@lineai/billing-policy-types

Shared TypeScript contract for the Line AI spend-safety gate.

This package is types only — no values, no thresholds, no runtime logic. The gate logic itself, and the per-action configuration map, lives privately inside service-api (the chokepoint where every launch path converges before dispatch).

What's here

• GateKey — the closed union of gated service:action identifiers.
• GateBlockedReason — the closed union of denial reasons (suspended, no-payment-method, insufficient-credit).
• GateResult — the discriminated union returned by a gate evaluation, with diagnostic fields for UI rendering.
• GateRequest — optional cost-aware metadata callers can supply.
• isBlocked — narrowing type guard.

Consumers

• service-api — emits the GateResult as a 402 Payment Required body when a gated action is denied.
• @lineai/line-ai — imports the types to render the structured error (toasts, billing prompts) without referencing private threshold values.

Build

pnpm install
pnpm run build