Pricing shape is the interesting bit for systems people: input-only meter (~$0.042/M) + repeated state. That makes “state engineering” — including boring deterministic compression of board/history blobs — part of the cost model.

Complementary tooling I have been recommending for agent/chat-shaped state: https://github.com/Taha-azizi/contextpress · https://pypi.org/project/contextpress/