- signal/raw_xy.py: vectorised Infinium I/II raw X/Y and control assembly (plan §7.1) with a per-chip address-map cache; IN-027 coverage gate - core/schemas.py: Arrow schemas (loci, sample_intensity, controls), deterministic atomic Parquet writing - pipeline/ingest.py + CLI: discovery, sheet, IN-010 naming, overwrite check before any work, spawn-based workers, per-sample isolation, --resume by input hashes, run manifest, exit codes 0/3/4 - matches gtc2vcf raw X/Y and controls exactly on 18 GSA samples; outputs byte-identical across thread counts and layouts Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01814GKVzZVL3FuF3DeiZXhv