django-wiki is a reusable Django application that implements a complete multi-user wiki engine. The core data model is a tree of URLPath nodes (django-mptt) that map to Article objects, each with a chain of ArticleRevision records containing title, Markdown content, author, IP, and soft-delete/lock state. The application exposes Django views for article create/edit/move/merge/history/search/diff/delete/restore, and enforces per-article permissions modeled like Unix file permissions (owner/group/others read/write) with recursive inheritance. It is installed into a host Django project via INSTALLED_APPS and URL includes, not run as a standalone service. Author edits flow through forms into new revisions, cached rendered HTML is invalidated on save, permission checks gate read/write operations, and notifications are triggered on changes.