Definition
Thoughts · Food · Breath · Behavior. The operational daily-practice mapping of the four-plane architecture. Thoughts modulate ℐ (interpretation). Food modulates Σ_chemical and B(t). Breath modulates biological resonance and parasympathetic dominance (Kₐᵤₜₒ gate). Behavior modulates π(t) — embodied output. Coherence requires all four aligned. The only place in the corpus where the planes become actionable.