This is something that bothers me. We had a beautiful trend on the Web of the browser also being the debugger - from View Source decades ago all the way up to the modern browser console inspired by Firebug. Everything was visible, under the hood, if you cared to look. Now, a lot of "thinking" is taking place under a shroud, and only so much of it can be expanded for visibility and insight into the process. Where is the option to see the entire prompt that my agent compiled and sent off, raw? Where's the option to see the output, replete with thinking blocks and other markup?
If that's what you're after, tou MITM it and setup a proxy so Claude Code or whatever sends to your program, and then that program forwards it to Anthropics's server (or whomever). That way, you get everything.