Block's @owenbjennings fills in the details on @jack's internal memo where he announced Block would be reducing its workforce by nearly 40%: "In the last week of November, or first week of December, things just fundamentally changed. It was with Opus 4.6 and Codex 5.3." "We basically crossed the chasm where [AI tools] were a useful tool to help a given engineer be more productive. You could autocomplete, and so on and so forth." "In late November we got to the point where these agentic systems were actually able to write the code autonomously, and the code was good enough to ship into prod. And that was a huge change." "I think many of us probably spent December and the holidays playing with the tools... Then we spent Q1 thinking, 'Okay well, how does this flow through a technology company and a software development company?' The org changes were mostly a reflection of that." "This was definitely a reaction to agentic development and what that means for technology companies."