This is the second release of the sir_ddft package. Most notably, this release includes an implementation of the SZ-DDFT model, i.e. a field theory for active matter with non-reciprocal interactions modeling a "zombie pandemic". This is a new major version as there is some API breakage: Breaking changes to the internal ODE solver Added mortality rate to SIR parameters Significant version bumps to some dependencies (PyO3/Maturin in particular) that cause visible changes at least in the Python API This release also includes significant cleanup of the example code including the code used to generate the figures in the article linked above.