second-brain-lint

# Lint the vault Structural rot is silent. Nothing errors, nothing crashes, the vault just slowly stops answering questions well because a third of its pages are unreachable. Linting is the only thing that catches it before the owner does. ## Core rule Report before repairing. Fix the mechanical problems automatically, but never delete or merge a page without listing it first and getting a yes, because the owner may have written it by hand. ## Workflow 1. **Inventory.** Count pages by type. Build the link graph by parsing every `[[wikilink]]`. 2. **Broken links.** Links pointing at pages that do not exist. Distinguish two cases: a typo or rename, which you fix, and a genuine gap, which goes into `index.md` under Gaps. 3. **Orphans.** Pages with no inbound links. For each, either find where it should be linked from and add the link, or flag it as a candidate for deletion. 4. **Stubs.** Pages under roughly 40 words with no links. Usually a failed ingest. Flag for re-ingest from the original source in `raw/`. 5. **Schema.** Missing or malformed frontmatter, wrong `type`, missing dates, tags outside the existing vocabulary. 6. **Near-duplicates.** Pages with very similar titles or aliases. Propose merges; do not perform them unsolicited. 7. **Index drift.** Pages missing from `index.md`, index entries pointing nowhere. 8. **Repair**, then append the run to `log.md`. ## Output format ``` Vault: <n> pages (<n> sources, <n> concepts, <n> entities, <...