Hey, your guess about the overall flow is correct. Point by point:
Yes. Once the Auto + Composer pool is used up, Auto, Agent, and Composer keep working and start using your API quota. The dashboard says it directly: “Consumed by Auto. Additional usage consumes API quota.”
Yes, spillover goes into the included API quota. Key detail: it’s one-way. Usage won’t move back from API to Auto. And if you explicitly pick a named model (not Auto), that usage is charged to the API quota right away and doesn’t touch the Auto + Composer pool.
Yes. When the API pool is also used up, it switches to On-Demand usage-based pricing if it’s enabled.
If On-Demand is off and both pools (Auto + Composer and API) are used up, requests just get blocked until the next billing cycle. Nothing extra is charged.
So your flow is right: Auto + Composer (included) → API (included) → On-Demand (if enabled) → blocked.
One note: Team works differently. It has one shared pool instead of two separate pools with one-way spillover. That one-way spillover behavior is for individual plans. Let me know if anything’s still unclear.