Mubsub (NodeBB fork)

Mubsub is a pub/sub implementation for Node.js using MongoDB capped collections and tailable cursors. This fork (mubsub-nbb, published as @nodebb/mubsub) updates the original package for compatibility with mongodb 3.x driver. Version 1.6.1 is the latest stable release, maintained sporadically by NodeBB. It allows publishing events as documents into capped collections and supports event filtering via MongoDB queries. Key differentiators: leverages MongoDB's native tailable cursors for real-time notifications, supports flexible channel configuration (size, max, retry interval), and does not require additional infrastructure beyond MongoDB.