We're big believers that the C4 model gives a good lightweight approach and guidance for those who struggle to articulate the complexities of software.

Currently the code checks work through manual set up and won't remove all doc rot for sure, but indicates when drift is happening. This helps both direct to what code/resources are of interest (onboarding new hires), and also checks it still exists in the source control. More smarter checks to continue removing doc rot are planned.