Forbidden is bad sign, tool is not a problem, the problem is a non requested PR, large and without related issue. File read by agent himself (AGENTS.md or CONTRIBUTING) that force to have a issue first, limited diff move complexity to contributor.

Agree that there will be more solutions to counteract this if it's here to stay.

Also agree about PRs without non-related issues because some repositories in the list also say so (please raise an issue first etc)

Unfortunately some maintainers will still be wary of it and our answers can't speak for all of them. Even pre-AI, some open-source did not mean open-contribution. They just treated it as "ok here's the source, enjoy"