Interesting. I think the lesson is to not chase Kodachi as it lays down multiple groundfire patches. Also, Darts may have helped.

So what to do? Sit in your base wait for the kodas to suicide into you while your opponent takes the map? Good plan!

Kodachis have no chance if they don't oneshot Darts.
Darts take a little time to burn to death so if the Kodachi is driving straight into the Dart, the Dart will get a shoot off which should be enough for other units to catch it.

Not finishing that 98% complete solar may also have been a contributing factor here (would have given the equivalent of >100 metal).

I do find the new Kodachi amazingly good as a base raider (it's the Halberd of base raiders! a best-in-class unit) and somewhat mediocre as an anti-unit raider (due to how micro intensive it is to use well, its low DPS and the limited terrain it functions on).