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Document subscription readiness architecture #1

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biru-codeastromer merged 1 commit into from
Jul 18, 2026
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Document subscription readiness architecture #1

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9 changes: 9 additions & 0 deletions docs/architecture/decisions.md
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Expand Up @@ -57,3 +57,12 @@ traffic only after production-like evidence passes.
Promote the same immutable release from staging to production. Production
requires explicit approval, post-deploy smoke tests, observable health, and a
tested rollback.

### ADR-010 — Provider-neutral billing and internal entitlements

Keep billing disabled during the free beta. When commercial activation is
approved, treat the payment provider as the source of truth for money movement
and Katalume's server-side entitlement ledger as the source of truth for access.
All provider calls sit behind an adapter, browser callbacks never grant access,
and webhook processing is signed, idempotent, durable, ordered, and
reconcilable. See [Subscription readiness](subscriptions.md).
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