Technical Support for Orphaned Modules

Software might start out with a promising code base but due to institutional or consortial priorities have to be delayed or dropped.

If AI was to develop code based an initial code repository, how would one ensure interoperability of the code across new platforms?
How can one create checks to ensure the AI doesn't hallucinate and write code that interacts with another code base that doesn't exist?
What sort of baseline is needed to ensure there isn't ambiguity in the codebase that could allow the AI to develop the code in a way that increases technical overhead?
How might AI generated code be migrated to newer versions of a programming language or software stack
How can an AI code avoid being overfitted to the orpanhed code on which it relies for a baseline?

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