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No card processor / POS terminal on any site yet. Offering "Card" would let an operator record a card payment that never cleared a terminal, corrupting the till reconciliation — a fraud/error surface on an operator-adversary system. Add apps/web/src/lib/features.ts → CARD_PAYMENTS_ENABLED=false, gating both tender pickers (BoothPayModal, SubscriptionManager). With card off there's nothing to choose, so the tender row is suppressed and payment defaults to cash. UI-only gate: the Tender type, payment events, shift accounting, and reports still understand `card`, so historical card events and a future re-enable stay coherent. Verified via Playwright: an unpaid-ticket modal shows Total + "Pay + open barrier" with no tender/cash/card row. Wiki: new concepts/card-payments.md records the current cash-only state, the PCI-scope-out-of-app constraint, the future-POS device requirements, and the re-enable path (flip the flag once a bank-certified P2PE terminal is provisioned). Linked from index, parking-session, open-questions #3. Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V