We derive Planck's constant ℏ not as a fundamental input, but as the minimal symplectic capacity required for a nontrivial, verified foliation update preserving full-rank geometry. The Heisenberg uncertainty principle emerges as a corollary of this geometric resolution limit, not as an axiom of quantum mechanics. Key Result: h≔ inf {c(CΔ) : Δ is a nontrivial verified foliation update} where is the symplectic capacity of the minimal elementary update cell, quantized by topological consistency of update phases.