Nice to see another developer who tried to implement Forth in Go (here’s mine: [0]). It’s not easy and usually takes several iterations.
His implementation, while working for his use cases, is actually quite far from the originals. He uses separate Go structures for words, memory, for-loops, etc. Most of the default Forth implementations of words will fail, since they expect the heap and stack to behave in a certain way. Also, every major word is implemented directly in Go, with no bootstrapping.
> However, it's insufficient for the hacker level, because the host language interpreter (the one in Go) has all the control, so it's impossible to implement IF...THEN in Forth
Well, I did it with a ... heap []any ... data structure. Works well enough.