Automating media server storage reclamation, Maintainerr is an open-source library maintenance platform that identifies unwatched, abandoned, or stale movies and shows across Plex, Jellyfin, and Emby and clears them on a schedule. Storage drives fill up rapidly when household members request four-season series or high-bitrate films, watch a single episode, and abandon the rest indefinitely. Instead of forcing administrators to audit disks by hand, the rule engine evaluates metadata from your media server alongside Tautulli watch histories, Seerr and Ombi request records, and Radarr, Sonarr, or Sportarr profiles every eight hours. Matching items enter a staging collection that syncs back to your media server home screen as a Leaving Soon row, complete with dynamic poster overlays displaying the exact removal date so viewers have a grace period to finish watching. Before enabling any destructive workflow, you can run the Test Media inspector against any movie or episode to preview rule evaluations and protect favorites with global or per-collection exclusions. Once the countdown expires, the collection handler deletes or unmonitors files, updates import-list exclusions so automated lists never re-download removed titles, clears orphaned requests in Seerr and Ombi, removes leftover sidecar folders, and dispatches alerts through Discord, Slack, Telegram, Pushover, Gotify, Email, or webhooks. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.