Migrate content IA (redirects + links + anchors)

Use this skill when pages move or rename under content/ and you must preserve old public URLs and/or fix cross-references. Work in phases; choose PR-scoped vs full-site mode per run.

Read first: CLAUDE.md / AGENTS.md (URL rules, vendored areas, external links, special cases) and hugo.yaml (permalinks, refLinksErrorLevel, disablePathToLower). For prose and link text, follow STYLE.md; for components, front matter, and link examples, follow COMPONENTS.md.

Related skills: research helps map moves and find inbound links; write commits minimal edits. Run this skill’s phases after the move is identified (or in parallel with research for large IA work).

Agent: required procedure (do not skip)