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Architecture Governance / architecture (push) Has been cancelled
User answered 8 of 9 Sprint 0.1 blocking decisions (2026-08-17); backend ownership stays open pending a clearer re-ask. Recorded and propagated: - Payment chain unfrozen -> BACKEND-API-REFERENCE.md §7 and the Phase 1 contract doc's status banner both updated; Phase 1/6/7 unblocked. - No fixed external-marketplace list -> Phase 4's connector framework respecified as config-driven/generic; Sprint 4.2 retired as "per named marketplace," replaced with a generic onboarding runbook. - FX rate source: ours, in-house, as the default (not just a fallback) -> Phase 1 contract's `source` field can read "internal" as the normal case. - VK ID before OTP -> Phase 8 sprints resequenced (VK ID now 8.2, OTP 8.3). - Multi-seller orders: unified -> Phase 3.3, Phase 5.2, and Z16 updated to the resolved model (one Order, per-seller Fulfillment groups). - "Fixed 5-second payment" claim: confirmed non-issue, PAYMENT_POLL_INTERVAL_MS is already 5000 (real polling cadence, not an artificial delay). - API namespace: new endpoints only (/api/v2/...), no forced migration of legacy endpoints. - Document version: v3.1 is canonical. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>