ST manager can be used to create and sign OS Packages and more to ease the usage of System Transparency.
Go version 1.19 or higher.
Either run go install system-transparency.org/stmgr@latest or clone
the repo and run go build.
stmgr is invoked with a command and a corresponding subcommand, for
example stmgr ospkg create. In this example, ospkg is the command
and create is the subcommand. See manual for more
details.