Concerning pymatgen.analysis
Application programming interface
Atomic simulation environment
Needs more information from OP.
Electric charge analysis, partitioning, integrations, etc.
Crystallographic information file
Concerning pymatgen compatibility with different OS, Python versions, numpy versions, etc.
Issues about how to contribute, report errors, submit features
CP2K quantum chemistry package
Performance critical Cython code
PRs and issues about pymatgen plotting functionality
Dependency issues and PRs
Documentation, examples, user guides
Concerning the larger pymatgen ecosystem
Electronic structure functionality related
A new feature or improvement to an existing one
pymatgen ext package for API data fetching
Request for a new feature
PRs with new features, not enhancements to existing features