Complete compilation of the One-Octonion Brane-Bulk (OOB) framework, Papers 0 through CCLXXI (272 numbered papers including Paper 0). This release adds one new paper on top of the CCLXX-tagged omnibus (1677 pp): Paper CCLXXI (Closing the Class III Wick Weight: pi-Rotation of Paired Neutrino Scars at the e_7 Node Forces f_III = 1 - 4/pi^2, 3 pp): The Class III blend weight f_III = 1 - 4/pi^2 ~ 0.5947 used across the OOB neutrino sector (Papers CCLII / CCLIII / CCLIV / CCLXIII) reproduces the JUNO Delta m^2_31 / Delta m^2_21 = 33.7957 ratio to the PDG value 33.80 at 0.013% precision. Until now the half-wave-rectified Wick angle 2/pi entering f_III was a structural axiom in the framework's Mathematical Provenance Audit (B3). This paper closes that axiom via five forced steps. (1) Cayley-Dickson H -> O introduces e_7 as the brane-bulk separator (Paper CXLIX, CCLV). (2) The doubling pairs every prior basis element with itself * e_7, so any brane scar passing through e_7 inherits a +/- pair structure. (3) The pair relative-orientation angle alpha is identified modulo pi (the alpha -> alpha + pi map is the label-swap gauge redundancy), giving a physical configuration space [0, pi] rather than [0, 2 pi]. (4) The brane amplitude projection is |cos alpha| -- the neutrino mass is the expectation value of a Hermitian positive operator, so the absolute value is required by m in R_{>=0}. (5) Born squaring of the average gives brane probability (2/pi)^2 = 4/pi^2, complement to f_III = 1 - 4/pi^2. No axiom: five independently anchored steps. Three independent framework anchors triangulate the same e_7 half-wave structure -- CCLV |delta_CP| = pi/2 sharing the e_7 doubling phase, CCLXIX 2/pi as DC Fourier coefficient at the Klein quartic boundary, Paper L diffusion-factor spectral fingerprint. Updated provenance audit count: 11 of 11 framework functions now have explicit first-principles or Lagrangian bases; 0 unforced axiomatic choices in the Class III blend. Three predictions: CCLXXI-P1 sharpened JUNO Delta m^2 ratio at <0.05% theoretical precision; CCLXXI-P2 no light sterile neutrinos at short baselines (pair structure on e_0 ... e_3 minus the scalar e_0 gives exactly three active neutrino pairs); CCLXXI-P3 cross-sector 2/pi signature at any new brane-bulk junction observable where Born squaring of an amplitude-projection average is the relevant operation. Clinical link: the same f_III = 0.5947 governs the T2* envelope in 7T MRI (CCLXIII-P3), where a Born-squared 2/pi signature should appear in 7T NMR power spectra at the brane-bulk pion-pair threshold (testable on CMRR instrumentation). Build: 1680 pages, 25.28 MB. Compiled 2026-05-30 by Bharathi Dasan Jagadeesan, M.D., University of Minnesota CMRR. ORCID 0000-0002-1143-941X. CC-BY-4.0.