Retain markdown on Clipboard?

[ComplexPoint]

But if the issue is to paste a markdown link (item name and item url)

1. Copying from OmniFocus, and
2. Pasting into Dynalist running in Firefox

Then I would suggest that you copy the OmniFocus item using this script:

Copy as Markdown Link

A single keystroke (I happen to use ⌘⌥M) to copy selected items as Markdown links from a variety of browsers and other applications. This is a working draft of a group containing a main macro and a number of supporting sub-macros: A main macro defining a single keystroke for use in a variety of different applications: Copy as Markdown link various sub-macros (not stand-alone - they are called by the main one) with the bundle identifier names of specific apps. The main macro: can get MD li…

the latest version of which (use the green Code button to download) is always at:

RobTrew/copy-as-md-link: macOS Keyboard Maestro macro group – single keystroke to copy MD links from different applications.