{
 "what": "the lab's own results-list entry for the public-tool passivity comparison, verbatim",
 "measured_utc": "2026-10-05T22:48:12Z",
 "source": {
  "repository": "genesis (packaging & extraction)",
  "revision": "06e2f1f0",
  "path": "REGISTER_2026-09.md",
  "sha256": "29050d21c26e186faa059ca5be7933f66a30cba334470b106feac57826f41867",
  "bytes": 188838
 },
 "not_served": "the source file is the lab's whole record; this site publishes the fields its page reads, and the sha256 above commits to the rest",
 "method": "the entry's own text, copied verbatim from the committed bytes above (lines named below); claim, scope and limits are the text after the entry's own markers, unchanged; an entry whose fields use a word this site keeps for its own process is not served (S3.1-DIALECT)",
 "lines": "1249-1271",
 "title": "42. A public tool's default S-parameter fit fails IEEE-P370 passivity; the owned synthesis passes it by construction",
 "claim": "On 10 of 10 de-embedded coupons, scikit-rf's unconstrained VectorFitting emits σ_max>1 (formally non-passive under IEEE-P370) while the passive-by-construction Foster/Cayley synthesis emits σ_max≤1 on 10 of 10 — and the violation is marginal (~1e-4), which is exactly the pre-P370 non-passivity the standard exists to catch.",
 "scope": "sim-vs-sim: about the S-synthesis object (Re Y ⪰ 0 ⇒ Cayley contraction), not measured silicon. The baseline violation is REAL but MARGINAL (worst margin 6.9e-4 in the committed check record; 5.0e-4 on the 2026-09-02 re-run); a σ_max~1969 strawman was cut in the 2026-07-14 DD remediation. Grivet-Talocia post-hoc enforcement (the repo's own Gate-82 path) does not reliably converge on multi-port MTL, disclosed.",
 "limits": "RE-RUN NOTE (2026-09-02): the script derives its eval seed from the commit sha, so every re-run resamples the 10 coupons and rewrites the check record in place — the S04 re-run reproduced 10/10 vs 0/10 with different per-coupon numbers (out/offlist_logs_2026-09/tierA_p370_receipt_2026-09.txt); the committed check record was restored by path. This is the record's only Tier-A candidate (it tests a system we do not own); the 'system' is a library's default fit, not a vendor product, and no counterparty has been shown it."
}