude in February, I know those who have, in exactly the same codebase I work with. They haven't seen any such quality difference. It's so damn good now it's hard to believe it was
significantly better in the past.