I have

The merge dialog should select the second column.

Task:

1. Create org.jabref.logic.bibtex.comparator.plausibility.PersonNamesPlausibilityComparator
2. Wire it into org.jabref.logic.bibtex.comparator.plausibility.PlausibilityComparatorFactory. Use org.jabref.model.entry.field.FieldProperty#PERSON_NAMES

For 1, use org.jabref.model.entry.AuthorList#parse and parse both sides.

• If one side has more authors - use the side with more authors
• Otherwise: Use the one with the longer string

One can get this dialog when adding following entry to JabRef

@InProceedings{Guo2025,
  author    = {Z.-Y. Guo and S.-H. Chen and A. Garland and W.-H. Chen and Y.-P. Liang and C.-M. Liu},
  booktitle = {2025 IEEE 49th Annual Computers, Software, and Applications Conference (COMPSAC)},
  title     = {Facilitating the Merging Process of Pull Requests in Automated-Testing Robot Framework},
  year      = {2025},
  address   = {Toronto, ON, Canada},
  pages     = {2313--2318},
  doi       = {10.1109/compsac65507.2025.00326},
}

... and then presses the fetch button: