For example - say you want to always support three latest latest Python versions, no more, no less (according to Scientific Python SPEC0: https://scientific-python.org/specs/spec-0000/). Currently that would be Python version 3.13, 3.12 and 3.11. When 3.14 officially drops, you would have to move your library manually to 3.14, 3.13, 3.12.
This is what cogeol automates, see the usage example: https://github.com/open-nudge/cogeol?tab=readme-ov-file#usag.... Also works with other files, see example in the README, thanks in advance!
If you want to follow for other projects, check out the opennudge GitHub here: https://github.com/open-nudge (or associated links at the top)