Sturmbot 1.9 install for Day of Defeat Steam - Version 2. - This is the latest version of Sturmbot for dod Steam v1.3. Updated in October 2019. This is a windows installer package if you need a manual zip read more here.
Sturmbot 1.7b 11b is the latest package for Steam Day of Defeat 1.3.
Warning this package is a manual install and difficult.
This download was the only Source code I know of. I think it came from the Bot United forums a long time ago.
From the readme... "Sturmbot 1.6 is a "bot" plugin for the Half-Life mod, Day of Defeat version 1.0 or greater (called DOD from now on)." Use this for the latest steam dod version 1.3 SteamPipe.