Superpowers
Not a tool but a method: encode how your team works, then let the agent follow it.
Superpowers bundles a skills framework with an opinionated development methodology, and its star count reflects frustration more than novelty — teams want someone to have already decided how agent-assisted work should run. Read it for the method even if you never install it: the value is in the sequencing and the review gates, not the scripts.
Best for: Teams that agree on process in principle but keep re-litigating it in every session
Deploy: Self-hostable