Q1. What is the problem that you are trying to solve?
Some macOS clipboard manager (for instance https://github.com/p0deje/Maccy can ignore items thanks to their NSPasteboard type. So setting a special value for this this (curretly “org.chromium.source-url” for chrome, according to "pasteboard viewer) would avoid saving password in those non secured clipboard managers.
Q2 - Who is impacted?
MacOs users of clip board managers filtering clipboard item on their NSPasteboard type.
Q3 - Why is it important and/or urgent?
All those users have to clean their clipboard history by hand, which is error prone, to avoid leaking password into unsecured software.
Q4 - What is your proposed solution? (optional)
Set the NSPasteboard of password to “org.nspasteboard.ConcealedType”