AI-assisted PRs tend to expand beyond the original request. cursor-pr-discipline is a free set of Cursor Project Rules (.mdc files) that help keep PRs scoped, reviewable, and human-decided. Free Pack on GitHub includes: - no-unrequested-changes.mdc - one-pr-one-topic.mdc - classify-before-merging.mdc Pro Pack v0 on Gumroad ($29) adds execution result triage, AI review triage, and human merge decision log templates.