I've been using Laravel Boost for a few weeks, and I will show you how you can deal with rules/guidelines.
https://github.com/laravel/boost
Regarding your question, I believe the guidelines are not too long at all, I might even add its short and quite disappointing for some libraries.
I use Claude-4-Sonnet generally which has context of 200K. Only laravel boost is close to 10K tokens with feature. I prefer to add even more by copying documentations from Context7.
Generally with Claude-4-Sonnet I think 50K per prompt is a great amount of tokens because AI will have very little room to hallucinate, it literally costs the same as 1K tokens in cursor so I am quite inclined towards feeding AI with as much context as possible.
So generally I prefer to have large context and use as much context as I can so the feature developed is close to perfect.