Post-AGB Stars as Tracers of AGB Nucleosynthesis: An Update

The chemical evolution of galaxies is governed by the yields from stars, and here we focus on important contributions asymptotic giant branch (AGB) stars. AGB nucleosynthesis is, however, still riddled with complexities. Observations post-asymptotic (post-AGB) stars serve as exquisite tools to quantify understand nucleosynthesis. In this contribution, review invaluable constraints provided post-AGB which study nucleosynthesis, especially slow neutron capture (i.e., s-process).