Phase 1: Ingesting Raw Rows
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1. Private VPC Enclosure
EMR + Spark
EMR cluster, Spark executors, and raw Iceberg tables remain locked within an isolated VPC with no public IP and zero external ingress.
2. Secure SSH Tunnel
AES-256
Claude Code connects strictly via an encrypted SSH tunnel. Job definitions dispatch inwards across the bastion boundary.
3. Returned Through Tunnel
Stats Only
Spark aggregates data in VPC memory. Only 4 scalar statistical metrics are routed back through the SSH tunnel to Claude.