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.

It would be more useful if it trained on input from the fired person’s whole tenure, e.g. reading their slack messages or something… if the quality of the product depends on cooperation of the person being replaced then it’s gonna be an uphill battle.

Yeah the paradox here is that employees on their way out are less likely to be forthcoming in sharing their knowledge, while current employees aren’t super incentivized to be thorough, as it functionally makes them easier to get rid of.

So the employer either needs to be surveillant and somewhat hostile, taking data from Slack messages etc. Or they need to have a culture which prioritizes documentation as a part of daily routine.

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.

... And? Firms are profit maximizers. It's usually good when they fire people.