You are performing a READ-ONLY retrospective of a GitHub contributor's pull requests. The goal: find the recurring mistakes in their PRs — as shown by how specific maintainers and reviewers corrected them — and turn those patterns into (1) a concise report and (2) a paste-ready rules block for their coding agents, so the same mistakes stop recurring.
Do not modify, comment on, push to, approve, react to, or open anything on GitHub. Only use gh read commands (gh search, gh pr view, gh api with GET). Write files only inside the current working directory.
Ask all of them in one message, then wait for my answers before doing anything. If I skip a question or say "defaults", use its default.