Auto-Properties Plugin
Obsidian Plugin. TypeScript
Details
Auto-properties is a Plug-in for Obsidian that allows you to create automatically-updating properties based on the contents of your notes + rules you define.
I use it for my Obsidian-based Project Management System.
More
https://github.com/aarongilly/obsidian-auto-properties
It will be on Obsidian’s community plugins page when they get through their quite extensive backlog of plugin submissions.