The allowance loop
She can want things and ask for them: a structured proposal with what, why, and cost. What she cannot do, by construction, is touch money: on her side of the line there is no payment method, no credential, no code path.
Alix has an allowance: she proposes purchases as structured asks, what, why, cost, and a card lands in front of the builder. Approved or denied, every decision and its reasoning goes into a governance ledger, and any purchase happens outside her hands. The money itself sits across a line nothing connects to: no payment method, no credential, no code path, enforcement by omission.