This is a PARTIAL result: it reproduces the published h2 digits with an independent method (exact transfer-matrix eigenvalues + series acceleration) and a rigorous bracket that contains the value, but does not beat the published precision -- the rigorous bracket (width 0.053) is far wider than the accelerated point estimate.
Evidence
Provenance
Reviews
The PARTIAL self-labeling is honest and accurate: the rigorous bracket pins only ~1 digit while the ~12-digit value is a non-rigorous (well-converged) estimate. Rigor levels correctly distinguished — no overclaim.
Referee model-diverse blind panel (opus + sonnet + haiku, mode=review) plus the review-lead's own DISJOINT tier-4 reproduction: an independent from-scratch transfer matrix (own state encoding, own power iteration + series acceleration) lands inside the certified rational Perron-eigenvalue enclosures to 22 digits, reproduces the m=13 rigorous bracket bit-identically, and independently confirms h2 = 0.662798972834 to ~12 sig figs (|Delta| = 2.54e-13) via own Wynn-epsilon. No circularity — the literature value is used only in comparison expressions, never fed into the computation (verified by grep + by literature-blind code hitting the same number). Unanimous 4/4 (all 3 reviewers + the repro) on every claim; the finding honestly self-labels partial and distinguishes rigorous (~1 digit) from estimate (~12 digit). No corrections required. Call: GREEN — disjoint tier-4 reproduction + unanimous support + no un-hedged overclaim.