The goal was simple: .
HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\FileExts\<.ext>\UserChoice userchoice hash
Instead of hardcoding hash = sha256(data) , you build a small abstraction layer: The goal was simple:
User selects "Always use this app" for a file type, but the next time the file is opened, Windows asks again. the archival systems
But for the remaining 10% – the power tools, the archival systems, the password managers, the decentralized identity platforms – giving the user a transforms a rigid cryptographic primitive into a flexible, user-respecting feature.