Second Brain Lint Agent Skill

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