There's never been a module named base_runtime.

@psabata good point, haven't noticed that, is fixed now

Missing articles: "It inspects the cache of the mbs-build tool..." but that sounds clunky, how about: "It queries information about previously built modules to fulfill build and runtime package dependencies."?

"preliminary" or "incomplete" rather than "dummy"?

"a new module", but because it's repetitive, how about "Create a new bootstrap module which ..."?

"This solution isn't preferred because it runs contrary to the idea putting only content into modules which is needed for its functionality." ?

Maybe mention the option of filtering out binary packages that are only needed for building, too?

Ohh wait, I misread that previously, like completely. "... isn't preferred *because it makes it at least very hard if not impossible to reproduce how a module was built at a later point."?

typo "important"

"during the compose phase"

"…the target packages and the maintainer…"

"target"