An offline editor for Dustforce replays, largely based on dustkid.com's replay composer.
pip install dusted
For extra features, copy plugin/tas.as to ~dustforce/user/script_src, compile as an in-game plugin, and enable it.
On linux, the program unbuffer is required, which can be installed with sudo apt-get install expect (or equivalent depending on your distribution).
Run the editor with
python -m dusted
or, if the python scripts directory is on the PATH
dusted