Sorry, that was dumb, re Fossil. I was tired and know the Sqlite/Fossil community are tight with the Tcl community (since the Fossil scripting language was once Tcl, and now I believe a derivative of Tcl now, called TH1), so I got confused with lack of coffee and just waking up.

https://www.fossil-scm.org/index.html/doc/trunk/www/th1.md

The type situation is cool. I know little of CLR and .NET, but will definitely check out this code. This sounds wonderful, good on you and your community! Perhaps I will play.