The TL;DR of the fragment at around 6:57 in the video, for those who don't want to watch, is that Boris recommends to delete all the customizations, CLAUDE.md, skills, and other stuff you had for older models, and try using the new models without all that, because the new models can surprise you.
All of these harnesses should support pinning config files and tools to specific models or families of models.<p>It's really tiring to have to tweak everything with each model release and then watch those changes mess up cheaper models in the process.
Even for older models I was (and am) of the opinion that a lot of the context-overstuffing cruft people have been wrapping around their LLM usage is more of an RNG-impacting (but not always for the better) lucky charm rather than it being universally helpful.<p>And a lot of people latched on to it as a form of self-soothing.<p>"I may not write much code anymore, but I can still be an expert prompt engineer!"
CHANGELOG: surprise me