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node 'node-slave01' 
 include repo::git
 include fun::cmatrix

node 'node-slave02' 
 include repo::hg
 include fun::toilet

node 'node-slave03' 
 include fun::rup
 include repo::svn
 include fun::cmatrix

node 'node-slave04' 
 include repo::git
 include repo::hg
 include repo::svn
 include fun::cmatrix
 include fun::toilet

node /node-slaved+/ 
 include lamp
 include test
 include fun::rup
 include sup

So everything in /node-slaved+/ doesn't run. If I take the sup module and put it under any of the 4 nodes, it runs after I write sudo puppet agent --test, but not if it's under the regexp.

How do I do it if I want to have certain nodes do certain things, but there are some commands that I want all of them to do? Writing include sup under every node seems extremely annoying.

Puppet matches one node and once it does that it stops. FQDN is highest and it works down to default. See matching section - https://puppet.com/docs/puppet/4.10/lang_node_definitions.html.

One way to do it is to have just your regex node and then use a case statement for things that are unique to each node

node /node-slaved+/
include lamp
include test
include fun::rup
include sup

case $::hostname
'node-slave01':
include repo::git
include fun::cmatrix

node-slave02':
include repo::hg
include fun::toilet