ctxo-review-pr

name	ctxo-review-pr
description	Use when reviewing a PR, a diff, or recent changes, to get a full risk assessment in one call.

Review a PR with ctxo

1. get_pr_impact - single call: changed symbols + blast radius + co-change risk.
2. For any high-risk symbol it surfaces, follow up with get_why_context.
3. Summarize risk for the human: what breaks, what needs extra review, what has a bad history.