diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e7ba590
--- /dev/null
+++ b/README.md
@@ -0,0 +1,43 @@
+# Google 4-w-1 CLI
+
+Prosta aplikacja CLI, która po autoryzacji OAuth 2.0 pobiera z Twojego konta Google:
+- ostatnie wiadomości Gmail,
+- zadania z Google Tasks,
+- nadchodzące wydarzenia z Google Calendar,
+- listę nawyków (zadania) z dedykowanej listy "Habits" w Google Tasks.
+
+## Wymagania
+- Python 3.10+
+- Konto Google i włączone API: Gmail API, Google Calendar API, Google Tasks API.
+
+## Konfiguracja OAuth
+1. Wejdź do [Google Cloud Console](https://console.cloud.google.com/apis/credentials) i utwórz **OAuth 2.0 Client ID** typu "Desktop app".
+2. Pobierz plik `credentials.json` i umieść go w katalogu projektu (lub wskaż inną ścieżkę flagą `--credentials`).
+3. Upewnij się, że w projekcie włączone są API: Gmail, Tasks i Calendar.
+
+## Instalacja zależności
+```bash
+python -m venv .venv
+source .venv/bin/activate
+pip install -r requirements.txt
+```
+
+## Uruchomienie
+```bash
+python app/main.py --credentials credentials.json --token token.json
+```
+Przy pierwszym uruchomieniu skrypt otworzy przeglądarkę z prośbą o autoryzację. Token odświeżania zostanie zapisany w `token.json`, dzięki czemu kolejne uruchomienia nie wymagają ponownej zgody.
+
+### Oczekiwany output
+- Sekcja **📨 Gmail**: 5 ostatnich wiadomości z folderu INBOX (nadawca, temat, data).
+- Sekcja **✅ Google Tasks**: do 10 zadań z każdej listy zadań (z terminem, jeśli ustawiony).
+- Sekcja **📅 Google Calendar**: wydarzenia z najbliższych 7 dni z kalendarza głównego.
+- Sekcja **🧠 Nawykowa lista "Habits"**: zadania z listy o nazwie dokładnie `Habits` (jeśli istnieje).
+
+### Flagi
+- `--credentials` – ścieżka do pliku OAuth 2.0 Client ID (`credentials.json`).
+- `--token` – ścieżka do pliku z zapisanym tokenem (`token.json`).
+
+## Uwagi dot. prywatności
+- Token odświeżania i dostępowego zapisywany jest lokalnie w pliku `token.json`. Nie udostępniaj tego pliku publicznie.
+- Skrypt używa wyłącznie trybów odczytu API (readonly scopes).
diff --git a/app/main.py b/app/main.py
new file mode 100644
index 0000000..0064fad
--- /dev/null
+++ b/app/main.py
@@ -0,0 +1,252 @@
+"""
+CLI aggregator for Gmail, Google Tasks, Google Calendar, and a dedicated
+"Habits" task list. Uses OAuth2 with Google APIs and stores a local
+refreshable token once authenticated.
+"""
+from __future__ import annotations
+
+import argparse
+import datetime as dt
+from dataclasses import dataclass
+from pathlib import Path
+from typing import List, Optional
+
+from google.auth.transport.requests import Request
+from google.oauth2.credentials import Credentials
+from google_auth_oauthlib.flow import InstalledAppFlow
+from googleapiclient.discovery import build
+from googleapiclient.errors import HttpError
+
+
+SCOPES = [
+    "https://www.googleapis.com/auth/gmail.readonly",
+    "https://www.googleapis.com/auth/tasks.readonly",
+    "https://www.googleapis.com/auth/calendar.readonly",
+]
+
+
+@dataclass
+class GmailMessage:
+    sender: str
+    subject: str
+    date: str
+
+
+@dataclass
+class TaskItem:
+    title: str
+    status: str
+    due: Optional[str]
+
+
+@dataclass
+class CalendarEvent:
+    summary: str
+    start: str
+    end: str
+
+
+def load_credentials(credentials_path: Path, token_path: Path) -> Credentials:
+    creds: Optional[Credentials] = None
+    if token_path.exists():
+        creds = Credentials.from_authorized_user_file(token_path, SCOPES)
+
+    if creds and creds.valid:
+        return creds
+
+    if creds and creds.expired and creds.refresh_token:
+        creds.refresh(Request())
+        token_path.write_text(creds.to_json())
+        return creds
+
+    flow = InstalledAppFlow.from_client_secrets_file(str(credentials_path), SCOPES)
+    creds = flow.run_local_server(port=0)
+    token_path.write_text(creds.to_json())
+    return creds
+
+
+def fetch_gmail_messages(service, max_results: int = 5) -> List[GmailMessage]:
+    try:
+        results = (
+            service.users()
+            .messages()
+            .list(userId="me", labelIds=["INBOX"], maxResults=max_results)
+            .execute()
+        )
+    except HttpError as exc:  # pragma: no cover - runtime error path
+        raise RuntimeError(f"Gmail API error: {exc}") from exc
+
+    messages = []
+    for meta in results.get("messages", []):
+        msg = service.users().messages().get(userId="me", id=meta["id"]).execute()
+        headers = {h["name"].lower(): h["value"] for h in msg.get("payload", {}).get("headers", [])}
+        messages.append(
+            GmailMessage(
+                sender=headers.get("from", "(unknown)"),
+                subject=headers.get("subject", "(no subject)"),
+                date=headers.get("date", ""),
+            )
+        )
+    return messages
+
+
+def fetch_tasks(service, max_results: int = 10) -> List[TaskItem]:
+    try:
+        task_lists = service.tasklists().list(maxResults=20).execute().get("items", [])
+    except HttpError as exc:  # pragma: no cover - runtime error path
+        raise RuntimeError(f"Tasks API error: {exc}") from exc
+
+    items: List[TaskItem] = []
+    for task_list in task_lists:
+        tasks = (
+            service.tasks()
+            .list(tasklist=task_list["id"], maxResults=max_results, showCompleted=True)
+            .execute()
+            .get("items", [])
+        )
+        for task in tasks:
+            due_date = task.get("due")
+            items.append(
+                TaskItem(
+                    title=task.get("title", "(untitled)"),
+                    status=task.get("status", "unknown"),
+                    due=due_date,
+                )
+            )
+    return items
+
+
+def fetch_habits(service, list_name: str = "Habits", max_results: int = 20) -> List[TaskItem]:
+    try:
+        task_lists = service.tasklists().list(maxResults=50).execute().get("items", [])
+    except HttpError as exc:  # pragma: no cover - runtime error path
+        raise RuntimeError(f"Tasks API error: {exc}") from exc
+
+    habits_list = next((tl for tl in task_lists if tl.get("title") == list_name), None)
+    if not habits_list:
+        return []
+
+    tasks = (
+        service.tasks()
+        .list(tasklist=habits_list["id"], maxResults=max_results, showCompleted=True)
+        .execute()
+        .get("items", [])
+    )
+    habits: List[TaskItem] = []
+    for task in tasks:
+        habits.append(
+            TaskItem(
+                title=task.get("title", "(untitled)"),
+                status=task.get("status", "unknown"),
+                due=task.get("due"),
+            )
+        )
+    return habits
+
+
+def fetch_calendar_events(service, days: int = 7, max_results: int = 15) -> List[CalendarEvent]:
+    now = dt.datetime.utcnow().isoformat() + "Z"
+    end = (dt.datetime.utcnow() + dt.timedelta(days=days)).isoformat() + "Z"
+    try:
+        events_result = (
+            service.events()
+            .list(
+                calendarId="primary",
+                timeMin=now,
+                timeMax=end,
+                maxResults=max_results,
+                singleEvents=True,
+                orderBy="startTime",
+            )
+            .execute()
+        )
+    except HttpError as exc:  # pragma: no cover - runtime error path
+        raise RuntimeError(f"Calendar API error: {exc}") from exc
+
+    events = []
+    for event in events_result.get("items", []):
+        start = event.get("start", {}).get("dateTime") or event.get("start", {}).get("date")
+        end_time = event.get("end", {}).get("dateTime") or event.get("end", {}).get("date")
+        events.append(
+            CalendarEvent(
+                summary=event.get("summary", "(no title)"),
+                start=start or "",  # type: ignore[arg-type]
+                end=end_time or "",  # type: ignore[arg-type]
+            )
+        )
+    return events
+
+
+def print_section(title: str):
+    print(f"\n{title}\n" + "-" * len(title))
+
+
+def render_messages(messages: List[GmailMessage]):
+    if not messages:
+        print("Brak nowych wiadomości.")
+        return
+    for message in messages:
+        print(f"{message.date} | {message.sender} | {message.subject}")
+
+
+def render_tasks(tasks: List[TaskItem]):
+    if not tasks:
+        print("Brak zadań.")
+        return
+    for task in tasks:
+        due_text = f" (termin: {task.due})" if task.due else ""
+        print(f"[{task.status}] {task.title}{due_text}")
+
+
+def render_events(events: List[CalendarEvent]):
+    if not events:
+        print("Brak wydarzeń w najbliższym czasie.")
+        return
+    for event in events:
+        print(f"{event.start} -> {event.end}: {event.summary}")
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Pobiera Gmail, Google Tasks, Google Calendar oraz listę nawyków (Habits).",
+    )
+    parser.add_argument(
+        "--credentials",
+        type=Path,
+        default=Path("credentials.json"),
+        help="Ścieżka do pliku credentials.json pobranego z Google Cloud Console.",
+    )
+    parser.add_argument(
+        "--token",
+        type=Path,
+        default=Path("token.json"),
+        help="Ścieżka do lokalnego pliku token.json na potrzeby odświeżania dostępu.",
+    )
+    args = parser.parse_args()
+
+    if not args.credentials.exists():
+        raise SystemExit(
+            "Brakuje pliku credentials.json. Pobierz plik OAuth 2.0 Client ID z Google Cloud Console "
+            "i wskaż go flagą --credentials."
+        )
+
+    creds = load_credentials(args.credentials, args.token)
+    gmail_service = build("gmail", "v1", credentials=creds)
+    tasks_service = build("tasks", "v1", credentials=creds)
+    calendar_service = build("calendar", "v3", credentials=creds)
+
+    print_section("📨 Gmail (ostatnie wiadomości)")
+    render_messages(fetch_gmail_messages(gmail_service))
+
+    print_section("✅ Google Tasks")
+    render_tasks(fetch_tasks(tasks_service))
+
+    print_section("📅 Google Calendar (7 dni)")
+    render_events(fetch_calendar_events(calendar_service))
+
+    print_section("🧠 Nawykowa lista 'Habits'")
+    render_tasks(fetch_habits(tasks_service))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..3067577
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,3 @@
+google-api-python-client
+google-auth
+google-auth-oauthlib