diff --git a/.gitignore b/.gitignore
index b3d0195dd..8d171d6c4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -111,4 +111,7 @@ assets/gen_typing_gif.py
 !/docs/
 /docs/*
 !/docs/hub/
-
+!/notebooklm/
+/notebooklm/*
+/notebooklm/.*
+!/notebooklm/agent-harness/
diff --git a/README.md b/README.md
index 73ad156d3..557e30495 100644
--- a/README.md
+++ b/README.md
@@ -708,6 +708,8 @@ cli-anything/
 ├── 🧜 mermaid/agent-harness/            # Mermaid Live Editor CLI (10 tests)
 ├── ✨ anygen/agent-harness/             # AnyGen CLI (50 tests)
 ├── 🖼️ comfyui/agent-harness/            # ComfyUI CLI (70 tests)
+├── 🧠 notebooklm/agent-harness/         # NotebookLM CLI (experimental, 21 tests)
+├── 🖼️ comfyui/agent-harness/            # ComfyUI CLI (70 tests)
 └── 🛡️ adguardhome/agent-harness/        # AdGuardHome CLI (36 tests)
 ```
 
diff --git a/notebooklm/agent-harness/ATTRIBUTION.md b/notebooklm/agent-harness/ATTRIBUTION.md
new file mode 100644
index 000000000..bb27d4bcb
--- /dev/null
+++ b/notebooklm/agent-harness/ATTRIBUTION.md
@@ -0,0 +1,29 @@
+# Attribution
+
+This harness adapts the CLI-Anything methodology for NotebookLM.
+
+## Acknowledgements
+
+- **CLI-Anything**
+  - Project: https://github.com/HKUDS/CLI-Anything
+  - Methodology: https://github.com/HKUDS/CLI-Anything/blob/main/cli-anything-plugin/HARNESS.md
+  - We follow its agent-native CLI conventions, including REPL-first design, JSON output, package layout, and test documentation patterns.
+
+- **notebooklm-py**
+  - Project: https://github.com/teng-lin/notebooklm-py
+  - PyPI: https://pypi.org/project/notebooklm-py/
+  - This harness is designed to interoperate with the installed `notebooklm` CLI distributed by notebooklm-py.
+
+- **Google NotebookLM**
+  - Product help: https://support.google.com/notebooklm/answer/16206563
+  - NotebookLM is a Google product. This harness is unofficial and not affiliated with or endorsed by Google.
+
+## Design Boundary
+
+This project prefers composition over copying:
+
+- wrap the installed `notebooklm` CLI
+- document upstream dependencies and policies
+- avoid vendoring third-party NotebookLM implementation code into this repository
+
+If you extend this harness, preserve these acknowledgements and keep the unofficial / experimental disclaimer intact.
diff --git a/notebooklm/agent-harness/NOTEBOOKLM.md b/notebooklm/agent-harness/NOTEBOOKLM.md
new file mode 100644
index 000000000..c53731dab
--- /dev/null
+++ b/notebooklm/agent-harness/NOTEBOOKLM.md
@@ -0,0 +1,44 @@
+# NotebookLM: Project-Specific Analysis & SOP
+
+## Architecture Summary
+
+NotebookLM is a hosted Google research and content-generation product. Unlike the
+local GUI applications that CLI-Anything usually targets, this harness wraps an
+installed `notebooklm` command-line client that already manages authentication,
+source ingestion, chat, artifact generation, and downloads.
+
+This harness therefore behaves as a **service-style CLI wrapper**:
+
+1. Resolve the local `notebooklm` executable.
+2. Build explicit commands with notebook context where needed.
+3. Sanitize sensitive auth-related error output.
+4. Persist lightweight local session state for REPL convenience.
+
+## Backend Strategy
+
+- Prefer the installed `notebooklm` CLI over reimplementing NotebookLM internals.
+- Keep credentials outside the repository and outside test fixtures.
+- Treat this integration as experimental and unofficial.
+- Require explicit confirmation for destructive or high-impact operations.
+- Preserve clear attribution to CLI-Anything, notebooklm-py, and Google NotebookLM documentation.
+
+## Contribution Boundary
+
+This harness is designed to be safe for an upstream contribution review:
+
+- it wraps an installed community CLI instead of vendoring third-party NotebookLM code
+- it documents copyright and service-boundary concerns instead of implying official support
+- it limits automated verification to non-destructive smoke coverage unless a local authenticated session is intentionally used
+- it keeps end-to-end authenticated testing manual so secrets and account state stay out of CI and fixtures
+
+## Constraints
+
+- Depends on a valid local Google-authenticated NotebookLM session.
+- Depends on behavior provided by the installed `notebooklm` CLI.
+- Full authenticated end-to-end tests are manual by design.
+
+## References
+
+- CLI-Anything methodology: https://github.com/HKUDS/CLI-Anything
+- notebooklm-py project: https://github.com/teng-lin/notebooklm-py
+- Google NotebookLM help: https://support.google.com/notebooklm/answer/16206563
diff --git a/notebooklm/agent-harness/THIRD_PARTY_NOTICES.md b/notebooklm/agent-harness/THIRD_PARTY_NOTICES.md
new file mode 100644
index 000000000..dea35669f
--- /dev/null
+++ b/notebooklm/agent-harness/THIRD_PARTY_NOTICES.md
@@ -0,0 +1,26 @@
+# Third-Party Notices
+
+## notebooklm-py
+
+- Homepage: https://github.com/teng-lin/notebooklm-py
+- PyPI: https://pypi.org/project/notebooklm-py/
+- License: MIT
+
+This harness is intended to work with the `notebooklm` CLI provided by notebooklm-py.
+
+## Click
+
+Used for CLI command structure.
+
+## prompt-toolkit
+
+Used for REPL interaction helpers.
+
+## Important Boundary
+
+Google NotebookLM is a third-party online service. This harness is an unofficial
+integration layer and is not affiliated with Google. Users are responsible for:
+
+- complying with Google terms and product restrictions
+- protecting their own credentials and local auth state
+- respecting copyright for imported sources
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/README.md b/notebooklm/agent-harness/cli_anything/notebooklm/README.md
new file mode 100644
index 000000000..88fff930f
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/README.md
@@ -0,0 +1,112 @@
+# CLI-Anything NotebookLM Harness
+
+Experimental NotebookLM harness for CLI-Anything.
+
+This package wraps an installed `notebooklm` CLI and exposes a CLI-Anything-style
+interface for authentication checks, notebook selection, source management, chat,
+artifact generation, downloads, and sharing.
+
+## Status
+
+- Experimental
+- Community-maintained
+- Unofficial and not affiliated with Google
+
+## Requirements
+
+- Python 3.10+
+- An installed `notebooklm` command
+- A valid local NotebookLM login session
+
+## Install
+
+```bash
+cd notebooklm/agent-harness
+python3 -m pip install -e .
+```
+
+If the upstream NotebookLM CLI is not installed yet:
+
+```bash
+python3 -m pip install --user 'notebooklm-py[browser]'
+python3 -m playwright install chromium
+```
+
+## Run
+
+```bash
+# Show help
+cli-anything-notebooklm --help
+
+# Check auth state (wraps `notebooklm auth check`)
+cli-anything-notebooklm auth status
+
+# List notebooks
+cli-anything-notebooklm notebook list
+```
+
+## Run Tests
+
+```bash
+cd notebooklm/agent-harness
+python3 -m pytest cli_anything/notebooklm/tests -q
+python3 -m cli_anything.notebooklm.notebooklm_cli --help
+```
+
+## Command Groups
+
+| Group | Purpose |
+| --- | --- |
+| `auth` | login helpers and authentication checks |
+| `notebook` | list, create, and summarize notebooks |
+| `source` | inspect sources and add URL sources |
+| `chat` | ask questions and inspect history |
+| `artifact` | list artifacts and generate reports |
+| `download` | download generated artifacts |
+| `share` | inspect sharing status |
+
+## Common Workflows
+
+```bash
+cli-anything-notebooklm auth status
+cli-anything-notebooklm notebook list
+cli-anything-notebooklm source list --notebook nb_123
+cli-anything-notebooklm chat ask "Summarize the current notebook"
+cli-anything-notebooklm artifact generate-report --notebook nb_123
+```
+
+## For AI Agents
+
+- Prefer explicit notebook IDs with `--notebook` instead of relying on ambient state.
+- Use `--json` only on commands whose upstream `notebooklm` subcommand supports machine-readable output.
+- Treat NotebookLM auth state as sensitive local data and never print cookie or storage files.
+- Treat this harness as a thin wrapper around `notebooklm`, not a reimplementation of NotebookLM.
+
+## Acknowledgements
+
+This harness is inspired by the CLI-Anything methodology:
+https://github.com/HKUDS/CLI-Anything
+
+It is designed to work with the community-maintained `notebooklm` CLI from `notebooklm-py`:
+https://github.com/teng-lin/notebooklm-py
+
+NotebookLM is a Google product:
+https://support.google.com/notebooklm/answer/16206563
+
+This project is unofficial and not affiliated with Google.
+
+## Safety Notes
+
+- Do not commit local auth state into the repository.
+- Do not upload sensitive content without permission.
+- Respect copyright and service terms for imported sources.
+- Prefer review-oriented or read-only commands first when working inside a live notebook.
+- Treat sharing and artifact generation as user-impacting operations that deserve explicit intent.
+
+## References
+
+- CLI-Anything: https://github.com/HKUDS/CLI-Anything
+- CLI-Anything HARNESS.md: https://github.com/HKUDS/CLI-Anything/blob/main/cli-anything-plugin/HARNESS.md
+- notebooklm-py: https://github.com/teng-lin/notebooklm-py
+- notebooklm-py on PyPI: https://pypi.org/project/notebooklm-py/
+- Google NotebookLM help: https://support.google.com/notebooklm/answer/16206563
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/__init__.py b/notebooklm/agent-harness/cli_anything/notebooklm/__init__.py
new file mode 100644
index 000000000..c8601e771
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/__init__.py
@@ -0,0 +1,3 @@
+"""NotebookLM harness package."""
+
+__version__ = "0.1.0"
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/__main__.py b/notebooklm/agent-harness/cli_anything/notebooklm/__main__.py
new file mode 100644
index 000000000..fd1753810
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/__main__.py
@@ -0,0 +1,7 @@
+"""Module entry point for cli-anything-notebooklm."""
+
+from cli_anything.notebooklm.notebooklm_cli import main
+
+
+if __name__ == "__main__":
+    main()
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/core/__init__.py b/notebooklm/agent-harness/cli_anything/notebooklm/core/__init__.py
new file mode 100644
index 000000000..2c7cef76d
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/core/__init__.py
@@ -0,0 +1 @@
+"""Core modules for the NotebookLM harness."""
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/core/session.py b/notebooklm/agent-harness/cli_anything/notebooklm/core/session.py
new file mode 100644
index 000000000..995e6b01c
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/core/session.py
@@ -0,0 +1,42 @@
+"""Session persistence helpers for NotebookLM CLI context."""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+
+class Session:
+    """Persist the active notebook for REPL and one-shot commands."""
+
+    def __init__(self, session_file: str | Path | None = None):
+        if session_file is None:
+            session_file = Path.home() / ".cli-anything-notebooklm" / "session.json"
+        self.session_file = Path(session_file)
+        self.session_file.parent.mkdir(parents=True, exist_ok=True)
+        self._data = self._load()
+
+    def _load(self) -> dict:
+        if not self.session_file.exists():
+            return {"active_notebook": None}
+        try:
+            return json.loads(self.session_file.read_text(encoding="utf-8"))
+        except json.JSONDecodeError:
+            return {"active_notebook": None}
+
+    def _save(self):
+        self.session_file.write_text(
+            json.dumps(self._data, indent=2, ensure_ascii=True),
+            encoding="utf-8",
+        )
+
+    def get_active_notebook(self) -> str | None:
+        return self._data.get("active_notebook")
+
+    def set_active_notebook(self, notebook_id: str):
+        self._data["active_notebook"] = notebook_id
+        self._save()
+
+    def clear_active_notebook(self):
+        self._data["active_notebook"] = None
+        self._save()
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/notebooklm_cli.py b/notebooklm/agent-harness/cli_anything/notebooklm/notebooklm_cli.py
new file mode 100644
index 000000000..5da8612e6
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/notebooklm_cli.py
@@ -0,0 +1,282 @@
+#!/usr/bin/env python3
+"""NotebookLM CLI — Experimental NotebookLM wrapper for AI agents."""
+
+from __future__ import annotations
+
+import json
+import sys
+
+import click
+
+from cli_anything.notebooklm import __version__
+from cli_anything.notebooklm.core.session import Session
+from cli_anything.notebooklm.utils.notebooklm_backend import run_notebooklm
+
+_json_output = False
+_session: Session | None = None
+
+
+def get_session() -> Session:
+    global _session
+    if _session is None:
+        _session = Session()
+    return _session
+
+
+def emit(data, message: str = ""):
+    if _json_output:
+        click.echo(json.dumps(data, indent=2, default=str))
+    elif message:
+        click.echo(message)
+    elif isinstance(data, str):
+        click.echo(data)
+    else:
+        click.echo(json.dumps(data, indent=2, default=str))
+
+
+def handle_error(func):
+    def wrapper(*args, **kwargs):
+        try:
+            return func(*args, **kwargs)
+        except Exception as exc:  # pragma: no cover - scaffold behavior
+            if _json_output:
+                click.echo(json.dumps({"error": str(exc), "type": type(exc).__name__}))
+            else:
+                click.echo(f"Error: {exc}", err=True)
+            sys.exit(1)
+
+    wrapper.__name__ = func.__name__
+    wrapper.__doc__ = func.__doc__
+    return wrapper
+
+
+def resolve_notebook_id(notebook_id: str | None) -> str | None:
+    return notebook_id or get_session().get_active_notebook()
+
+
+@click.group(invoke_without_command=True)
+@click.option("--json", "use_json", is_flag=True, help="Output as JSON")
+@click.option("--notebook", "notebook_id", default=None, help="Active notebook ID")
+@click.pass_context
+def cli(ctx, use_json, notebook_id):
+    """NotebookLM CLI — Experimental NotebookLM wrapper for AI agents."""
+    global _json_output
+    _json_output = use_json
+    if notebook_id:
+        get_session().set_active_notebook(notebook_id)
+    if ctx.invoked_subcommand is None:
+        ctx.invoke(repl)
+
+
+@cli.command()
+def repl():
+    """Start a minimal REPL placeholder."""
+    click.echo(f"cli-anything-notebooklm v{__version__}")
+    click.echo("Experimental harness scaffold. Use --help to inspect command groups.")
+
+
+@cli.group()
+def auth():
+    """Authentication and login helpers."""
+
+
+@auth.command("status")
+@handle_error
+def auth_status():
+    """Check authentication status."""
+    emit(run_notebooklm(["auth", "check"], json_output=_json_output))
+
+
+@auth.command("login")
+@handle_error
+def auth_login():
+    """Open the browser login flow."""
+    emit(run_notebooklm(["login"], json_output=_json_output))
+
+
+@auth.command("check")
+@handle_error
+def auth_check():
+    """Run a lightweight authentication check."""
+    emit(run_notebooklm(["auth", "check"], json_output=_json_output))
+
+
+@cli.group()
+def notebook():
+    """Notebook management commands."""
+
+
+@notebook.command("list")
+@handle_error
+def notebook_list():
+    """List notebooks."""
+    emit(run_notebooklm(["list"], json_output=_json_output))
+
+
+@notebook.command("create")
+@click.argument("name")
+@handle_error
+def notebook_create(name):
+    """Create a notebook."""
+    emit(run_notebooklm(["create", name], json_output=_json_output))
+
+
+@notebook.command("summary")
+@handle_error
+def notebook_summary():
+    """Summarize the active notebook."""
+    emit(
+        run_notebooklm(
+            ["summary"],
+            notebook_id=resolve_notebook_id(None),
+            json_output=_json_output,
+        )
+    )
+
+
+@cli.group()
+def source():
+    """Source ingestion and inspection commands."""
+
+
+@source.command("list")
+@click.option("--notebook", "notebook_id", default=None, help="Notebook ID")
+@handle_error
+def source_list(notebook_id):
+    """List sources for a notebook."""
+    emit(
+        run_notebooklm(
+            ["source", "list"],
+            notebook_id=resolve_notebook_id(notebook_id),
+            json_output=_json_output,
+        )
+    )
+
+
+@source.command("add-url")
+@click.argument("url")
+@click.option("--notebook", "notebook_id", default=None, help="Notebook ID")
+@handle_error
+def source_add_url(url, notebook_id):
+    """Add a URL source."""
+    emit(
+        run_notebooklm(
+            ["source", "add", url],
+            notebook_id=resolve_notebook_id(notebook_id),
+            json_output=_json_output,
+        )
+    )
+
+
+@cli.group()
+def chat():
+    """Chat and history commands."""
+
+
+@chat.command("ask")
+@click.argument("prompt")
+@click.option("--notebook", "notebook_id", default=None, help="Notebook ID")
+@handle_error
+def chat_ask(prompt, notebook_id):
+    """Ask a question against a notebook."""
+    emit(
+        run_notebooklm(
+            ["ask", prompt],
+            notebook_id=resolve_notebook_id(notebook_id),
+            json_output=_json_output,
+        )
+    )
+
+
+@chat.command("history")
+@click.option("--notebook", "notebook_id", default=None, help="Notebook ID")
+@handle_error
+def chat_history(notebook_id):
+    """Show chat history."""
+    emit(
+        run_notebooklm(
+            ["history"],
+            notebook_id=resolve_notebook_id(notebook_id),
+            json_output=_json_output,
+        )
+    )
+
+
+@cli.group()
+def artifact():
+    """Artifact generation and inspection commands."""
+
+
+@artifact.command("list")
+@click.option("--notebook", "notebook_id", default=None, help="Notebook ID")
+@handle_error
+def artifact_list(notebook_id):
+    """List notebook artifacts."""
+    emit(
+        run_notebooklm(
+            ["artifact", "list"],
+            notebook_id=resolve_notebook_id(notebook_id),
+            json_output=_json_output,
+        )
+    )
+
+
+@artifact.command("generate-report")
+@click.option("--notebook", "notebook_id", default=None, help="Notebook ID")
+@handle_error
+def artifact_generate_report(notebook_id):
+    """Generate a report artifact."""
+    emit(
+        run_notebooklm(
+            ["generate", "report", "--wait"],
+            notebook_id=resolve_notebook_id(notebook_id),
+            json_output=_json_output,
+        )
+    )
+
+
+@cli.group()
+def download():
+    """Artifact download helpers."""
+
+
+@download.command("report")
+@click.argument("output_path")
+@click.option("--notebook", "notebook_id", default=None, help="Notebook ID")
+@handle_error
+def download_report(output_path, notebook_id):
+    """Download the latest report artifact."""
+    emit(
+        run_notebooklm(
+            ["download", "report", output_path],
+            notebook_id=resolve_notebook_id(notebook_id),
+            json_output=_json_output,
+        )
+    )
+
+
+@cli.group()
+def share():
+    """Sharing and access control commands."""
+
+
+@share.command("status")
+@click.option("--notebook", "notebook_id", default=None, help="Notebook ID")
+@handle_error
+def share_status(notebook_id):
+    """Inspect notebook sharing state."""
+    emit(
+        run_notebooklm(
+            ["share", "status"],
+            notebook_id=resolve_notebook_id(notebook_id),
+            json_output=_json_output,
+        )
+    )
+
+
+def main():
+    cli()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/skills/SKILL.md b/notebooklm/agent-harness/cli_anything/notebooklm/skills/SKILL.md
new file mode 100644
index 000000000..12940c3a7
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/skills/SKILL.md
@@ -0,0 +1,78 @@
+---
+name: cli-anything-notebooklm
+description: Experimental NotebookLM harness for listing notebooks, managing sources, asking questions, generating artifacts, and downloading outputs through an installed notebooklm CLI.
+---
+
+# cli-anything-notebooklm
+
+Experimental NotebookLM harness for CLI-Anything.
+
+## Installation
+
+This package is intended to be installed from the harness directory:
+
+```bash
+cd notebooklm/agent-harness
+python3 -m pip install -e .
+```
+
+Install the upstream NotebookLM CLI if needed:
+
+```bash
+python3 -m pip install --user 'notebooklm-py[browser]'
+python3 -m playwright install chromium
+```
+
+## Requirements
+
+- `notebooklm` command installed locally
+- Valid local NotebookLM login session
+
+## Usage
+
+### Basic Commands
+
+```bash
+# Show help
+cli-anything-notebooklm --help
+
+# Start with a notebook context
+cli-anything-notebooklm --notebook nb_123 source list
+
+# Prefer JSON for agent use
+cli-anything-notebooklm --json notebook list
+```
+
+## Command Groups
+
+| Group | Purpose |
+| --- | --- |
+| `auth` | login and auth validation |
+| `notebook` | notebook list, create, summary |
+| `source` | source listing and URL add |
+| `chat` | ask questions and inspect history |
+| `artifact` | list and generate artifacts |
+| `download` | fetch generated outputs |
+| `share` | inspect sharing state |
+
+## Agent Workflow
+
+1. Check auth with `cli-anything-notebooklm auth status`
+2. Discover notebook IDs with `cli-anything-notebooklm --json notebook list`
+3. Use explicit `--notebook` for follow-up commands
+4. Prefer `--json` only where the upstream `notebooklm` command supports it
+
+## Agent Guidance
+
+- Prefer explicit notebook IDs with `--notebook`.
+- Use `--json` for machine-readable output only on commands that support it upstream.
+- Treat this harness as experimental and unofficial.
+- Do not expose auth files or cookies in logs.
+- NotebookLM is a Google product; this harness is unofficial and not affiliated with Google.
+
+## References
+
+- CLI-Anything: https://github.com/HKUDS/CLI-Anything
+- CLI-Anything HARNESS.md: https://github.com/HKUDS/CLI-Anything/blob/main/cli-anything-plugin/HARNESS.md
+- notebooklm-py: https://github.com/teng-lin/notebooklm-py
+- Google NotebookLM help: https://support.google.com/notebooklm/answer/16206563
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/tests/TEST.md b/notebooklm/agent-harness/cli_anything/notebooklm/tests/TEST.md
new file mode 100644
index 000000000..24b37f86a
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/tests/TEST.md
@@ -0,0 +1,89 @@
+# NotebookLM Harness - Test Documentation
+
+## Test Inventory
+
+| File | Focus |
+| --- | --- |
+| `test_core.py` | backend discovery, command building, session persistence, packaging fixtures |
+| `test_cli_smoke.py` | help output and command group exposure |
+| `test_manual_e2e.md` | authenticated local smoke-test checklist |
+
+## Coverage Notes
+
+This harness has three validation layers:
+
+- unit tests for backend helpers and session state
+- smoke tests for CLI help and command registration
+- manual authenticated end-to-end verification
+
+Because NotebookLM depends on a live Google account session and an installed
+community CLI, full authenticated E2E coverage is not run in public CI.
+
+## Local Verification
+
+Verified on 2026-03-17 in the notebooklm harness worktree.
+
+### Commands Run
+
+```bash
+python3 -m pytest cli_anything/notebooklm/tests/test_core.py -q
+python3 -m pytest cli_anything/notebooklm/tests/test_cli_smoke.py -q
+python3 -m cli_anything.notebooklm.notebooklm_cli --help
+```
+
+### Results
+
+- `test_core.py`: 9 passed
+- `test_cli_smoke.py`: 5 passed
+- `python3 -m cli_anything.notebooklm.notebooklm_cli --help`: exit code 0, help text rendered correctly
+
+### Notes
+
+- Added a regression test for module execution so `python -m cli_anything.notebooklm.notebooklm_cli --help` is covered, not just Click's in-process `CliRunner`.
+- The authenticated `notebooklm` backend remains intentionally manual for end-to-end verification because it depends on a local Google session.
+
+## PR Polish Verification
+
+Verified on 2026-03-17 after README, SKILL, and subprocess smoke coverage upgrades.
+
+### Commands Run
+
+```bash
+python3 -m pytest cli_anything/notebooklm/tests -q
+python3 -m cli_anything.notebooklm.notebooklm_cli --help
+```
+
+### Results
+
+- Full NotebookLM harness suite: 17 passed
+- Module help command: exit code 0, rendered command groups correctly
+
+### Notes
+
+- Added doc-level assertions so the package README and skill file now explicitly cover installation, tests, safety boundaries, and unofficial Google attribution.
+- Added `_resolve_cli`-style subprocess smoke coverage so the CLI can be exercised through a resolved command path, not only through Click's in-process test runner.
+
+## Review Fix Verification
+
+Verified on 2026-03-17 after addressing PR review feedback about JSON passthrough and auth command semantics.
+
+### Commands Run
+
+```bash
+python3 -m pytest cli_anything/notebooklm/tests/test_core.py -q
+python3 -m pytest cli_anything/notebooklm/tests/test_cli_smoke.py -q
+python3 -m pytest cli_anything/notebooklm/tests -q
+python3 -m cli_anything.notebooklm.notebooklm_cli --json auth login
+```
+
+### Results
+
+- targeted backend tests: pass
+- targeted CLI routing tests: pass
+- full NotebookLM harness suite: pass
+- `--json auth login`: fails fast with a structured JSON error instead of passing an invalid `--json` flag through to upstream login
+
+### Notes
+
+- `auth status` now wraps upstream `notebooklm auth check`, which matches authentication semantics.
+- JSON passthrough is now limited to wrapper commands whose upstream `notebooklm` command has verified `--json` support.
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/tests/__init__.py b/notebooklm/agent-harness/cli_anything/notebooklm/tests/__init__.py
new file mode 100644
index 000000000..9eb399dd0
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/tests/__init__.py
@@ -0,0 +1 @@
+"""Tests for the NotebookLM harness."""
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/tests/test_cli_smoke.py b/notebooklm/agent-harness/cli_anything/notebooklm/tests/test_cli_smoke.py
new file mode 100644
index 000000000..d803d5758
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/tests/test_cli_smoke.py
@@ -0,0 +1,105 @@
+"""CLI smoke tests for the NotebookLM harness scaffold."""
+
+import os
+from pathlib import Path
+import shutil
+import subprocess
+import sys
+
+from click.testing import CliRunner
+
+from cli_anything.notebooklm.notebooklm_cli import cli
+
+
+def _resolve_cli(name):
+    """Resolve installed CLI command; fall back to python -m for local dev."""
+    force = os.environ.get("CLI_ANYTHING_FORCE_INSTALLED", "").strip() == "1"
+    path = shutil.which(name)
+    if path:
+        return [path], None
+    if force:
+        raise RuntimeError(f"{name} not found in PATH. Install with: pip install -e .")
+
+    module = "cli_anything.notebooklm.notebooklm_cli"
+    package_root = Path(__file__).resolve().parents[3]
+    env = os.environ.copy()
+    current = env.get("PYTHONPATH", "")
+    env["PYTHONPATH"] = (
+        f"{package_root}{os.pathsep}{current}" if current else str(package_root)
+    )
+    return [sys.executable, "-m", module], env
+
+
+class TestRootHelp:
+    def test_root_help_shows_experimental_notebooklm(self):
+        result = CliRunner().invoke(cli, ["--help"])
+        assert result.exit_code == 0
+        assert "NotebookLM CLI" in result.output
+        assert "Experimental" in result.output
+
+    def test_root_help_lists_command_groups(self):
+        result = CliRunner().invoke(cli, ["--help"])
+        assert result.exit_code == 0
+        for group in ["auth", "notebook", "source", "chat", "artifact", "download", "share"]:
+            assert group in result.output
+
+
+class TestSubcommandHelp:
+    def test_auth_status_help(self):
+        result = CliRunner().invoke(cli, ["auth", "status", "--help"])
+        assert result.exit_code == 0
+        assert "Check authentication status" in result.output
+
+    def test_notebook_list_help(self):
+        result = CliRunner().invoke(cli, ["notebook", "list", "--help"])
+        assert result.exit_code == 0
+        assert "List notebooks" in result.output
+
+
+class TestCommandRouting:
+    def test_auth_status_routes_to_auth_check(self, monkeypatch):
+        calls = []
+
+        def fake_run(args, **kwargs):
+            calls.append((args, kwargs))
+            return {"ok": True}
+
+        monkeypatch.setattr(
+            "cli_anything.notebooklm.notebooklm_cli.run_notebooklm",
+            fake_run,
+        )
+
+        result = CliRunner().invoke(cli, ["auth", "status"])
+
+        assert result.exit_code == 0
+        assert calls == [(["auth", "check"], {"json_output": False})]
+
+
+class TestModuleExecution:
+    def test_python_m_module_help_emits_output(self):
+        result = subprocess.run(
+            [
+                sys.executable,
+                "-m",
+                "cli_anything.notebooklm.notebooklm_cli",
+                "--help",
+            ],
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+        assert result.returncode == 0
+        assert "NotebookLM CLI" in result.stdout
+
+    def test_resolved_cli_help_emits_output(self):
+        command, env = _resolve_cli("cli-anything-notebooklm")
+        result = subprocess.run(
+            command + ["--help"],
+            capture_output=True,
+            text=True,
+            check=False,
+            env=env,
+        )
+        assert result.returncode == 0
+        assert "NotebookLM CLI" in result.stdout
+        assert "auth" in result.stdout
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/tests/test_core.py b/notebooklm/agent-harness/cli_anything/notebooklm/tests/test_core.py
new file mode 100644
index 000000000..bc9d2f770
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/tests/test_core.py
@@ -0,0 +1,112 @@
+"""Unit tests for NotebookLM harness scaffold."""
+
+import json
+from pathlib import Path
+from unittest.mock import patch
+
+import pytest
+
+from cli_anything.notebooklm.core.session import Session
+from cli_anything.notebooklm.utils.notebooklm_backend import (
+    build_command,
+    command_supports_json,
+    require_notebooklm,
+    run_notebooklm,
+    sanitize_error,
+)
+
+
+class TestBackendDiscovery:
+    def test_require_notebooklm_returns_path(self):
+        with patch("cli_anything.notebooklm.utils.notebooklm_backend.shutil.which", return_value="/usr/local/bin/notebooklm"):
+            assert require_notebooklm() == "/usr/local/bin/notebooklm"
+
+    def test_require_notebooklm_raises_with_install_guidance(self):
+        with patch("cli_anything.notebooklm.utils.notebooklm_backend.shutil.which", return_value=None):
+            with pytest.raises(RuntimeError, match="notebooklm command not found"):
+                require_notebooklm()
+
+
+class TestCommandBuilder:
+    def test_build_command_with_notebook_id_and_json(self):
+        command = build_command(
+            ["source", "list"],
+            notebook_id="nb_123",
+            json_output=True,
+        )
+        assert command == [
+            "notebooklm",
+            "source",
+            "list",
+            "-n",
+            "nb_123",
+            "--json",
+        ]
+
+    def test_build_command_without_notebook_id(self):
+        command = build_command(["list"])
+        assert command == ["notebooklm", "list"]
+
+    def test_command_supports_json_for_verified_command(self):
+        assert command_supports_json(["download", "report"]) is True
+
+    def test_command_supports_json_rejects_unsupported_command(self):
+        assert command_supports_json(["login"]) is False
+
+
+class TestRunNotebooklm:
+    def test_run_notebooklm_rejects_json_for_unsupported_command(self):
+        with patch("cli_anything.notebooklm.utils.notebooklm_backend.subprocess.run") as run_mock:
+            with pytest.raises(RuntimeError, match="JSON output is not supported for command: login"):
+                run_notebooklm(["login"], json_output=True)
+        run_mock.assert_not_called()
+
+
+class TestErrorSanitization:
+    def test_sanitize_error_redacts_storage_state_path(self):
+        raw = "Failed to open /Users/tester/.notebooklm/storage_state.json because auth expired"
+        assert "storage_state.json" not in sanitize_error(raw)
+        assert "[redacted-auth-path]" in sanitize_error(raw)
+
+
+class TestSession:
+    def test_session_persists_active_notebook(self, tmp_path):
+        session_file = tmp_path / "session.json"
+        session = Session(session_file=session_file)
+        session.set_active_notebook("nb_abc")
+
+        reloaded = Session(session_file=session_file)
+        assert reloaded.get_active_notebook() == "nb_abc"
+
+    def test_session_clear_active_notebook(self, tmp_path):
+        session_file = tmp_path / "session.json"
+        session = Session(session_file=session_file)
+        session.set_active_notebook("nb_abc")
+        session.clear_active_notebook()
+
+        data = json.loads(Path(session_file).read_text())
+        assert data["active_notebook"] is None
+
+
+class TestPackagingFixtures:
+    def test_acknowledgements_reference_external_projects(self):
+        readme = Path("cli_anything/notebooklm/README.md").read_text(encoding="utf-8")
+        assert "CLI-Anything" in readme
+        assert "notebooklm-py" in readme
+
+    def test_readme_documents_install_test_and_safety_sections(self):
+        readme = Path("cli_anything/notebooklm/README.md").read_text(encoding="utf-8")
+        assert "## Install" in readme
+        assert "## Run Tests" in readme
+        assert "## Safety Notes" in readme
+        assert "Google NotebookLM" in readme
+
+    def test_skill_file_contains_usage_and_boundary_guidance(self):
+        skill = Path("cli_anything/notebooklm/skills/SKILL.md").read_text(encoding="utf-8")
+        assert "## Installation" in skill
+        assert "## Usage" in skill
+        assert "unofficial" in skill.lower()
+        assert "not affiliated with Google" in skill
+
+    def test_skill_file_exists(self):
+        assert Path("cli_anything/notebooklm/skills/SKILL.md").is_file()
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/tests/test_manual_e2e.md b/notebooklm/agent-harness/cli_anything/notebooklm/tests/test_manual_e2e.md
new file mode 100644
index 000000000..c0b943dd9
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/tests/test_manual_e2e.md
@@ -0,0 +1,11 @@
+# Manual E2E Checklist
+
+1. Run `notebooklm login`.
+2. Run `cli-anything-notebooklm auth status`.
+3. Run `cli-anything-notebooklm notebook list`.
+4. Create a temporary notebook with `cli-anything-notebooklm notebook create "CLI Anything Smoke Test"`.
+5. Add a simple text or URL source.
+6. Run `cli-anything-notebooklm chat ask "Summarize the notebook."`.
+7. Generate one artifact, such as a report.
+8. Download the artifact to a temporary local path.
+9. Delete the temporary notebook manually after verification.
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/utils/__init__.py b/notebooklm/agent-harness/cli_anything/notebooklm/utils/__init__.py
new file mode 100644
index 000000000..2f7adc5be
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/utils/__init__.py
@@ -0,0 +1 @@
+"""Utility modules for the NotebookLM harness."""
diff --git a/notebooklm/agent-harness/cli_anything/notebooklm/utils/notebooklm_backend.py b/notebooklm/agent-harness/cli_anything/notebooklm/utils/notebooklm_backend.py
new file mode 100644
index 000000000..6603d980f
--- /dev/null
+++ b/notebooklm/agent-harness/cli_anything/notebooklm/utils/notebooklm_backend.py
@@ -0,0 +1,124 @@
+"""NotebookLM backend adapter.
+
+This module wraps an installed `notebooklm` CLI for use inside a CLI-Anything
+harness. It does not implement a Google official API client.
+
+References:
+- CLI-Anything methodology: https://github.com/HKUDS/CLI-Anything
+- notebooklm-py project: https://github.com/teng-lin/notebooklm-py
+
+Security rules:
+- never print credential files or cookies
+- never commit auth state into the repository
+- prefer explicit notebook IDs
+"""
+
+from __future__ import annotations
+
+import json
+import re
+import shutil
+import subprocess
+
+
+JSON_SUPPORTED_COMMANDS = {
+    ("auth", "check"),
+    ("status",),
+    ("list",),
+    ("create",),
+    ("source", "list"),
+    ("source", "add"),
+    ("ask",),
+    ("history",),
+    ("artifact", "list"),
+    ("generate", "report"),
+    ("download", "report"),
+    ("share", "status"),
+}
+TWO_PART_COMMAND_GROUPS = {"auth", "source", "artifact", "generate", "download", "share"}
+
+
+def require_notebooklm() -> str:
+    """Resolve the notebooklm command from PATH."""
+    path = shutil.which("notebooklm")
+    if path:
+        return path
+    raise RuntimeError(
+        "notebooklm command not found. Install it with:\n"
+        "  python3 -m pip install --user 'notebooklm-py[browser]'\n"
+        "  python3 -m playwright install chromium"
+    )
+
+
+def command_supports_json(args: list[str]) -> bool:
+    """Return whether the wrapped notebooklm command supports --json."""
+    if not args:
+        return False
+    if len(args) > 1 and args[0] in TWO_PART_COMMAND_GROUPS:
+        key = tuple(args[:2])
+    else:
+        key = tuple(args[:1])
+    return key in JSON_SUPPORTED_COMMANDS
+
+
+def build_command(
+    args: list[str],
+    *,
+    notebook_id: str | None = None,
+    json_output: bool = False,
+) -> list[str]:
+    """Build a notebooklm command with explicit notebook context."""
+    command = ["notebooklm", *args]
+    if notebook_id:
+        command.extend(["-n", notebook_id])
+    if json_output and command_supports_json(args):
+        command.append("--json")
+    return command
+
+
+def sanitize_error(text: str) -> str:
+    """Redact local auth file paths from stderr/stdout."""
+    patterns = [
+        r"/Users/[^/\s]+/\.notebooklm/storage_state\.json",
+        r"/home/[^/\s]+/\.notebooklm/storage_state\.json",
+        r"[A-Za-z]:\\\\Users\\\\[^\\\s]+\\\\\.notebooklm\\\\storage_state\.json",
+    ]
+    sanitized = text
+    for pattern in patterns:
+        sanitized = re.sub(pattern, "[redacted-auth-path]", sanitized)
+    sanitized = sanitized.replace("storage_state.json", "[redacted-auth-path]")
+    return sanitized
+
+
+def run_notebooklm(
+    args: list[str],
+    *,
+    notebook_id: str | None = None,
+    json_output: bool = False,
+) -> dict | str:
+    """Run notebooklm and optionally parse JSON output."""
+    if json_output and not command_supports_json(args):
+        raise RuntimeError(
+            f"JSON output is not supported for command: {' '.join(args)}"
+        )
+
+    command = build_command(
+        args,
+        notebook_id=notebook_id,
+        json_output=json_output,
+    )
+    command[0] = require_notebooklm()
+
+    result = subprocess.run(
+        command,
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+
+    if result.returncode != 0:
+        raise RuntimeError(sanitize_error(result.stderr or result.stdout))
+
+    if json_output:
+        return json.loads(result.stdout or "{}")
+    return result.stdout.strip()
diff --git a/notebooklm/agent-harness/setup.py b/notebooklm/agent-harness/setup.py
new file mode 100644
index 000000000..c6679bd04
--- /dev/null
+++ b/notebooklm/agent-harness/setup.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+"""
+setup.py for cli-anything-notebooklm
+
+Install with: pip install -e .
+"""
+
+from setuptools import setup, find_namespace_packages
+
+with open("cli_anything/notebooklm/README.md", "r", encoding="utf-8") as fh:
+    long_description = fh.read()
+
+setup(
+    name="cli-anything-notebooklm",
+    version="0.1.0",
+    author="cli-anything contributors",
+    author_email="",
+    description="Experimental CLI harness for NotebookLM via an installed notebooklm CLI. Unofficial and community-maintained.",
+    long_description=long_description,
+    long_description_content_type="text/markdown",
+    url="https://github.com/HKUDS/CLI-Anything",
+    packages=find_namespace_packages(include=["cli_anything.*"]),
+    classifiers=[
+        "Development Status :: 4 - Beta",
+        "Intended Audience :: Developers",
+        "Topic :: Software Development :: Libraries :: Python Modules",
+        "License :: OSI Approved :: MIT License",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+    ],
+    python_requires=">=3.10",
+    install_requires=[
+        "click>=8.0.0",
+        "prompt-toolkit>=3.0.0",
+    ],
+    extras_require={
+        "dev": [
+            "pytest>=7.0.0",
+            "pytest-cov>=4.0.0",
+        ],
+    },
+    entry_points={
+        "console_scripts": [
+            "cli-anything-notebooklm=cli_anything.notebooklm.notebooklm_cli:main",
+        ],
+    },
+    package_data={
+        "cli_anything.notebooklm": ["skills/*.md"],
+    },
+    include_package_data=True,
+    zip_safe=False,
+)
diff --git a/registry.json b/registry.json
index 86011a3a6..4758c86db 100644
--- a/registry.json
+++ b/registry.json
@@ -2,7 +2,7 @@
   "meta": {
     "repo": "https://github.com/HKUDS/CLI-Anything",
     "description": "CLI-Hub — Agent-native stateful CLI interfaces for softwares, codebases, and Web Services",
-    "updated": "2026-03-17"
+    "updated": "2026-03-18"
   },
   "clis": [
     {
@@ -125,6 +125,18 @@
       "skill_md": null,
       "category": "diagrams"
     },
+    {
+      "name": "notebooklm",
+      "display_name": "NotebookLM",
+      "version": "0.1.0",
+      "description": "Experimental NotebookLM harness scaffold wrapping the installed notebooklm CLI for notebook, source, chat, artifact, download, and sharing workflows",
+      "requires": "notebooklm CLI from notebooklm-py + valid local NotebookLM login session",
+      "homepage": "https://notebooklm.google.com",
+      "install_cmd": "pip install git+https://github.com/HKUDS/CLI-Anything.git#subdirectory=notebooklm/agent-harness",
+      "entry_point": "cli-anything-notebooklm",
+      "skill_md": "notebooklm/agent-harness/cli_anything/notebooklm/skills/SKILL.md",
+      "category": "ai"
+    },
     {
       "name": "obs-studio",
       "display_name": "OBS Studio",