Not the poster, but I wrote a Tiddlywiki plugin that uses these APIs (https://slaymaker1907.github.io/tiddlywiki/plugin-library.ht...) and I detect multiple write scenarios by keeping track of the file hash (this obviously only works for files which can be read into memory). Assuming you have a folder and not just a single file handle, you could scan the folder periodically and compare the known hashes to the ones on disk to handle moving files. Things would get much more complicated if you want to support both moving and modifying files and you'd need a system like Git for detecting renames.