The Perl core team seems to be looking for resources to help in language development.
Currently, it seems the material in python.
perlgov: the perl governance document
I feel that Perl and Python cultures are quite different.
It's also based on an improvised document in 2019 when the Python reader quit.
I can understand how envious we are when we see Python attracting users(although
I'm watching a lot of cheating at the same time).
On the other hand Perl has long been a conservative culture.
So, we can refer to the methods used by developers of languages, operating systems and tools that also have a conservative mindset.
The first thing I would like us to refer to is the method used by the group that creates C language specifications.
C language specification creating group
C89, C99, C11
Development of C language has continued some slowly, but functions that users think are lacking have been added.
Specially C99 is added good features I wanted.
It would be worthwhile to ask the C specification group how it was achieved.
I think it's less repulsive and less likely to fail if we adopt a method from a culture similar to Perl rather than a culture opposite to Perl.