MacDown breaks hard link of a file it edited

MacDown breaks hard link of a file it edited.
For example, file A is hard-linked to file B. Using tools like vim, if A is modified, so will be B, which is fine. But with MacDown, after A is modified and saved, B will not.
I think during save, the old A is deleted and a new A is created, which is a new ordinary file instead of a hard link.
Wish MacDown keeps A as a hard link after modification! Thanks!

No file, test, or entry point is named in the issue. Begin by locating MacDown's save path and verify how it handles a file with a hard link; done means saving A preserves the hard-link relationship so changes remain visible through B.

Written by the indexing model from the issue text.