Periodic vault-hygiene sweep agent

A skill that walks the entire vault and proposes hygiene operations: rename files that violate the naming convention, move misfiled notes, remove duplicates, fix broken bidirectional links, archive items older than N months with no incoming references. Always proposes a diff first; applies only on confirmation.

A vault that grows past ~5K files quietly rots — links break, naming drift accumulates, duplicates multiply. A founder running an AI-native operations cohort admitted: "Hygiene is everyone's responsibility, but rarely happens — even I'm bad at it." A periodic agent-driven sweep is the only realistic way to keep a 15-20K file vault navigable.

1. Codify your naming convention as a markdown file in the vault root.
2. Write a world-clean skill that takes inputs: naming convention path, vault root, dry-run flag.
3. Steps the skill performs: scan all files; group by violations (bad name, missing frontmatter, broken link, duplicate hash); emit a proposed-changes report; on confirm, apply with bidirectional-link preservation (Obsidian backlink syntax).
4. Run dry-run weekly; apply quarterly.
5. Always commit the vault before running. This is a recovery point.
6. Keep an audit log of what the skill renamed/moved — future-you needs it.

• Auto-apply without preview eats important files. The skill must always emit a diff and demand confirmation; the team that skipped this lost half a vault to a Dropbox-sync cascade.