scripts/p8/prepare.py lays out the 360 GEO IDATs under their header barcode/position; scripts/p8/validate_p8.py computes concordance, NRD, no-call rate, per-class and per-MAF sensitivity/specificity/precision/F1 vs NYGC 30x and GIAB HG001, replicate concordance, systematic/allele-swap site errors, per-chip batch table and duplicate detection. Cloud userdata can skip the Omni2.5 archive (OMNI=0). Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01814GKVzZVL3FuF3DeiZXhv