Query Google NotebookLM notebooks for source-grounded

Blog NotebookLM: Source-Grounded Research from Your Documents

Query Google NotebookLM notebooks directly from Claude Code for citation-backed answers from Gemini. Each question opens a headless browser session, retrieves the answer from your uploaded documents, and closes. Responses are source-grounded model answers, not proof of truth: uploaded documents may be primary or secondary, and the answer can still omit context.

Answers provide usable provenance only when the returned citation identifies a verifiable underlying source. Record a stable source URL and a publication, study-period, or retrieval date when that detail affects verification or interpretation. Use the underlying source title as the inline citation. Do not cite the private NotebookLM URL as the bibliography entry for public content.

Quick Reference

Command	What it does
/blog notebooklm ask <question>	Query a notebook for source-grounded answers
/blog notebooklm discover <url>	Smart-discover notebook content before cataloging
/blog notebooklm library list	List all notebooks in library
/blog notebooklm library add <url>	Add a notebook to library
/blog notebooklm library search <query>	Search notebooks by keyword
/blog notebooklm library remove <id>	Remove a notebook from library
/blog notebooklm setup	One-time Google authentication (browser visible)
/blog notebooklm status	Check authentication status
/blog notebooklm cleanup	Clean browser state (preserves library)

Prerequisites

• Google account with NotebookLM access
• Python 3.11+ (venv managed automatically by run.py)
• Google Chrome (installed automatically on first run via Patchright)
• One-time authentication setup (interactive Google login in visible browser)

Use the run.py Wrapper

Call scripts only through the run.py wrapper: python3 scripts/run.py [script]:

# CORRECT:
python3 scripts/run.py auth_manager.py status
python3 scripts/run.py ask_question.py --question "..."

# Do not call files under scripts/ directly. The wrapper owns venv setup.

The run.py wrapper automatically creates .venv, installs dependencies, sets up Chrome, and executes the target script.

Auth Check (Gate Pattern)

Before any query operation, check authentication:

python3 scripts/run.py auth_manager.py status

• If authenticated: proceed with the query
• If not authenticated: inform user and guide to setup: "NotebookLM requires Google login. Run /blog notebooklm setup to authenticate."
• When called internally (from blog-write or blog-researcher): return silently with no error if not authenticated. Never block the writing workflow.

Setup Workflow

For /blog notebooklm setup:

# Opens a visible browser for manual Google login (one-time)
python3 scripts/run.py auth_manager.py setup

Tell the user: "A browser window will open. Please log in to your Google account." Authentication persists via browser profile + cookie injection (hybrid approach).

Other auth commands:

python3 scripts/run.py auth_manager.py status   # Check auth
python3 scripts/run.py auth_manager.py reauth   # Re-authenticate
python3 scripts/run.py auth_manager.py clear     # Clear all auth data

Query Workflow

For /blog notebooklm ask <question>:

Step 1: Check Auth

Run auth check (see gate pattern above). If not authenticated, guide to setup.

Step 2: Resolve Notebook

Determine which notebook to query:

• If --notebook-url provided: validate it is a NotebookLM notebook URL, then use it
• If --notebook-id provided: look up in library
• If neither: use active notebook from library
• If no active notebook: show library and ask user to select

Step 3: Ask the Question

# Basic query (uses active notebook)
python3 scripts/run.py ask_question.py --question "Your question here"

# Query specific notebook by ID
python3 scripts/run.py ask_question.py --question "..." --notebook-id notebook-id

# Query by URL directly
python3 scripts/run.py ask_question.py --question "..." --notebook-url "https://..."

# JSON output (for internal/programmatic use)
python3 scripts/run.py ask_question.py --question "..." --json

# Show browser for debugging
python3 scripts/run.py ask_question.py --question "..." --show-browser

Step 4: Analyze and Follow Up

Every response ends with a follow-up prompt. Required behavior:

1. STOP: do not immediately respond to the user
2. ANALYZE: compare the answer to the user's original request
3. IDENTIFY GAPS: determine if more information is needed
4. ASK FOLLOW-UP: if gaps exist, immediately ask a follow-up question
5. REPEAT: continue until information is complete
6. SYNTHESIZE: combine all answers before responding to the user

Smart Discovery Workflow

For /blog notebooklm discover <url>:

When adding a notebook without knowing its content, query it first:

# Step 1: Discover content
python3 scripts/run.py ask_question.py \
  --question "What is the content of this notebook? What topics are covered? Provide a complete overview briefly and concisely" \
  --notebook-url "<URL>"

# Step 2: Add with discovered metadata
python3 scripts/run.py notebook_manager.py add \
  --url "<URL>" \
  --name "<Based on content>" \
  --description "<Based on content>" \
  --topics "<Extracted topics>"

Do not guess descriptions; discover or ask the user.

Library Management

# List all notebooks
python3 scripts/run.py notebook_manager.py list

# Add notebook (all params required -- discover or ask user!)
python3 scripts/run.py notebook_manager.py add \
  --url "https://notebooklm.google.com/notebook/..." \
  --name "Descriptive Name" \
  --description "What this notebook contains" \
  --topics "topic1,topic2,topic3"

# Search by keyword
python3 scripts/run.py notebook_manager.py search --query "keyword"

# Set active notebook
python3 scripts/run.py notebook_manager.py activate --id notebook-id

# Remove notebook
python3 scripts/run.py notebook_manager.py remove --id notebook-id

# Library statistics
python3 scripts/run.py notebook_manager.py stats

Internal API (for blog-write / blog-researcher)

When invoked as a Task subagent from blog-write or blog-researcher:

Input (provided by calling skill):

• question: Research question relevant to the blog topic
• notebook_id or notebook_url: Which notebook to query
• context: "internal" (signals graceful fallback mode)

Process:

1. Check auth status: if not authenticated, return empty result silently
2. Query the notebook with the research question
3. Parse and return structured response

Output (returned to calling skill):

### NotebookLM Research
- **Source:** [Notebook name]
- **Question:** [What was asked]
- **Answer:** [Source-grounded response from user's documents]
- **Underlying Source:** [Public source URL or document identifier]
- **Underlying Source Date:** [Publication date or retrieval date]
- **Source Quality:** [Tier 1-3 after classifying the underlying document]

Graceful fallback: If auth is missing or query fails, return immediately with no error. The calling workflow continues with WebSearch-based research. Never block blog-write or blog-rewrite because NotebookLM is unavailable.

Data Storage

All data stored inside the skill directory:

• data/library.json: Notebook metadata and library
• data/auth_info.json: Authentication status
• data/browser_state/: Chrome profile with cookies

Security: All data directories are gitignored. Never commit auth or browser state.

Browser lifecycle and authenticated-context isolation are centralized in scripts/browser_session.py. Command scripts must use that helper instead of opening an additional persistent profile or copying cookies into another file.

Error Handling

Error	Resolution
Not authenticated	Run /blog notebooklm setup
ModuleNotFoundError	Always use run.py wrapper
Browser crash	cleanup_manager.py --confirm --preserve-library, then re-auth
Rate limit (50/day)	Wait until midnight PST or switch Google account
Notebook not found	Check with notebook_manager.py list
Query timeout (120s)	Retry with simpler question or --show-browser to debug
MCP unavailable (internal)	Return silently: writing workflow uses WebSearch

Limitations

• No session persistence (each question = new browser session)
• Rate limits on free Google accounts (50 queries/day)
• Manual upload required (user must add docs to NotebookLM web UI)
• Browser overhead (few seconds per question for launch + teardown)
• Local Claude Code only (not available in web UI)

Reference Documentation

Load on-demand: do NOT load all at startup:

• references/commands.md: Full CLI commands, parameters, and workflow patterns
• references/troubleshooting.md: Error solutions, recovery procedures, debugging