Generate a Review Walkthrough Guide

Analyze a git diff and produce a guide XML sidecar that self-review discovers next to its output file. The guide reorganizes the file tree from alphabetical order into named, ordered groups with rationales, gives each file a one-line description of its role in the change, and provides a review-level overview shown before the first file.

The guide asserts reading order, never review verdicts. It carries no severity, no confidence, no findings, and no comments — that is self-review-critique's job. This skill only answers one question: in what order, and with what orientation, should a human read this diff?

XML Reference

Non-obvious semantics (keep in sync with assets/self-review-guide-v1.xsd):