Todo.txt file format support for Zed.
Search and install "Todotxt" extension.
Clone this repo. Then open Zed, go to "Extensions" settings, click "Install dev extension" and select the directory containing this repository contents.
This repository comes with several Zed tasks which you can invoke to do some action with the current todo.txt file. For more info read this section.
If you'd like to override the default highlighting rules, read this section.