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Audit Trail is a plugin to keep track of what is going on inside your blog by monitoring administration functions.

Emails you whenever a change to a post or page is made.

Audit trail and git-style diff viewer for every file change made through the WordPress plugin and theme file editor.

Adds a persistent diff viewer to the Block Editor sidebar, showing live changes against the last saved revision with per-block highlights.

Diff Domain New Tab checks your external links and open in new tab.