This is also one of my fears, and my strategy has been openness - I share my analysis/code with colleagues/Github/as supplement. Maybe they can spot errors or reuse some of it, and I feel that there is some "protection" in it
Does it require use of an "official" programming language and libraries, that are guaranteed to be maintained? Is Turbo Pascal for MS-DOS still supported? That's what I used for my dissertation, in 1993.
It's a far cry beyond what's expected in branches of science that are not mainly about programming.
Many folks have messed up simple algorithms before.