Setup p3

Write p3-models.md, a file that sets p3-stack's model per role. Default location is the current project root. Offer ~/.agents/p3-models.md as the global option, and ask which one. A project file wins over the global one.

Steps

1. Detect available models

Call orchestrator_capabilities. It lists the providers and models you can pass to delegate_task in this session, custom models included, with each one's provider instance ID and any reasoning options. That is the only source. If it returns nothing, stop and tell the user. Never write a provider or model it did not return. inherit-parent is always valid even though it is not a detected model.

2. Load current state

The roles are the labels shown in step 5. If p3-models.md already exists at the chosen location, read it and treat its # budget line and its role values as the current choices. Otherwise start from the defaults in step 3(b). A line whose role is not in step 5, such as how critics, is from a retired role. Drop it.

3. Budget, map, and confirm

(a) Ask for a budget. Ask plainly in the thread. Offer these four options with these exact labels, and name the current budget when the file records one.