Billing

Billing

Comp AI billing is SKU-first and subscription-ready. Stripe is the payment provider; Comp AI owns catalog definitions, entitlement state, usage gating, and audit history.

Core Rules

• Use @trycompai/billing for SKU keys, amounts, Stripe product IDs, Stripe price IDs, cadence, and included usage.
• Do not add product-specific nullable fields to OrganizationBilling.
• Keep org-level billing generic: stripeCustomerId, stripePaymentMethodId, and paymentMethodUpdatedAt.
• Store per-product state in generic per-SKU tables keyed by skuKey.
• Gate paid actions from local entitlement/usage state, not directly from Stripe object reads.
• Treat Stripe webhooks as eventually consistent, retryable, and possibly out of order.
• Make webhook and entitlement handling idempotent with Stripe event IDs, invoice IDs, subscription item IDs, and period start/end.
• Archive accidental live/test Stripe objects instead of reusing them blindly.

Current SKU Shape

• Active background-check subscriptions: background_checks_monthly_3 ($79/mo, 3 checks), background_checks_monthly_10 ($199/mo, 10 checks), and background_checks_monthly_20 ($399/mo, 20 checks).
• Active penetration-test subscriptions: pentest_monthly_1 ($299/mo, 1 scan), pentest_monthly_3 ($499/mo, 3 scans), and pentest_monthly_5_current ($899/mo, 5 scans).
• Deprecated / legacy SKUs remain in the catalog for historical Stripe records: background_check_one_time, background_checks_monthly_25, pentest_monthly_4, pentest_monthly_5, and pentest_monthly_10.

Live catalog entries should only be added after deliberate live Stripe object creation.

Implementation Pattern

1. Add or update SKU definitions and Stripe IDs in packages/billing/src/index.ts and packages/billing/src/sku-definitions.ts.
2. Store Stripe IDs in the catalog by environment rather than adding new env vars.
3. Create subscriptions through Stripe Checkout mode: subscription.
4. Use the shared Stripe customer default payment method unless the product explicitly needs overrides.
5. For allowance products, sync local subscription state from Stripe subscription items and period timestamps.
6. Record usage in the billing usage ledger with a stable idempotency key.
7. Record support-relevant mutations in billing audit events.

Webhooks

Handle these events before launching subscription access:

• checkout.session.completed
• invoice.paid
• invoice.payment_failed
• invoice.payment_action_required
• customer.subscription.updated
• customer.subscription.deleted

Provision or renew allowance only for the matching subscription item and SKU. Do not use generic invoice-level periods for multi-item subscriptions.

Validation

• Run bun run db:generate after Prisma schema changes.
• Run bun run check:prisma-schemas to catch stale copied schema fragments.
• Run catalog tests after SKU changes.
• Add webhook tests for duplicate events, out-of-order delivery, payment failure, action required, cancellation, and renewal.