feat: send mobile deadline reminders (Closes #709)

frontend/dashboard.js

@@ -6044,6 +6044,8 @@
       const controller = createPushNotifications({
         control:qs('#push-updates'),
         status:qs('#push-update-status'),
+        deadlineControl:qs('#push-deadlines'),
+        deadlineStatus:qs('#push-deadline-status'),
         notification:window.Notification,
         serviceWorker:navigator.serviceWorker,
         fetchJson:fetchReviewJson,

frontend/index.html

@@ -129,6 +129,8 @@
             <label for="delivery-receipts"><input id="delivery-receipts" type="checkbox" /> Notify me when queued work finishes</label>
             <label class="push-update-control" for="push-updates"><input id="push-updates" type="checkbox" /> Notify me about new updates</label>
             <span class="small" id="push-update-status" role="status" aria-live="polite"></span>
+            <label class="push-update-control" for="push-deadlines"><input id="push-deadlines" type="checkbox" /> Notify me about deadlines</label>
+            <span class="small" id="push-deadline-status" role="status" aria-live="polite"></span>
             <button id="clear-offline-work" type="button">Clear offline work data</button>
             <button id="retry-offline-storage" type="button" hidden>Retry offline saving</button>
             <span class="small" id="offline-work-status" role="status" aria-live="polite"></span>

frontend/push-notifications.js

@@ -2,7 +2,7 @@
   if (typeof module === 'object' && module.exports) module.exports = factory;
   else root.createPushNotifications = factory;
 })(typeof self !== 'undefined' ? self : this, function createPushNotifications({
-  control, status, notification, serviceWorker, fetchJson,
+  control, status, deadlineControl, deadlineStatus, notification, serviceWorker, fetchJson,
 }) {
   let configuration = null;
 
@@ -20,7 +20,9 @@
     await fetchJson('api/v1/push-subscription', {method:'DELETE'});
     await subscription?.unsubscribe?.();
     control.checked = false;
+    if (deadlineControl) deadlineControl.checked = false;
     status.textContent = 'New update notifications are off for this device.';
+    if (deadlineStatus) deadlineStatus.textContent = 'Deadline reminders are off for this device.';
   }
 
   async function enable() {
@@ -60,20 +62,53 @@
     }
   }
 
+  async function changeDeadline() {
+    deadlineControl.disabled = true;
+    try {
+      const registration = await serviceWorker.ready;
+      const subscription = await registration.pushManager.getSubscription();
+      if (deadlineControl.checked && !subscription) {
+        deadlineControl.checked = false;
+        deadlineStatus.textContent = 'Enable new update notifications first.';
+        return;
+      }
+      const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone || 'UTC';
+      await fetchJson('api/v1/push-subscription/deadlines', {
+        method:'PUT',
+        headers:{'Content-Type':'application/json'},
+        body:JSON.stringify({enabled:deadlineControl.checked, timezone, reminder_hour:9}),
+      });
+      deadlineStatus.textContent = deadlineControl.checked
+        ? 'Deadline reminders enabled for 9:00 local time.'
+        : 'Deadline reminders are off for this device.';
+    } catch (error) {
+      deadlineControl.checked = !deadlineControl.checked;
+      deadlineStatus.textContent = 'Could not change deadline reminders. Check your connection and try again.';
+    } finally {
+      deadlineControl.disabled = false;
+    }
+  }
+
   async function init() {
     if (!control || !notification || !serviceWorker) return;
     control.addEventListener('change', change);
+    deadlineControl?.addEventListener('change', changeDeadline);
     configuration = await fetchJson('api/v1/push-subscription');
     if (!configuration.available) {
       control.disabled = true;
+      if (deadlineControl) deadlineControl.disabled = true;
       status.textContent = 'New update notifications are not available on this server.';
       return;
     }
     control.checked = Boolean(configuration.subscribed);
+    if (deadlineControl) deadlineControl.checked = Boolean(configuration.deadline_enabled);
     status.textContent = configuration.subscribed
       ? 'New update notifications enabled for this device.'
       : 'New update notifications are off for this device.';
+    if (deadlineStatus) deadlineStatus.textContent = configuration.deadline_enabled
+      ? `Deadline reminders enabled for ${configuration.reminder_hour}:00 local time.`
+      : 'Deadline reminders are off for this device.';
   }
 
-  return {init, change};
+  return {init, change, changeDeadline};
 });

frontend/service-worker.js

@@ -316,6 +316,24 @@ self.addEventListener('push', event => {
   const tag = String(payload.tag || '');
   const notificationId = Number(payload.notification_id);
   const updateCount = Number(payload.update_count);
+  const deadlineCount = Number(payload.deadline_count);
+  if (
+    route === '#/my-work/agenda'
+    && /^stackchain-deadline-digest-\d{4}-\d{2}-\d{2}$/.test(tag)
+    && Number.isSafeInteger(deadlineCount)
+    && deadlineCount > 0
+    && deadlineCount <= 50
+  ) {
+    event.waitUntil(self.registration.showNotification(
+      deadlineCount + ' deadline' + (deadlineCount === 1 ? '' : 's') + ' need' + (deadlineCount === 1 ? 's' : '') + ' attention',
+      {
+        body: 'Open Agenda to review or replan ' + (deadlineCount === 1 ? 'it.' : 'them.'),
+        tag,
+        data: {route},
+      }
+    ));
+    return;
+  }
   if (
     route === '#/my-work/updates'
     && tag === 'stackchain-update-digest'

src/gitea_proxy.py

@@ -403,6 +403,17 @@ async def work_page(stream: str, page: int = 1, limit: int = 50) -> dict:
     }
 
 
+async def assigned_issue_snapshot(*, limit: int = 50, max_pages: int = 20) -> dict:
+    """Load a complete, bounded assigned-issue snapshot for deadline dispatch."""
+    items = []
+    for page in range(1, max_pages + 1):
+        result = await work_page("issue", page, limit)
+        items.extend(result["items"])
+        if not result["has_more"]:
+            return {"items": items, "complete": True}
+    return {"items": [], "complete": False}
+
+
 def _normalize_global_search_item(item: Any, kind: str) -> dict | None:
     if not isinstance(item, dict):
         return None

src/main.py

@@ -48,7 +48,11 @@ from src.live_snapshot_store import (
 )
 from src.models import Issue, Milestone, PullRequest, Repo, User
 from src.passkey_store import PasskeyStore
-from src.push_notifications import PushConfiguration, dispatch_unread_updates
+from src.push_notifications import (
+    PushConfiguration,
+    dispatch_deadline_reminders,
+    dispatch_unread_updates,
+)
 from src.push_endpoint_policy import UnsafePushEndpoint, validate_public_push_endpoint
 from src.push_subscription_store import PushSubscriptionStore
 from src.request_boundary import RequestBodyLimitMiddleware, request_body_limit
@@ -112,6 +116,13 @@ async def _push_poll_loop() -> None:
                 max_concurrency=max_concurrency,
                 max_individual_notifications=max_individual_notifications,
             )
+            await dispatch_deadline_reminders(
+                _push_subscription_store,
+                _push_configuration(),
+                gitea_proxy.assigned_issue_snapshot,
+                session_active=dashboard_auth.managed_session_active,
+                send_timeout_seconds=send_timeout,
+            )
         except asyncio.CancelledError:
             raise
         except Exception:
@@ -346,6 +357,23 @@ class PushSubscriptionPayload(BaseModel):
         return value
 
 
+class DeadlineReminderPayload(BaseModel):
+    enabled: bool
+    timezone: str = Field(min_length=1, max_length=64)
+    reminder_hour: int = Field(default=9, ge=0, le=23)
+
+    @field_validator("timezone")
+    @classmethod
+    def validate_timezone(cls, value: str) -> str:
+        from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
+
+        try:
+            ZoneInfo(value)
+        except ZoneInfoNotFoundError as error:
+            raise ValueError("Valid IANA timezone required") from error
+        return value
+
+
 StepUpAction = Literal[
     "merge_pull",
     "submit_pull_review",
@@ -1868,10 +1896,16 @@ async def push_status(request: Request):
         _push_subscription_store.is_subscribed,
         device_id,
     )
+    preferences = await asyncio.to_thread(
+        _push_subscription_store.deadline_preferences, device_id
+    )
     return {
         "available": configuration.enabled,
         "subscribed": subscribed,
         "public_key": configuration.public_key if configuration.enabled else "",
+        "deadline_enabled": preferences["enabled"],
+        "timezone": preferences["timezone"],
+        "reminder_hour": preferences["reminder_hour"],
     }
 
 
@@ -1925,6 +1959,29 @@ async def unsubscribe_push(request: Request):
     return {"subscribed": False}
 
 
+@app.put("/api/v1/push-subscription/deadlines")
+async def update_deadline_reminders(payload: DeadlineReminderPayload, request: Request):
+    device_id = await dashboard_auth.session_management_id(
+        request.state.dashboard_session
+    )
+    if payload.enabled and not await asyncio.to_thread(
+        _push_subscription_store.is_subscribed, device_id
+    ):
+        raise HTTPException(status_code=409, detail="Enable device notifications first")
+    await asyncio.to_thread(
+        _push_subscription_store.set_deadline_preferences,
+        device_id,
+        enabled=payload.enabled,
+        timezone=payload.timezone,
+        reminder_hour=payload.reminder_hour,
+    )
+    return {
+        "deadline_enabled": payload.enabled,
+        "timezone": payload.timezone,
+        "reminder_hour": payload.reminder_hour,
+    }
+
+
 @app.post("/api/v1/session/activity")
 async def record_session_activity(request: Request):
     session = request.state.dashboard_session

src/push_notifications.py

@@ -3,7 +3,9 @@ import json
 import secrets
 import time
 from dataclasses import dataclass
+from datetime import datetime, timedelta, timezone
 from typing import Awaitable, Callable
+from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
 
 from src.push_subscription_store import PushSubscriptionStore
 from src.push_endpoint_policy import UnsafePushEndpoint, validate_public_push_endpoint
@@ -234,3 +236,97 @@ async def dispatch_unread_updates(
         return sum(counts)
     finally:
         await asyncio.to_thread(store.release_dispatch_lease, owner)
+
+
+async def dispatch_deadline_reminders(
+    store: PushSubscriptionStore,
+    configuration: PushConfiguration,
+    assigned: Callable[[], Awaitable[dict]],
+    send: Callable[[dict, str], Awaitable[None]] | None = None,
+    **kwargs,
+) -> int:
+    owner = secrets.token_urlsafe(18)
+    acquired = await asyncio.to_thread(
+        store.acquire_dispatch_lease,
+        owner,
+        now=time.time(),
+        lease_seconds=max(15.0, float(kwargs.get("send_timeout_seconds", 10.0)) + 5.0),
+    )
+    if not acquired:
+        return 0
+    try:
+        return await _dispatch_deadline_reminders_unlocked(
+            store, configuration, assigned, send, **kwargs
+        )
+    finally:
+        await asyncio.to_thread(store.release_dispatch_lease, owner)
+
+
+async def _dispatch_deadline_reminders_unlocked(
+    store: PushSubscriptionStore,
+    configuration: PushConfiguration,
+    assigned: Callable[[], Awaitable[dict]],
+    send: Callable[[dict, str], Awaitable[None]] | None = None,
+    *,
+    now: datetime | None = None,
+    session_active: Callable[[str], Awaitable[bool]] | None = None,
+    send_timeout_seconds: float = 10.0,
+) -> int:
+    """Send one privacy-safe Agenda digest per eligible device and local day."""
+    if not configuration.enabled:
+        return 0
+    devices = await asyncio.to_thread(store.deadline_reminder_devices)
+    if not devices:
+        return 0
+    snapshot = await assigned()
+    if snapshot.get("complete") is False:
+        return 0
+    current = now or datetime.now(timezone.utc)
+    due_cutoff = current + timedelta(hours=48)
+    due_count = 0
+    for item in snapshot.get("items", []):
+        if not isinstance(item, dict) or not item.get("due_date"):
+            continue
+        try:
+            due = datetime.fromisoformat(str(item["due_date"]).replace("Z", "+00:00"))
+        except ValueError:
+            continue
+        if due.tzinfo is None:
+            due = due.replace(tzinfo=timezone.utc)
+        if due <= due_cutoff:
+            due_count += 1
+    if not due_count:
+        return 0
+    delivered = 0
+    for device in devices:
+        try:
+            local_now = current.astimezone(ZoneInfo(device.timezone))
+        except ZoneInfoNotFoundError:
+            continue
+        local_day = local_now.date().isoformat()
+        if local_now.hour < device.reminder_hour or device.delivered_local_day == local_day:
+            continue
+        if session_active is not None and not await session_active(device.session_id):
+            await asyncio.to_thread(store.delete_session, device.session_id)
+            continue
+        payload = json.dumps({
+            "title": f"{due_count} deadline{'s' if due_count != 1 else ''} need{'s' if due_count == 1 else ''} attention",
+            "body": f"Open Agenda to review or replan {'it' if due_count == 1 else 'them'}.",
+            "route": "#/my-work/agenda",
+            "tag": f"stackchain-deadline-digest-{local_day}",
+            "deadline_count": due_count,
+        }, separators=(",", ":"))
+        try:
+            operation = (
+                send(device.subscription, payload)
+                if send is not None
+                else send_web_push(device.subscription, payload, configuration)
+            )
+            await asyncio.wait_for(operation, timeout=send_timeout_seconds)
+        except Exception:
+            continue
+        await asyncio.to_thread(
+            store.mark_deadline_reminder_delivered, device.session_id, local_day
+        )
+        delivered += 1
+    return delivered

src/push_subscription_store.py

@@ -22,6 +22,15 @@ class PushDelivery:
         return tuple(thread_id for thread_id, _revision in self.digest_revisions)
 
 
+@dataclass(frozen=True)
+class DeadlineReminderDevice:
+    session_id: str
+    subscription: dict
+    timezone: str
+    reminder_hour: int
+    delivered_local_day: str | None
+
+
 def _revisions(
     values: Mapping[int, str] | Iterable[int | tuple[int, str]],
 ) -> tuple[tuple[int, str], ...]:
@@ -78,6 +87,15 @@ class PushSubscriptionStore:
                     FOREIGN KEY (session_id) REFERENCES push_subscriptions(session_id)
                         ON DELETE CASCADE
                 );
+                CREATE TABLE IF NOT EXISTS push_deadline_preferences (
+                    session_id TEXT PRIMARY KEY,
+                    enabled INTEGER NOT NULL DEFAULT 0,
+                    timezone TEXT NOT NULL DEFAULT 'UTC',
+                    reminder_hour INTEGER NOT NULL DEFAULT 9,
+                    delivered_local_day TEXT,
+                    FOREIGN KEY (session_id) REFERENCES push_subscriptions(session_id)
+                        ON DELETE CASCADE
+                );
                 """
             )
             delivery_columns = {
@@ -154,6 +172,56 @@ class PushSubscriptionStore:
                 "SELECT 1 FROM push_subscriptions WHERE session_id = ?", (session_id,)
             ).fetchone() is not None
 
+    def set_deadline_preferences(
+        self, session_id: str, *, enabled: bool, timezone: str, reminder_hour: int
+    ) -> None:
+        with self._connect() as connection:
+            connection.execute(
+                """INSERT INTO push_deadline_preferences(
+                       session_id, enabled, timezone, reminder_hour
+                   ) VALUES (?, ?, ?, ?)
+                   ON CONFLICT(session_id) DO UPDATE SET
+                       enabled = excluded.enabled,
+                       timezone = excluded.timezone,
+                       reminder_hour = excluded.reminder_hour""",
+                (session_id, int(enabled), timezone, reminder_hour),
+            )
+
+    def deadline_preferences(self, session_id: str) -> dict:
+        with self._connect() as connection:
+            row = connection.execute(
+                """SELECT enabled, timezone, reminder_hour
+                   FROM push_deadline_preferences WHERE session_id = ?""",
+                (session_id,),
+            ).fetchone()
+        return {
+            "enabled": bool(row[0]) if row else False,
+            "timezone": row[1] if row else "UTC",
+            "reminder_hour": row[2] if row else 9,
+        }
+
+    def deadline_reminder_devices(self) -> list[DeadlineReminderDevice]:
+        with self._connect() as connection:
+            rows = connection.execute(
+                """SELECT s.session_id, s.subscription_json, p.timezone,
+                          p.reminder_hour, p.delivered_local_day
+                   FROM push_subscriptions s
+                   JOIN push_deadline_preferences p ON p.session_id = s.session_id
+                   WHERE p.enabled = 1 ORDER BY s.session_id"""
+            ).fetchall()
+        return [
+            DeadlineReminderDevice(row[0], json.loads(row[1]), row[2], row[3], row[4])
+            for row in rows
+        ]
+
+    def mark_deadline_reminder_delivered(self, session_id: str, local_day: str) -> None:
+        with self._connect() as connection:
+            connection.execute(
+                """UPDATE push_deadline_preferences SET delivered_local_day = ?
+                   WHERE session_id = ? AND enabled = 1""",
+                (local_day, session_id),
+            )
+
     def claim_unseen(
         self, thread_revisions: Mapping[int, str] | Iterable[int | tuple[int, str]]
     ) -> list[PushDelivery]:

tests/test_deadline_reminders.py

@@ -0,0 +1,162 @@
+import json
+from datetime import datetime, timezone
+
+import pytest
+
+from src import gitea_proxy
+from src.push_notifications import PushConfiguration, dispatch_deadline_reminders
+from src.push_subscription_store import PushSubscriptionStore
+
+
+@pytest.mark.anyio
+async def test_deadline_reminder_sends_one_private_local_day_digest_and_deduplicates(tmp_path):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    store.upsert("device-a", {
+        "endpoint": "https://push.example/device-a",
+        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+    })
+    store.set_deadline_preferences(
+        "device-a", enabled=True, timezone="America/New_York", reminder_hour=9
+    )
+    sent = []
+
+    async def assigned():
+        return {
+            "complete": True,
+            "items": [
+                {
+                    "id": 42,
+                    "title": "Private launch plan",
+                    "repository": {"full_name": "private/repo"},
+                    "due_date": "2026-08-14T12:00:00Z",
+                },
+                {"id": 43, "due_date": "2026-08-20T12:00:00Z"},
+            ],
+        }
+
+    async def send(_subscription, payload):
+        sent.append(json.loads(payload))
+
+    config = PushConfiguration("public", "private", "mailto:ops@example.com")
+    now = datetime(2026, 8, 13, 13, 5, tzinfo=timezone.utc)
+
+    assert await dispatch_deadline_reminders(store, config, assigned, send, now=now) == 1
+    assert await dispatch_deadline_reminders(store, config, assigned, send, now=now) == 0
+    assert sent == [{
+        "title": "1 deadline needs attention",
+        "body": "Open Agenda to review or replan it.",
+        "route": "#/my-work/agenda",
+        "tag": "stackchain-deadline-digest-2026-08-13",
+        "deadline_count": 1,
+    }]
+    assert "Private launch plan" not in json.dumps(sent)
+    assert "private/repo" not in json.dumps(sent)
+
+
+@pytest.mark.anyio
+async def test_deadline_reminder_fails_closed_for_incomplete_snapshot_and_before_local_hour(tmp_path):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    store.upsert("device-a", {
+        "endpoint": "https://push.example/device-a",
+        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+    })
+    store.set_deadline_preferences(
+        "device-a", enabled=True, timezone="America/Los_Angeles", reminder_hour=9
+    )
+    sent = []
+
+    async def incomplete():
+        return {"complete": False, "items": [{"id": 42, "due_date": "2026-08-14T12:00:00Z"}]}
+
+    async def complete():
+        return {"complete": True, "items": [{"id": 42, "due_date": "2026-08-14T12:00:00Z"}]}
+
+    async def send(_subscription, payload):
+        sent.append(payload)
+
+    config = PushConfiguration("public", "private", "mailto:ops@example.com")
+    assert await dispatch_deadline_reminders(
+        store, config, incomplete, send,
+        now=datetime(2026, 8, 13, 18, 0, tzinfo=timezone.utc),
+    ) == 0
+    assert await dispatch_deadline_reminders(
+        store, config, complete, send,
+        now=datetime(2026, 8, 13, 15, 0, tzinfo=timezone.utc),
+    ) == 0
+    assert sent == []
+
+
+def test_deadline_preferences_persist_on_the_existing_device_subscription(tmp_path):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    store.upsert("device-a", {
+        "endpoint": "https://push.example/device-a",
+        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+    })
+
+    store.set_deadline_preferences(
+        "device-a", enabled=True, timezone="Europe/London", reminder_hour=8
+    )
+
+    assert store.deadline_preferences("device-a") == {
+        "enabled": True,
+        "timezone": "Europe/London",
+        "reminder_hour": 8,
+    }
+
+
+@pytest.mark.anyio
+async def test_assigned_deadline_snapshot_is_pagination_complete(monkeypatch):
+    pages = {
+        1: {"items": [{"id": 1}], "has_more": True},
+        2: {"items": [{"id": 2}], "has_more": False},
+    }
+
+    async def work_page(stream, page, limit):
+        assert stream == "issue"
+        assert limit == 50
+        return pages[page]
+
+    monkeypatch.setattr(gitea_proxy, "work_page", work_page)
+
+    assert await gitea_proxy.assigned_issue_snapshot() == {
+        "items": [{"id": 1}, {"id": 2}],
+        "complete": True,
+    }
+
+
+@pytest.mark.anyio
+async def test_competing_workers_send_one_deadline_digest(tmp_path):
+    path = tmp_path / "push.sqlite3"
+    first = PushSubscriptionStore(path)
+    second = PushSubscriptionStore(path)
+    first.upsert("device-a", {
+        "endpoint": "https://push.example/device-a",
+        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+    })
+    first.set_deadline_preferences(
+        "device-a", enabled=True, timezone="UTC", reminder_hour=9
+    )
+    sending = __import__("asyncio").Event()
+    release = __import__("asyncio").Event()
+    sent = []
+
+    async def assigned():
+        return {"complete": True, "items": [{"id": 1, "due_date": "2026-08-14T00:00:00Z"}]}
+
+    async def send(_subscription, payload):
+        sent.append(payload)
+        sending.set()
+        await release.wait()
+
+    config = PushConfiguration("public", "private", "mailto:ops@example.com")
+    now = datetime(2026, 8, 13, 10, 0, tzinfo=timezone.utc)
+    active = __import__("asyncio").create_task(
+        dispatch_deadline_reminders(first, config, assigned, send, now=now)
+    )
+    await sending.wait()
+    competing = await dispatch_deadline_reminders(second, config, assigned, send, now=now)
+    release.set()
+
+    assert competing == 0
+    assert await active == 1
+    assert len(sent) == 1

tests/test_push_frontend.py

@@ -14,6 +14,11 @@ const control = {
   checked:false, disabled:false,
   addEventListener:(_name, callback) => state.change = callback,
 };
+const deadlineControl = {
+  checked:false, disabled:false,
+  addEventListener:(_name, callback) => state.deadlineChange = callback,
+};
+const deadlineStatus = {set textContent(value) { state.deadlineText = value; }, get textContent() { return state.deadlineText; }};
 const status = {set textContent(value) { state.text = value; }, get textContent() { return state.text; }};
 const existing = {endpoint:'https://push.example/device', toJSON() { return {endpoint:this.endpoint, keys:{p256dh:'key',auth:'auth'}}; }};
 const registration = {pushManager:{
@@ -21,7 +26,7 @@ const registration = {pushManager:{
   subscribe: async options => { state.subscriptions.push(options); state.current=existing; return existing; },
 }};
 const feature = createPushNotifications({
-  control, status,
+  control, status, deadlineControl, deadlineStatus,
   notification: {permission:'default', requestPermission:async () => { state.prompts += 1; return state.permission || 'granted'; }},
   serviceWorker: {ready:Promise.resolve(registration)},
   fetchJson: async (url, options={}) => { state.requests.push([url,options.method || 'GET',options.body || '']); return state.server || {available:true,subscribed:false,public_key:'AQID'}; },
@@ -57,6 +62,26 @@ process.stdout.write(JSON.stringify(state));
     assert result["text"] == "New update notifications enabled for this device."
 
 
+def test_deadline_opt_in_reuses_subscription_and_sends_local_timezone_without_second_prompt():
+    result = run_scenario("""
+state.current = existing;
+state.server = {available:true,subscribed:true,deadline_enabled:false,public_key:'AQID'};
+await feature.init();
+deadlineControl.checked = true;
+await state.deadlineChange();
+process.stdout.write(JSON.stringify(state));
+""")
+
+    assert result["prompts"] == 0
+    assert result["subscriptions"] == []
+    assert result["requests"][-1][0:2] == ["api/v1/push-subscription/deadlines", "PUT"]
+    body = json.loads(result["requests"][-1][2])
+    assert body["enabled"] is True
+    assert body["reminder_hour"] == 9
+    assert isinstance(body["timezone"], str) and body["timezone"]
+    assert result["deadlineText"] == "Deadline reminders enabled for 9:00 local time."
+
+
 def test_mobile_dashboard_mounts_opt_in_and_precaches_its_controller():
     root = MODULE.parents[1]
     html = (root / "frontend" / "index.html").read_text()
@@ -68,6 +93,8 @@ def test_mobile_dashboard_mounts_opt_in_and_precaches_its_controller():
 
     assert 'id="push-updates"' in html
     assert 'id="push-update-status"' in html
+    assert 'id="push-deadlines"' in html
+    assert 'id="push-deadline-status"' in html
     assert '<script src="static/push-notifications.js"></script>' in html
     assert "createPushNotifications({" in dashboard
     assert "BASE + 'static/push-notifications.js'" in worker

tests/test_push_notifications.py

@@ -819,7 +819,12 @@ async def test_authenticated_device_can_subscribe_report_status_and_unsubscribe(
     )
 
     assert await main.push_status(request) == {
-        "available": True, "subscribed": False, "public_key": "public-vapid"
+        "available": True,
+        "subscribed": False,
+        "public_key": "public-vapid",
+        "deadline_enabled": False,
+        "timezone": "UTC",
+        "reminder_hour": 9,
     }
     assert await main.subscribe_push(payload, request) == {"subscribed": True}
     assert (await main.push_status(request))["subscribed"] is True
@@ -827,6 +832,32 @@ async def test_authenticated_device_can_subscribe_report_status_and_unsubscribe(
     assert (await main.push_status(request))["subscribed"] is False
 
 
+@pytest.mark.anyio
+async def test_authenticated_device_can_enable_deadline_reminders(tmp_path, monkeypatch):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    store.upsert("session-a", {
+        "endpoint": "https://push.example/device-a",
+        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+    })
+    monkeypatch.setattr(main, "_push_subscription_store", store)
+
+    async def management_id(_session):
+        return "session-a"
+
+    monkeypatch.setattr(main.dashboard_auth, "session_management_id", management_id)
+    request = SimpleNamespace(state=SimpleNamespace(dashboard_session=object()))
+    payload = main.DeadlineReminderPayload(
+        enabled=True, timezone="America/New_York", reminder_hour=9
+    )
+
+    assert await main.update_deadline_reminders(payload, request) == {
+        "deadline_enabled": True,
+        "timezone": "America/New_York",
+        "reminder_hour": 9,
+    }
+    assert store.deadline_preferences("session-a")["enabled"] is True
+
+
 @pytest.mark.anyio
 async def test_subscription_rejects_an_unsafe_endpoint_before_persistence(tmp_path, monkeypatch):
     store = PushSubscriptionStore(tmp_path / "push.sqlite3")

tests/test_service_worker.py

@@ -459,6 +459,32 @@ def test_update_digest_push_opens_unread_inbox_without_item_actions_or_private_c
     assert "must-not-render" not in json.dumps(result["notifications"])
 
 
+def test_deadline_digest_push_opens_agenda_without_rendering_private_copy():
+    result = run_worker_scenario(
+        """
+  await dispatchPush({
+    title:'must-not-render', body:'private details must-not-render',
+    tag:'stackchain-deadline-digest-2026-08-13', route:'#/my-work/agenda', deadline_count:3,
+  });
+  await dispatchNotificationClick('#/my-work/agenda');
+  process.stdout.write(JSON.stringify(state));
+"""
+    )
+
+    assert result["notifications"] == [{
+        "title": "3 deadlines need attention",
+        "options": {
+            "body": "Open Agenda to review or replan them.",
+            "tag": "stackchain-deadline-digest-2026-08-13",
+            "data": {"route": "#/my-work/agenda"},
+        },
+    }]
+    assert result["opened"] == [
+        "https://forge.example/dashboard/#/my-work/agenda"
+    ]
+    assert "must-not-render" not in json.dumps(result["notifications"])
+
+
 def test_push_mark_read_action_confirms_authenticated_mutation_without_opening_app():
     result = run_worker_scenario(
         """