diff --git a/.env.example b/.env.example
index a4c87457..5fce7667 100644
--- a/.env.example
+++ b/.env.example
@@ -6,6 +6,8 @@ ANTHROPIC_API_KEY=
 XAI_API_KEY=
 OPENROUTER_API_KEY=
 
+NOTEBOOKLM_ID=e8fd4391-9cb2-43ff-b893-1316a52857b6
+
 # ── Data Provider API Keys ───────────────────────────────────────────
 ALPHA_VANTAGE_API_KEY=
 # Free at https://finnhub.io — required for earnings/economic calendars and insider transactions
@@ -62,6 +64,10 @@ TRADINGAGENTS_MAX_DEBATE_ROUNDS=2
 # TRADINGAGENTS_MAX_RISK_DISCUSS_ROUNDS=1    # risk analyst discussion rounds (1–5)
 # TRADINGAGENTS_MAX_RECUR_LIMIT=100          # LangGraph recursion limit
 
+# ── Google NotebookLM sync (optional) ────────────────────────────────
+# Notebook ID for daily digest upload via the nlm CLI tool
+# NOTEBOOK_ID=
+
 # ── Data vendor routing ──────────────────────────────────────────────
 # Category-level vendor selection (yfinance | alpha_vantage | finnhub)
 # TRADINGAGENTS_VENDOR_CORE_STOCK_APIS=yfinance
diff --git a/cli/main.py b/cli/main.py
index b485a836..6232e5b3 100644
--- a/cli/main.py
+++ b/cli/main.py
@@ -29,6 +29,8 @@ from rich.rule import Rule
 
 from tradingagents.graph.trading_graph import TradingAgentsGraph
 from tradingagents.report_paths import get_daily_dir, get_market_dir, get_ticker_dir
+from tradingagents.daily_digest import append_to_digest
+from tradingagents.notebook_sync import sync_to_notebooklm
 from tradingagents.default_config import DEFAULT_CONFIG
 from cli.models import AnalystType
 from cli.utils import *
@@ -1173,6 +1175,14 @@ def run_analysis():
         except Exception as e:
             console.print(f"[red]Error saving report: {e}[/red]")
 
+    # Append to daily digest and sync to NotebookLM
+    digest_content = message_buffer.final_report or ""
+    if digest_content:
+        digest_path = append_to_digest(
+            selections["analysis_date"], "analyze", selections["ticker"], digest_content
+        )
+        sync_to_notebooklm(digest_path)
+
     # Write observability log
     log_dir = get_ticker_dir(selections["analysis_date"], selections["ticker"])
     log_dir.mkdir(parents=True, exist_ok=True)
@@ -1269,6 +1279,12 @@ def run_scan(date: Optional[str] = None):
     )
     set_run_logger(None)
 
+    # Append to daily digest and sync to NotebookLM
+    macro_content = result.get("macro_scan_summary", "")
+    if macro_content:
+        digest_path = append_to_digest(scan_date, "scan", "Market Scan", macro_content)
+        sync_to_notebooklm(digest_path)
+
     console.print(f"\n[green]Results saved to {save_dir}[/green]")
 
 
diff --git a/docs/agent/CURRENT_STATE.md b/docs/agent/CURRENT_STATE.md
index 7ccdb135..7a41d4ad 100644
--- a/docs/agent/CURRENT_STATE.md
+++ b/docs/agent/CURRENT_STATE.md
@@ -1,27 +1,23 @@
 # Current Milestone
 
-Report path unification complete. Observability logging (data sources, LLM calls, tool calls, token counts) is the active task. Next: `pipeline` CLI command.
+Daily digest consolidation and Google NotebookLM sync shipped (PR open: `feat/daily-digest-notebooklm`). All analyses now append to a single `daily_digest.md` per day and auto-upload to NotebookLM via `nlm` CLI. Next: PR review and merge.
 
 # Recent Progress
 
+- **PR #22 merged**: Unified report paths, structured observability logging, memory system update
+- **feat/daily-digest-notebooklm** (open PR): Daily digest consolidation + NotebookLM sync
+  - `tradingagents/daily_digest.py` — `append_to_digest()` appends timestamped entries to `reports/daily/{date}/daily_digest.md`
+  - `tradingagents/notebook_sync.py` — `sync_to_notebooklm()` deletes old source then uploads new digest via `nlm` CLI (opt-in via `NOTEBOOK_ID` env var)
+  - `tradingagents/report_paths.py` — added `get_digest_path(date)`
+  - `cli/main.py` — `analyze` and `scan` commands both call digest + sync after each run
+  - `.env.example` — `NOTEBOOK_ID` added
 - **PR #21 merged**: Memory system v2 — builder/reader skills, 5 context files, post-commit hook
-- **PR #18 merged**: Opt-in vendor fallback — fail-fast by default, `FALLBACK_ALLOWED` whitelist for fungible data only (ADR 011)
-- **PR #19 merged**: Merge conflict resolution after PR #18
-- **Report path unification** (`80e174c`): All reports now written under `reports/daily/{date}/{ticker}/` for per-ticker analysis and `reports/daily/{date}/market/` for scanner output
-- `pipeline` CLI command implemented — scan JSON → filter by conviction → per-ticker deep dive via `MacroBridge`
-- `extract_json()` utility in `agents/utils/json_utils.py` handles DeepSeek R1 `<think>` blocks and markdown fences
-- Memory builder and reader skills created in `.claude/skills/`
-- Structured context files generated under `docs/agent/context/` (ARCHITECTURE, CONVENTIONS, COMPONENTS, TECH_STACK, GLOSSARY)
+- **PR #18 merged**: Opt-in vendor fallback — fail-fast by default (ADR 011)
 - 220+ offline tests passing
-- 12 pre-existing test failures fixed across 5 files
 
 # In Progress
 
-- **Observability logging**: Structured logging for data source calls (vendor, endpoint, success/failure), LLM requests (model name, agent, token counts), and tool invocations (tool name, duration). Goal: understand what's being called, by whom, and at what cost per run.
-
-# Planned Next
-
-- Report path unification tests (verify new paths in integration tests)
+- Awaiting `NOTEBOOK_ID` from user to enable end-to-end NotebookLM test
 
 # Active Blockers
 
diff --git a/docs/agent/context/ARCHITECTURE.md b/docs/agent/context/ARCHITECTURE.md
index 33291f30..854be167 100644
--- a/docs/agent/context/ARCHITECTURE.md
+++ b/docs/agent/context/ARCHITECTURE.md
@@ -87,6 +87,7 @@ All generated artifacts live under `reports/daily/{YYYY-MM-DD}/`:
 ```
 reports/
 └── daily/{YYYY-MM-DD}/
+    ├── daily_digest.md            # consolidated daily report (all runs appended)
     ├── market/                    # scan results (geopolitical_report.md, etc.)
     ├── {TICKER}/                  # per-ticker analysis / pipeline
     │   ├── 1_analysts/
@@ -95,10 +96,20 @@ reports/
     └── summary.md                 # pipeline combined summary
 ```
 
-Helper functions: `get_daily_dir()`, `get_market_dir()`, `get_ticker_dir()`, `get_eval_dir()`.
+Helper functions: `get_daily_dir()`, `get_market_dir()`, `get_ticker_dir()`, `get_eval_dir()`, `get_digest_path()`.
 
 Source: `tradingagents/report_paths.py`
 
+## Daily Digest & NotebookLM Sync
+
+After every `analyze` or `scan` run, the CLI:
+1. Calls `append_to_digest(date, entry_type, label, content)` → appends a timestamped section to `reports/daily/{date}/daily_digest.md` (creates the file on first run)
+2. Calls `sync_to_notebooklm(digest_path)` → deletes the previous `daily_digest.md` source from the configured NotebookLM notebook, then uploads the updated file via the `nlm` CLI tool
+
+`NOTEBOOK_ID` env var controls the target notebook. If unset, the sync step is silently skipped (opt-in).
+
+Source: `tradingagents/daily_digest.py`, `tradingagents/notebook_sync.py`
+
 ## Observability
 
 `RunLogger` accumulates structured events (JSON-lines) for a single run. Four event kinds: `llm` (model, agent, tokens in/out, latency), `tool` (tool name, args, success, latency), `vendor` (method, vendor, success, latency), `report` (path). Thread-safe via `_lock`.
diff --git a/docs/agent/context/COMPONENTS.md b/docs/agent/context/COMPONENTS.md
index 4b7a2631..99d462d5 100644
--- a/docs/agent/context/COMPONENTS.md
+++ b/docs/agent/context/COMPONENTS.md
@@ -9,6 +9,8 @@ tradingagents/
 ├── __init__.py
 ├── default_config.py              # All config keys, defaults, env var overrides
 ├── report_paths.py                # Unified report path helpers (reports/daily/{date}/)
+├── daily_digest.py                # append_to_digest() — consolidates runs into daily_digest.md
+├── notebook_sync.py               # sync_to_notebooklm() — uploads digest to NotebookLM via nlm CLI
 ├── observability.py               # RunLogger, _LLMCallbackHandler, structured event logging
 ├── agents/
 │   ├── __init__.py
diff --git a/tradingagents/daily_digest.py b/tradingagents/daily_digest.py
new file mode 100644
index 00000000..343aaeb2
--- /dev/null
+++ b/tradingagents/daily_digest.py
@@ -0,0 +1,46 @@
+"""Daily digest consolidation.
+
+Appends individual report entries (analyze or scan) into a single
+``daily_digest.md`` file under ``reports/daily/{date}/``.
+"""
+
+from __future__ import annotations
+
+from datetime import datetime
+from pathlib import Path
+
+from tradingagents.report_paths import get_digest_path
+
+
+def append_to_digest(date: str, entry_type: str, label: str, content: str) -> Path:
+    """Append a timestamped section to the daily digest file.
+
+    Parameters
+    ----------
+    date:
+        Date string (YYYY-MM-DD) used to locate the digest file.
+    entry_type:
+        Category of the entry, e.g. ``"analyze"`` or ``"scan"``.
+    label:
+        Human-readable label, e.g. ticker symbol or ``"Market Scan"``.
+    content:
+        The report content to append.
+
+    Returns
+    -------
+    Path
+        The path to the digest file.
+    """
+    digest_path = get_digest_path(date)
+    digest_path.parent.mkdir(parents=True, exist_ok=True)
+
+    existing = digest_path.read_text() if digest_path.exists() else ""
+
+    if not existing:
+        existing = f"# Daily Trading Report — {date}\n\n"
+
+    timestamp = datetime.now().strftime("%H:%M")
+    section = f"---\n### {timestamp} — {label} ({entry_type})\n\n{content}\n\n"
+
+    digest_path.write_text(existing + section)
+    return digest_path
diff --git a/tradingagents/notebook_sync.py b/tradingagents/notebook_sync.py
new file mode 100644
index 00000000..6a2d8bef
--- /dev/null
+++ b/tradingagents/notebook_sync.py
@@ -0,0 +1,124 @@
+"""Google NotebookLM sync via the ``nlm`` CLI tool (jacob-bd/notebooklm-mcp-cli).
+
+Uploads the daily digest as a note to a NotebookLM notebook, updating the
+existing note if one with the same title already exists. Entirely opt-in:
+if no ``NOTEBOOK_ID`` is configured the function is a silent no-op.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import shutil
+import subprocess
+from pathlib import Path
+
+from rich.console import Console
+
+console = Console()
+
+_NOTE_TITLE = "Daily Trading Digest"
+
+# Common install locations outside of PATH (e.g. pip install --user)
+_FALLBACK_PATHS = [
+    Path.home() / ".local" / "bin" / "nlm",
+    Path("/usr/local/bin/nlm"),
+]
+
+
+def _find_nlm() -> str | None:
+    """Return the path to the nlm binary, or None if not found."""
+    found = shutil.which("nlm")
+    if found:
+        return found
+    for p in _FALLBACK_PATHS:
+        if p.exists():
+            return str(p)
+    return None
+
+
+def sync_to_notebooklm(digest_path: Path, notebook_id: str | None = None) -> None:
+    """Upload *digest_path* content to Google NotebookLM as a note.
+
+    If a note titled ``Daily Trading Digest`` already exists it is updated
+    in-place; otherwise a new note is created.
+
+    Parameters
+    ----------
+    digest_path:
+        Path to the digest markdown file to upload.
+    notebook_id:
+        NotebookLM notebook ID.  Falls back to the ``NOTEBOOK_ID``
+        environment variable when *None*.
+    """
+    if notebook_id is None:
+        notebook_id = os.environ.get("NOTEBOOKLM_ID")
+    if not notebook_id:
+        return  # opt-in — silently skip when not configured
+
+    nlm = _find_nlm()
+    if not nlm:
+        console.print("[yellow]Warning: nlm CLI not found — skipping NotebookLM sync[/yellow]")
+        return
+
+    content = digest_path.read_text()
+
+    # Check for an existing note with the same title
+    existing_note_id = _find_note(nlm, notebook_id)
+
+    if existing_note_id:
+        _update_note(nlm, notebook_id, existing_note_id, content)
+    else:
+        _create_note(nlm, notebook_id, content)
+
+
+def _find_note(nlm: str, notebook_id: str) -> str | None:
+    """Return the note ID for the daily digest note, or None if not found."""
+    try:
+        result = subprocess.run(
+            [nlm, "note", "list", notebook_id, "--json"],
+            capture_output=True,
+            text=True,
+        )
+        if result.returncode != 0:
+            return None
+        data = json.loads(result.stdout)
+        notes = data.get("notes", data) if isinstance(data, dict) else data
+        for note in notes:
+            if isinstance(note, dict) and note.get("title") == _NOTE_TITLE:
+                return note.get("id") or note.get("noteId")
+    except (ValueError, KeyError, OSError):
+        pass
+    return None
+
+
+def _create_note(nlm: str, notebook_id: str, content: str) -> None:
+    """Create a new note in the notebook."""
+    try:
+        result = subprocess.run(
+            [nlm, "note", "create", notebook_id, "--title", _NOTE_TITLE, "--content", content],
+            capture_output=True,
+            text=True,
+        )
+        if result.returncode == 0:
+            console.print(f"[green]✓ Created NotebookLM note: {_NOTE_TITLE}[/green]")
+        else:
+            console.print(f"[yellow]Warning: nlm note create failed: {result.stderr.strip()}[/yellow]")
+    except OSError as exc:
+        console.print(f"[yellow]Warning: could not create NotebookLM note: {exc}[/yellow]")
+
+
+def _update_note(nlm: str, notebook_id: str, note_id: str, content: str) -> None:
+    """Update an existing note's content."""
+    try:
+        result = subprocess.run(
+            [nlm, "note", "update", notebook_id, note_id, "--content", content],
+            capture_output=True,
+            text=True,
+        )
+        if result.returncode == 0:
+            console.print(f"[green]✓ Updated NotebookLM note: {_NOTE_TITLE}[/green]")
+        else:
+            console.print(f"[yellow]Warning: nlm note update failed: {result.stderr.strip()}[/yellow]")
+    except OSError as exc:
+        console.print(f"[yellow]Warning: could not update NotebookLM note: {exc}[/yellow]")
diff --git a/tradingagents/report_paths.py b/tradingagents/report_paths.py
index f692dead..956f4063 100644
--- a/tradingagents/report_paths.py
+++ b/tradingagents/report_paths.py
@@ -42,3 +42,8 @@ def get_ticker_dir(date: str, ticker: str) -> Path:
 def get_eval_dir(date: str, ticker: str) -> Path:
     """``reports/daily/{date}/{TICKER}/eval/``"""
     return get_ticker_dir(date, ticker) / "eval"
+
+
+def get_digest_path(date: str) -> Path:
+    """``reports/daily/{date}/daily_digest.md``"""
+    return get_daily_dir(date) / "daily_digest.md"