I think the moat depends on how long it takes for an agent to ingest the entire commit history and product documentation into context on the fly. At the rate models are improving, seeing the reasoning chain of an outdated model that led to a commit that warrants post-hoc review (likely becuase of a bug) would mainly be useful for root cause analysis more than for insight into what to do next... but chances are the newer model would have been able to infer it from local context anyway.

It also creates a challenge with respect with the embedding model chosen and how future proof it turns out to be.