Adding Notes to Second Brain

Add content to the knowledge base with proper frontmatter, tags, summaries, and wiki-links.

Content Type Routing

Detect type from URL, then load the appropriate reference file.

YouTube Classification

YouTube URLs require sub-classification before processing:

1. Known podcast channel? → references/content-types/podcast.md
2. Known talk channel OR conference title? → references/content-types/talk.md
3. Tutorial signals? → references/content-types/youtube.md with isTechnical: true
4. Default → references/content-types/youtube.md

See references/content-types/youtube.md for full classification logic and channel lists.

Scripts Reference

Only use scripts that fetch external data or perform complex processing:

Do NOT use scripts for trivial operations — do them inline:

• Author check: Glob with content/authors/*{lastname}*.md
• Frontmatter: Write YAML directly
• Tag lookup: Grep or knowledge from prior notes

Workflow Phases

Phase 1: Type Detection → Route to content-type file
Phase 2: Parallel Metadata Collection → Per-type agents
Phase 3: Author Creation → See references/author-creation.md
Phase 4: Content Generation → Apply writing-style, generate body
Phase 4.25: Diagram Evaluation → REQUIRED visual assessment with logged outcome
Phase 4.5: Connection Discovery → Find genuine wiki-link candidates (if any exist)
Phase 5: Quality Validation → Parallel validators
Phase 6: Save Note → Write to content/{slug}.md with link density report
Phase 7: MOC Placement → Suggest placements + check MOC threshold
Phase 8: Quality Check → Run pnpm lint:fix && pnpm typecheck

Phase 1: Type Detection & Dispatch

1. Detect type from URL using the Content Type Routing table above (no script needed)
2. Load the content-type reference file for detailed handling
3. Detect isTechnical flag (see content-type file for criteria)

Phase 2: Metadata Collection

Spawn parallel agents as specified in the content-type file. Each file lists:

• Required scripts to run
• Agent configuration
• Special handling notes

If isTechnical: true: Also spawn code extraction agent (see references/code-extraction.md).

Phase 3: Author Creation

For external content, check if author exists:

Glob: content/authors/*{lastname}*.md

• Match found: Use existing slug
• Partial match: Use AskUserQuestion to confirm identity
• No match: Create new author per references/author-creation.md

Phase 4: Content Generation

1. Load writing-style skill (REQUIRED): Read .claude/skills/writing-style/SKILL.md
2. Load linking philosophy (REQUIRED): Read .claude/skills/adding-notes/references/linking-philosophy.md
3. If isTechnical: collect code snippets from Phase 2
4. Compile frontmatter using template from content-type file
5. Generate body with wiki-links (see Phase 4.5 for connection discovery)

Tags: 3-5 relevant tags. Use tags you've seen in prior notes or Grep for similar content to find existing tags.

Summary: Frame as a core argument, not a description. What claim does this content make?

Phase 4.25: Diagram Evaluation (REQUIRED)

1. Load references/diagrams-guide.md
2. Apply the decision tree based on content type priority
3. Log outcome (REQUIRED):
   • Adding: ✓ Diagram added: [mermaid-type] - [description]
   • Skipping: ✓ No diagram needed: [specific reason]

Phase 4.5: Connection Discovery

Load references/linking-philosophy.md and follow the discovery checklist:

1. Same-author check (highest priority): Grep pattern: "authors:.*{author-slug}" glob: "content/*.md"
2. Tag-based discovery: Grep pattern: "tags:.*{tag}" glob: "content/*.md" limit: 5
3. Evaluate: "Would I naturally reference this when discussing the topic?"

Only add genuine connections with explanatory context. Orphans are acceptable.

Phase 5: Quality Validation

Spawn parallel validators:

Wiki-link note: Readwise highlights (content/readwise/) are excluded from Nuxt Content and won't resolve as valid wiki-links. Use plain text or italics for books/articles that only exist in Readwise.

If issues found: Use AskUserQuestion to offer: Fix issues / Save anyway / Cancel. If no issues: Log "✓ Validation passed" and proceed.

Phase 6: Save Note

Generate slug inline: lowercase title, replace spaces with hyphens, remove special characters. Example: "Superhuman Is Built for Speed" → superhuman-is-built-for-speed

Save to content/{slug}.md. Confirm with link density status:

✓ Note saved: content/{slug}.md
  - Type: {type}
  - Authors: {author-slugs}
  - Tags: {tag-count} tags
  - Diagram: {diagram-status}
  - Wiki-links: {link-count} connections ({status})
    - [[link-1]] (why: {context})
    - [[link-2]] (why: {context})

Diagram status: Added: [type] - [description] or None: [reason]

Link density status:

• {link-count} >= 3: "well-connected"
• {link-count} = 1-2: "connected"
• {link-count} = 0: "standalone" (fine when no genuine connections exist)

Phase 7: MOC Placement (Non-blocking)

See references/moc-placement.md for detailed workflow:

1. Suggest existing MOC placement via cluster script
2. Check if any tag exceeds 15-note threshold for new MOC creation

Phase 8: Quality Check

Run linter and type check to catch any issues:

pnpm lint:fix && pnpm typecheck

If errors are found, fix them before completing the task.

Error Handling

Reference Files