I get the use case, but realistically this type of tool is going to be used by HR right before they fire an employee, or as a step in the process to firing an employee.
Not really. Employees migrate companies willingly as well.
On this idea, its very specific to handover which is a miss I feel. It should be about documenting right from the start, not when someone is leaving the company.
I've read at-least 4-6 books related to startups, business, habit building etc.. Majority of them could be a blog or few blogs. Sometime I skim through most of the pages to avoid the repetition of the concepts.