# description
Out-the-door quote for one available unit (VIN). Anonymous calls return a stateless calculation with assumptions; authenticated calls (agent API key + idempotency_key) persist a deal thread and a durable quote. All money values are exact decimal strings.

# $defs.input.properties.idempotency_key.description
Required when authenticated (durable quote); ignored meaningfully only with an agent key.

# $defs.money.description
Exact decimal amount with two places (never a JSON float).