Committed by Hermes autonomous QA sprint 2026-08-13. These files were modified during the Aug 12 sprint but never committed.
Canonical product catalog at src/billing/catalog.js shared by Stripe Checkout client (src/billing/stripe-client.js), webhook bridge (scripts/stripe-license-bridge.js), and pricing page (status/pricing/index.html). One-time payment keyed by productId at $20/$50/$70/$99 — no more monthly/annual subscription drift. Bridge resolves duration via metadata.productId (single contract), requires payment_status === 'paid' before fulfillment (rejects unpaid/no_payment_required/missing with ack 200), handles async_payment_succeeded for ACH/SEPA delayed-payment flow. License persisted to fulfillment-store BEFORE email — SMTP failure path serves the persisted code via the new /api/v1/billing/lookup/:sessionId endpoint (the documented customer recovery path). Layer-1 (event-id) + layer-2 (session-id) idempotency prevent duplicate issuance. Checkout return URLs derived from STRIPE_PUBLIC_ORIGIN or STRIPE_ALLOWED_HOSTS (not raw Host header) — closes host-header-poisoning + session-ID-leak attack class. 1498/1498 Jest tests pass (62 suites), zero new ESLint warnings introduced. Test files: - stripe-license-bridge.test.js (24 tests) - billing-lookup.test.js (8 tests, HTTP-level) - bridge-lookup-http.test.js (5 tests, uses exported createServer) - pricing-page-catalog.test.js (9 tests, per-tier consistency) - checkout-origin.test.js (6 tests, host injection rejection) - stripe-client.test.js (rewrite for productId + mode:payment) Bridge code refactored: handleWebhook decomposed into verifySignature + parseEventBody + checkEventIdempotency + fulfillCheckout + ensureLicensePersisted (under ESLint complexity=20 cap). New createServer()/createRequestHandler() factories guarded by require.main === module. Removed 3 stale test files from the rolled-back DC-055 attempt.