Cyto model (.simurg-cyto: GC 1 kb/100 kb/1 Mb, PFB from the cluster file, optional sex-aware batch reference from normal GTCs; IN-051, CYTO-038); GC-wave correction (CYTO-003); smoothing (CYTO-004); HMM with constitutional, gain-LOH, mosaic and haploid states, forward-backward QUAL and Viterbi segments (CYTO-005/012); event statistics, effective size, post-filters, per-type thresholds, promotion/LowFraction, built-in centromere mask from UCSC cytoBand (CYTO-006..021); sex resolution (CYTO-024), ploidy; CNV VCF with bgzip+tabix (CYTO-028..031), segments parquet, cn_sample_summary.tsv and the cn_call_manifest.json sidecar. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01814GKVzZVL3FuF3DeiZXhv