Methylation CSV manifest reader (MET-002/003), raw M/U assembly with bead masking (MET-005), pOOBAH detection p-values, noob background correction, linear/nonlinear dye bias, beta and M-values (MET-010..012), the 21 methylation control metrics (MET-006, bs-conv red-bg set option), per-sample ctrl/cgs tables, summary tsv/xlsx/html with the detection histogram and a beta PCA, pcs.tsv.gz, controls_raw/controls_qc.tsv; methylation datasets load in qc report (MET-014); qc controls --array-type methylation; minfi-style Sentrix_ID/Sentrix_Position sheet keys. Vendor EPIC manifests carry a 5th field on some control lines: >= 4 fields accepted. Runs on the public minfiDataEPIC set (3 x NA12878). Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01814GKVzZVL3FuF3DeiZXhv