lint

Lint the wiki in the current directory. Output a report grouped by check type.

For each .md file under wiki/ (skip wiki/log.md):

1. Frontmatter validation

   • YAML frontmatter exists between --- markers
   • Required fields: title, type, created, last_updated
   • confidence ∈ {high, medium, low} if present
   • ttl matches ^\d+d$ or is null
   • created / last_updated match YYYY-MM-DD

2. Link integrity

   • Every [[wikilink]] resolves to an existing wiki page
   • Report broken links with file:line

3. Orphans

   • Count inbound [[references]] to each page
   • Pages with 0 inbound (except wiki/index.md) are orphans
   • Exception: synthesis pages linked from wiki/index.md

4. Backlinks section audit

   • Every page has a ## Backlinks heading (warn if missing)

5. Staleness

   • last_updated + ttl < today → stale
   • Skip pages with ttl: null

6. Source attribution

   • Pages with type ∈ {entity, concept, theme, capability, narrative, client, pattern} have non-empty sources:
   • Synthesis and comparison pages may have empty sources:

Output format:

=== Frontmatter ===
✗ wiki/entities/foo.md: missing required field 'type'

=== Links ===
✗ wiki/concepts/bar.md:15: broken link [[nonexistent]]

=== Orphans ===
⚠ wiki/themes/lonely.md: 0 inbound links

=== Staleness ===
⚠ wiki/entities/old.md: stale (last_updated 2025-01-01, ttl 90d)

=== Attribution ===
✗ wiki/entities/foo.md: type 'entity' requires non-empty sources:

=== Summary ===
N errors, M warnings (K pages checked)

If there are errors, suggest specific fixes — but do NOT auto-fix unless the user asks. Just report.

Do not invent issues. If the wiki is clean, print Healthy — 0 errors, 0 warnings.