They sit in folders you rarely open. They accumulate quietly: some written months ago, most long out of mind. You cannot review what you cannot see. PlainSight walks a folder of Markdown, text, HTML, Word and PDF files, shows it as the tree it is on disk and renders the one you pick. It reads nothing until you choose a folder; the chooser opens on your home directory, which asks no permission of you.
A repository's release history imported from GitHub, newest first, read like any other folder.
A folder of documents grows the way a drawer fills. Nothing announces itself, nothing asks to be reviewed, so the writing you rely on most is the writing you have never gone back to. PlainSight opens the drawer.
The folder as it is on disk, with the document you picked rendered beside it.
PlainSight never writes to a document you point it at. That is not a promise made in a readme: a structural test reads the whole program's source, grants each part the ways of writing it needs by name and fails the build on any other it can see; only the two parts that write its own files, its settings and the release notes you ask it to import, are granted any. On Linux the Flatpak can read your home folder but not write to it. When you want to change something, it hands the document to the editor you chose and stands back.
PlainSight is free and stays free. There is no paid tier, no licence key and no feature held back behind a donation. If it has shown you something you needed to see, a contribution supports its maintenance and continued development. The same button sits in the window's own bottom tray.