Figure L2. Commitment Stability Phase Surface. Conceptual representation of stability S(r, c) as a joint function of recursion depth r (x-axis) and constraint strength c (y-axis). Three structural regimes emerge: the drift zone (low constraint, high recursion depth) where C(Tⁿ(S)) ≪ C(S); the compression stability band (intermediate constraint) where surface stabilization occurs without full conservation; and the conservation regime (strong constraint, any recursion depth) where C(Tⁿ(S)) ≈ C(S). The stability basin is not flat — enforcement creates a ridge orthogonal to the recursion axis, constituting a structural invariant under recursive load. Dashed contours mark regime boundaries at S=0.25 and S=0.60. Patent pending Serial No. 63/877,177. DOI: 10.5281/zenodo.18792459.