If you don’t ever builded a post on OGS, I will teach you! Go to the home page and press (+start new topic) button.
may I change “builded” to “created” (or built at least) in your title?
A topic or a thread instead of a “post”, a post can be a simple answer in a thread.
And the category “meta” could be more appropriate as “general go discussion”.
build (present) → built (past) is an interesting conjugation.
The only comparison I can think of is gild → gilt, but these days I think gild → gilded is more common.
There’s also British English spell → spelt (cf. American English spell → spelled), and learn → learnt (cf. A.E. learn → learned), but these examples are a bit different is that the present tense doesn’t have that final D.
teach → taught is also similar. There’s also shoot → shot etc., but in that case the final T was there to begin with.