So far what I am seeing in my seemingly simple "Wordpress last-login plugin" test is that in xhigh reasoning mode (the default, seemingly) it overthinks so badly that it writes terrible bushy code with edge cases caused by going down rabbit holes.

In "medium" reasoning mode, you get the classic Qwen wait/actually thinking loops you see in 3.6 that I guess will need to be interrupted in the way others do already with an over-thinking guard proxy.

(In one of my test runs it is now on "OK TRULY FINAL APPROACH" after having got through "FINAL FINAL APPROACH". Can relate)

It gets stuck in a thinking loop regarding the WordPress API and (resolvable) ambiguity in my prompt, that I guess might be resolvable with a custom skill with hints on how to look it up (and maybe with the devdocs MCP).

In Low reasoning effort mode it flies through the task and writes pretty solid code. So maybe it is me overthinking what is needed here...