ENGINEERING NOTES

Technical decisions with context and trade-offs.

Notes are derived from real Silver Fox decisions and implementation evidence. This publication does not backfill invented historical activity.

Design EngineeringSFAS2026-09-29

Bidirectional UI is a release contract, not a translation feature

Why SFAS treats direction as runtime truth, requires logical CSS properties and makes regressions in either direction release-blocking.

RTLLTRSFASAccessibility

LicensingLicense Platform2026-09-29

Effective rights should survive catalog change

Why the License Platform materializes append-only entitlement snapshots instead of calculating customer rights from mutable catalog rows on every read.

EntitlementsSnapshotsLicensingAuditability

PaymentsFox Pay2026-09-29

Payment orchestration without becoming the merchant

The BYOM boundary keeps merchant relationships and fund settlement with the customer while Fox Pay owns routing, integration and operational evidence.

Fox PayBYOMPaymentsBoundaries