A better-faith response would be to point out an example of such an open source codebase OR tell why that specific set of restrictions (open-source, active production, primarily AI) is unrealistic.
For instance, one might point out that the tools for really GOOD AI code authoring have only been available for about 6 months so it is unreasonable to expect that a new project built primarily using such tools has already reached the level of maturity to be relied on in production.
You're perfectly capable of looking at the world around you. You're arguing in bad faith using a false dichotomy that I must be able to produce examples or my argument is not valid. You're trying to suck all the air out of the room and waste time.
Aside from that, I don't see how the collection of simple one-shot JavaScript wrappers (like "Extract URLs", "Word Counter", and "Pomodoro Timer") that you keep bringing up is related to your argument.
For instance, one might point out that the tools for really GOOD AI code authoring have only been available for about 6 months so it is unreasonable to expect that a new project built primarily using such tools has already reached the level of maturity to be relied on in production.