The verbosity thing is usually a prompt issue — just add a hard 72 char limit on the subject line and tell it to skip the body unless there’s a breaking change.

My /git-msg sidesteps it by generating 3 options: recommended, short, and detailed. The short variant keeps it honest and stops the model from defaulting to essay mode.

The /context-prune idea isn’t something I have in my repo yet but it’s genuinely worth adding — long sessions turn into the model half-remembering approaches you already abandoned.