Source : http://lzone.de/blog/Puppet:%20List%20Changed%20Files
If you want to know which files where changed by puppet in the last days:
cd /var/lib/puppet
for i in $(find clientbucket/ -name paths); do
echo "$(stat -c %y $i | sed 's/\..*//') $(cat $i)";
done | sort -n
will give you an output like
[...]
2015-02-10 12:36:25 /etc/resolv.conf
2015-02-17 10:52:09 /etc/bash.bashrc
2015-02-20 14:48:18 /etc/snmp/snmpd.conf
2015-02-20 14:50:53 /etc/snmp/snmpd.conf
[...]