Overview: File activity and notifications
File activity mechanisms report time, coordinate concurrent access and notify applications of observed changes.
A timestamp, an open-handle conflict and a change event describe different evidence. None is a universal declaration that an import is complete. This branch explains what each mechanism reports so library scanning can relate observed activity to the current readable file state.
File timestamps
File timestamps record particular kinds of activity, with meanings and precision that depend on the operating system and file system.File locking
File locks and open-handle sharing rules coordinate concurrent operations, while permissions and file completeness remain separate questions.File system change notifications
File-system notifications report observed changes with platform-specific limits, so a trustworthy library inventory also needs reconciliation.