Disclaimer: I hand curate them in the end

I keep most of my sessions in Zed (you can import them there anyway). After some big feature I let a frontier agent go over these sessions and suggest improvements. Typically I use gemini for this because it's really good at pruning text. Claude/GPT really wants to append more text for some reason.

I end up with smaller skills but more "actioned" skills. They kind of force the agent to do things the way that works well.