> recognize and parse any and all ipv4 and ipv6 addresses and CIDRs contained within it (these may be surrounded by random words or symbols like commas), then return them as a list'

Did I miss the generated code and test cases? I would like to see how complete it was.

For example, for IPv4 does it only handle quad-dotted IP addresses, or does it also handle decimal and hex formats?

For that matter, should it handle those, and if so, where there clarification of what exactly 'all ipv4 ... addresses' means?

I can think of a lot of tricky cases (like 1.2.3.4.5 and 3::2::1 as invalid cases, or http://[2001:db8:4006:812::200e] to test for "symbols like commas"), and would like to see if the result handles them.