Reusable workflows for outcome-aligned agents

Use when reviewing a pull request, branch, or set of code changes for correctness, security, performance, and style issues. Resolves a PR URL, PR number, branch name, or natural-language description into the actual diff, then produces an actionable in-chat review with severity-tagged comments grouped by category, plus concrete unified-diff patches for blockers.

OutcomeWalk a PR or branch and deliver an actionable, in-chat code review grouped by category (correctness, security, performance, style) with severity tags and concrete patches for blockers.