papis
Example: add a paper to the default library
papis add ~/tmp/Downloads/2103.08123.pdf --from doi https://doi.org/10.1103/PhysRevLett.128.040403 --folder-name quantumn_mechanics/Ruling_Out_Real-Valued_Standard_Formalism_of_Quantum_Theory
If you download PDF papers from journel website such as PRL, you don’t need to specify doi when adding the paper, because it is already included in the paper file.