Hey, Boris from the Claude Code team here. I wanted to take a sec to explain the context for this change.
One of the hard things about building a product on an LLM is that the model frequently changes underneath you. Since we introduced Claude Code almost a year ago, Claude has gotten more intelligent, it runs for longer periods of time, and it is able to more agentically use more tools. This is one of the magical things about building on models, and also one of the things that makes it very hard. There's always a feeling that the model is outpacing what any given product is able to offer (ie. product overhang). We try very hard to keep up, and to deliver a UX that lets people experience the model in a way that is raw and low level, and maximally useful at the same time.
In particular, as agent trajectories get longer, the average conversation has more and more tool calls. When we released Claude Code, Sonnet 3.5 was able to run unattended for less than 30 seconds at a time before going off the rails; now, Opus 4.6 1-shots much of my code, often running for minutes, hours, and days at a time.
The amount of output this generates can quickly become overwhelming in a terminal, and is something we hear often from users. Terminals give us relatively few pixels to play with; they have a single font size; colors are not uniformly supported; in some terminal emulators, rendering is extremely slow. We want to make sure every user has a good experience, no matter what terminal they are using. This is important to us, because we want Claude Code to work everywhere, on any terminal, any OS, any environment.
Users give the model a prompt, and don't want to drown in a sea of log output in order to pick out what matters: specific tool calls, file edits, and so on, depending on the use case. From a design POV, this is a balance: we want to show you the most relevant information, while giving you a way to see more details when useful (ie. progressive disclosure). Over time, as the model continues to get more capable -- so trajectories become more correct on average -- and as conversations become even longer, we need to manage the amount of information we present in the default view to keep it from feeling overwhelming.
When we started Claude Code, it was just a few of us using it. Now, a large number of engineers rely on Claude Code to get their work done every day. We can no longer design for ourselves, and we rely heavily on community feedback to co-design the right experience. We cannot build the right things without that feedback. Yoshi rightly called out that often this iteration happens in the open. In this case in particular, we approached it intentionally, and dogfooded it internally for over a month to get the UX just right before releasing it; this resulted in an experience that most users preferred.
But we missed the mark for a subset of our users. To improve it, I went back and forth in the issue to understand what issues people were hitting with the new design, and shipped multiple rounds of changes to arrive at a good UX. We've built in the open in this way before, eg. when we iterated on the spinner UX, the todos tool UX, and for many other areas. We always want to hear from users so that we can make the product better.
The specific remaining issue Yoshi called out is reasonable. PR incoming in the next release to improve subagent output (I should have responded to the issue earlier, that's my miss).
Yoshi and others -- please keep the feedback coming. We want to hear it, and we genuinely want to improve the product in a way that gives great defaults for the majority of users, while being extremely hackable and customizable for everyone else.