Budgets

A budget is a rule policy. Instead of a condition on one action (require), it carries a counter over several actions: a sum or a count, per scope and per period. It is written in policies: and cited like any policy: {policy: remboursements-du-jour}.

Writing a budget

policies:
  remboursements-du-jour:
    type: rule
    budget: {sum: "$item.fields.amount", per: day, scope: identity, max: 500}
    reason: "daily refund cap of €500 reached"
  depense-du-jour:
    type: rule
    budget: {sum: "$selection.total", per: day, scope: identity, max: 60000}

Like any rule policy, a budget refuses by default; effect: needs-human sends the action beyond the cap to a person.

Budget and consumption

The budget caps actions, in the tenant's money or in count. What the station costs the tenant — journeys, model calls, deliveries — is its consumption: it is read in the console and billed, it is never a policy.