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* fix(calibration): drop non-finite samples in Features::from_series (ADR-151) A single NaN/inf scalar sample (corrupt CSI frame) poisoned mean/variance into NaN, which — baked into a persisted PresenceSpecialist::threshold — silently disabled presence detection (every `f.variance > NaN` is false), no error raised. extract.rs is the live-inference + training feature path, yet (unlike geometry_embedding.rs) had no non-finite guard. Fix at the production boundary: filter non-finite samples before computing any statistic; an all-non-finite series degrades to Features::ZERO, same as the empty series. Value-identical for all-finite input (full_loop + existing extract tests unchanged). Pinned by two fails-on-old tests. Co-Authored-By: claude-flow <ruv@ruv.net> * refactor(calibration): de-magic specialist thresholds to named consts (ADR-151) Promote the bare default min-score literals (breathing 0.25, heartbeat 0.3) and the anomaly score scale / label cutoff (2.0× spread, > 0.5) to documented named consts. Value-identical — pinned by characterization tests asserting the consts equal the prior literals and the gate boundary (score >= floor). Co-Authored-By: claude-flow <ruv@ruv.net> * docs(calibration): record ADR-151 review — NaN fix + clean dimensions CHANGELOG [Unreleased] Security entry and ADR-151 §6.1 review note for the beyond-SOTA correctness+security review: NaN-poisoning fail-closed fix, file/path (no I/O in crate), untrusted-load, receipt/hash (absent), and the clean numerical paths — all with evidence. Co-Authored-By: claude-flow <ruv@ruv.net>