Are you talking about evidence that LLM contributions are harmful, or evidence that there are any? The former is unnecessary, as this is not an evangelism project, it's for people who already believe LLMs are bad. For the latter, I think the project is aimed at people who are already plugged into the issue, or suffers from the usual mistake of thinking everyone is plugged into a specific issue. In any case, it takes about five seconds to search for "claude" in the main vim repo's PRs and find that evidence.