Remark: Four-derivative jet bound is not a curvature-squared identity

Proposition prop:Ljet gives the residual-metric jet bound $(2-v)+|\gamma |\le 2+s\le 4$ after unrooted contact. That bound enumerates the differential order available in the collision coefficients; it does not identify any summand of $\Delta Q_{\mathrm{L}}$ with a curvature-squared density $R^2$, $R_{\mu \nu }{R}^{\mu \nu }$, $R_{\mu \nu \rho \sigma }{R}^{\mu \nu \rho \sigma }$, or with the variation of any such density. Equating the four-derivative jet bound with a proved curvature-squared counterterm identity would be a category error between a jet-counting statement and an action-matching statement; L-D remains unclaimed.