PhoenixAI.Store.Guardrails.CostBudget (PhoenixAI.Store v0.1.0)

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Guardrail policy that enforces cost budgets scoped to conversations or users.

This is a stateful policy that reads accumulated cost from the store adapter. The adapter must implement the PhoenixAI.Store.Adapter.CostStore sub-behaviour (specifically sum_cost/2).

Options

  • :max (required) — maximum allowed cost as a Decimal or string
  • :scope — :conversation (default) or :user

Assigns

The policy expects request.assigns to contain:

  • :adapter — the adapter module
  • :adapter_opts — keyword options for the adapter

These are injected by PhoenixAI.Store.check_guardrails/3.