which classic HM has the best homebrew/modding tools?

Classic Hitman Games
1

title says it all. i have a campaign mod i wanna make but i cant tell which game would be best for it

2

Blood Money by far. There’s even a level editor for it now I’ve been playing with, though, sadly not much documentation.

3

There is c47edit for codename 47 and bmedit for blood money. The codename 47 one is probably more mature at the moment.