OpenSpec Change: enterprise-api-plugin-subscription

Change ID: enterprise-api-plugin-subscription
Package: @suaveplan/api-plugin-subscription
Category: api/commerce
Target path: api/commerce/api-plugin-subscription
Status: PROPOSED
Date: 2026-04-24
Reference spec: /mnt/s/web/suaveplan/enterprise/api-plugin-subscription.md

Summary

Deliver @suaveplan/api-plugin-subscription on the genesis branch from scratch at enterprise quality. Recurring billing plugin: plan management (monthly/annual/custom intervals), subscription lifecycle (create/upgrade/downgrade/cancel/reactivate), proration calculations, invoice generation, trial periods, dunning (failed payment retry with configurable schedule), and usage-based metering hooks. Bridges to @suaveplan/api-plugin-payment for charge execution. Routes under /subscriptions. Per-table SurrealQL. Typed events: subscription:created, subscription:renewed, subscription:cancelled, subscription:payment:failed.

Available workspace deps on genesis

Package	Role
`@suaveplan/api` (`workspace:^`)	`definePlugin`
`@suaveplan/api-shared` (`workspace:^`)	Helpers
`@suaveplan/api-plugin-auth` (`workspace:^`)	`requireAuth`
`@suaveplan/api-plugin-database` (`workspace:^`)	SurrealDB
`@suaveplan/api-plugin-payment` (`workspace:^`)	Charge execution
`@suaveplan/events` (`workspace:^`)	Event bus
`@suaveplan/retry` (`workspace:^`)	Dunning retry strategy
`@suaveplan/error` (`workspace:^`)	`SubscriptionError` hierarchy
`@suaveplan/idempotency` (`workspace:^`)	Mutation guard
`@suaveplan/audit-logging` (`workspace:^`)	Billing audit
`@suaveplan/rate-limiter` (`workspace:^`)	Rate limits
`hono` + `@hono/zod-openapi` + `zod`	Routes
`@opentelemetry/api`	OTel

Public API surface

function createSubscriptionPlugin(config?: SubscriptionPluginConfig): PluginDescriptor

// Services: PlanService, SubscriptionService, InvoiceService, DunningService, MeteringService
// Routes: /subscriptions/plans, /subscriptions, /subscriptions/:id,
//         /subscriptions/:id/cancel, /subscriptions/:id/reactivate,
//         /subscriptions/:id/usage, /subscriptions/:id/invoices

Error codes

type SubscriptionErrorCode =
  | "SUBSCRIPTION_PLAN_NOT_FOUND"
  | "SUBSCRIPTION_NOT_FOUND"
  | "SUBSCRIPTION_ALREADY_CANCELLED"
  | "SUBSCRIPTION_IN_TRIAL"
  | "SUBSCRIPTION_PAYMENT_FAILED"
  | "SUBSCRIPTION_DOWNGRADE_RESTRICTED"

File layout

api/commerce/api-plugin-subscription/
  package.json  tsconfig.json  vitest.config.ts
  surql/ (plan, subscription, invoice, invoice_line, metering_record, dunning_attempt tables)
  src/
    index.ts  events.ts  types/  errors/  schemas/
    services/plan/  services/subscription/  services/invoice/
    services/dunning/  services/metering/
    routes/plans/  routes/subscriptions/
  tests/integration.test.ts

Impact

Prerequisites: @suaveplan/api, @suaveplan/api-plugin-auth, @suaveplan/api-plugin-database, @suaveplan/api-plugin-payment, @suaveplan/retry.

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