Second Brain — Lint

Health-check the wiki and report issues with actionable fixes.

Audit Steps

Run all checks below, then present a consolidated report.

1. Broken wikilinks

Scan all wiki pages for [[wikilink]] references. For each link, verify the target page exists. Report any broken links.

# Find all wikilinks across wiki pages
grep -roh '\[\[[^]]*\]\]' wiki/ | sort -u

Cross-reference against actual files in wiki/.

2. Orphan pages

Find pages with no inbound links — no other page references them via [[wikilink]].

For each .md file in wiki/sources/, wiki/entities/, wiki/concepts/, wiki/synthesis/:

Extract the page name (filename without extension)
Search all other wiki pages for [[Page Name]]
If no other page links to it, it's an orphan

3. Contradictions

Read pages that share entities or concepts and look for conflicting claims. Flag when:

Two source summaries make opposing claims about the same topic
An entity page contains information that conflicts with a source summary
Dates, figures, or factual claims differ between pages

4. Stale claims

Cross-reference source dates with wiki content. Flag when:

A concept page cites only old sources and newer sources exist on the same topic
Entity information hasn't been updated despite newer sources mentioning that entity

5. Missing pages

Scan for [[wikilinks]] that point to pages that don't exist yet. These are topics the wiki mentions but hasn't given their own page. Assess whether they warrant a page.

6. Missing cross-references

Find pages that discuss the same topics but don't link to each other. Look for:

Entity pages that mention concepts without linking them
Concept pages that mention entities without linking them
Source summaries that cover the same topic but don't reference each other

7. Index consistency

Verify wiki/index.md is complete and accurate:

Every page in wiki/sources/, wiki/entities/, wiki/concepts/, wiki/synthesis/ has an index entry
No index entries point to deleted pages
Entries are under the correct category header

8. Data gaps

Based on the wiki's current coverage, suggest:

Topics mentioned frequently but lacking depth
Questions the wiki can't answer well
Areas where a web search could fill in missing information

Report Format

Present findings grouped by severity:

Errors (must fix)

Broken wikilinks
Contradictions between pages
Index entries pointing to missing pages

Warnings (should fix)

Orphan pages with no inbound links
Stale claims from outdated sources
Missing pages for frequently referenced topics

Info (nice to fix)

Potential cross-references to add
Data gaps that could be filled
Index entries that could be more descriptive

For each finding, include:

What: description of the issue
Where: the specific file(s) and line(s)
Fix: what to do about it

After the Report

Ask the user:

"Found N errors, N warnings, and N info items. Want me to fix any of these?"

If the user agrees, fix issues and report what changed.

Log the lint pass

Append to wiki/log.md:

## [YYYY-MM-DD] lint | Health check
Found N errors, N warnings, N info items. Fixed: [list of fixes applied].

When to Lint

After every 10 ingests — catches cross-reference gaps while they're fresh
Monthly at minimum — catches stale claims and orphan pages over time
Before major queries — ensures the wiki is healthy before you rely on it for analysis

Related Skills

/second-brain-ingest — process new sources into wiki pages
/second-brain-query — ask questions against the wiki