Φ/O: An Exploratory Foundations Thesis — Rectified, Complete Version

Φ is an atemporal, infinite-mode field. Observation O is self-coupling, with no external agent, constant and atemporal. O splits Φ into definite occupation (diagonal terms) and spacetime geometry (cross terms). Time is the distance between Φ_state and Φ_embedding. +t embedding gives matter, −t gives antimatter as CPT conjugate. Atemporal total energy cancels to 0; after embedding, the residue is Λ = 3/N ≈ 2.7×10⁻¹²² in Planck units, fitting observed 2.85×10⁻¹²² to 5.1% at L_e = 1.70×10²⁶ m (model 4.83% below observed). Baryon asymmetry η = (1/(2π)) exp(−Γ_coh/H), Γ_coh/H = 19.37 from Diósi–Penrose Planck-mode decoherence over 24 channels, gives η = 6.16×10⁻¹⁰, 1.0% from observed 6.1×10⁻¹⁰. Background is exactly ΛCDM, fitted to DESI DR2 BAO, Planck distance priors, Pantheon+, Union3.1, and DES-Dovekie full covariance, each separately, Δχ² = 0 vs ΛCDM. DESI evolving dark energy (w0, wa) is a <5σ tension, not a falsification, and not claimed as a prediction. An earlier w_eff interaction model is withdrawn as a difference-vs-sum category error. This paper is presented as an exploratory foundations preprint / sound conditional proof, given the stated axioms of holography, CPT, gravitational decoherence and 3D box quantisation — not as an unconditional proved theory.