This is a follow-up question to my previous question: Computing analytic derivatives of molecular Hamiltonians obtained from solving Hartree-Fock equations.
After looking at various quantum chemistry packages, such as PySCF, Psi4, and GAMESS, it is now clear that one can compute analytic molecular Hessians. However, it seems as though Hessians can only be computed analytically within the Hartree-Fock approximation, with more precise treatments using a finite-difference approach.
I was wondering: is it possible to use any of the above (or other) quantum chemistry libraries to compute Hessians analytically at the level of Full CI?