ShipStation T06–T09 (cutover + decommission)
Integration + Designer Prep (July) critical priority
low confidence
Why
Second half of plan: feature flags, divergence monitor, cutover, phased decommission. AfterShip drop locked behind early-July decision.
How
- T06: USE_SHIPSTATION_TRACKING_DUAL/_PRIMARY flags + shadow columns
- T07: Divergence monitor (Hasura cron + Slack)
- T08: Cutover (PRIMARY=true) after ≥14 days <0.5% divergence
- T09: Code → soak → schema → vendor decommission
Related Memory
project_shipstation_tracking_migration