Review Walkthrough

Generate a self-contained HTML walkthrough of the current branch, with the final diff split into logical steps, explanations, and critical review findings. Choose the grouping and reading order for comprehension; commit order need not dictate either. Invoke as /review-walkthrough:review-walkthrough in Claude Code or $review-walkthrough in Codex.

Capture the branch diff

Respect a user-specified base. Otherwise, use the current open PR's base when PR metadata is available. Without a PR, discover the repository's default branch from git symbolic-ref --quiet --short refs/remotes/origin/HEAD or the configured remote's equivalent. Do not assume it is main. If the selected base is missing or ambiguous, ask for it rather than silently choosing another branch.