ResidentModel

One model on the card, and what the core knows about it. protocol.md § 3.

Attributes (7)

Attribute	Type	Required	Description
engine	string	Yes
variant	string	Yes
leases	number	Yes	Requests still speaking it. A model with leases is not evictable.
lastUsedAt	string	Yes	ISO 8601, UTC.
expiresAt	string	No	Absent while it is speaking, or when its keep-alive says never.
keepAliveSeconds	number	Yes	The one in force here: request, then engine, then server.
sizeBytes	number	No	What the worker measured the model taking, where it could.