feat: add desktop notifications and skills updates

server/modules/database/index.ts

@@ -4,6 +4,7 @@ export { apiKeysDb } from '@/modules/database/repositories/api-keys.js';
 export { appConfigDb } from '@/modules/database/repositories/app-config.js';
 export { credentialsDb } from '@/modules/database/repositories/credentials.js';
 export { githubTokensDb } from '@/modules/database/repositories/github-tokens.js';
+export { notificationChannelEndpointsDb } from '@/modules/database/repositories/notification-channel-endpoints.js';
 export { notificationPreferencesDb } from '@/modules/database/repositories/notification-preferences.js';
 export { projectsDb } from '@/modules/database/repositories/projects.db.js';
 export { pushSubscriptionsDb } from '@/modules/database/repositories/push-subscriptions.js';

server/modules/database/migrations.ts

@@ -3,6 +3,7 @@ import { Database } from 'better-sqlite3';
 import {
   APP_CONFIG_TABLE_SCHEMA_SQL,
   LAST_SCANNED_AT_SQL,
+  NOTIFICATION_CHANNEL_ENDPOINTS_TABLE_SCHEMA_SQL,
   PROJECTS_TABLE_SCHEMA_SQL,
   PUSH_SUBSCRIPTIONS_TABLE_SCHEMA_SQL,
   SESSIONS_TABLE_SCHEMA_SQL,
@@ -440,6 +441,9 @@ export const runMigrations = (db: Database) => {
     db.exec(VAPID_KEYS_TABLE_SCHEMA_SQL);
     db.exec(PUSH_SUBSCRIPTIONS_TABLE_SCHEMA_SQL);
     db.exec('CREATE INDEX IF NOT EXISTS idx_push_subscriptions_user_id ON push_subscriptions(user_id)');
+    db.exec(NOTIFICATION_CHANNEL_ENDPOINTS_TABLE_SCHEMA_SQL);
+    db.exec('CREATE INDEX IF NOT EXISTS idx_notification_channel_endpoints_user_channel ON notification_channel_endpoints(user_id, channel)');
+    db.exec('CREATE INDEX IF NOT EXISTS idx_notification_channel_endpoints_enabled ON notification_channel_endpoints(enabled)');
 
     db.exec(PROJECTS_TABLE_SCHEMA_SQL);
     rebuildProjectsTableWithPrimaryKeySchema(db);

server/modules/database/repositories/notification-channel-endpoints.ts

@@ -0,0 +1,153 @@
+import { getConnection } from '@/modules/database/connection.js';
+
+type NotificationChannelEndpointRow = {
+  id: number;
+  user_id: number;
+  channel: string;
+  endpoint_id: string;
+  label: string | null;
+  metadata_json: string | null;
+  enabled: number;
+  last_seen_at: string;
+  created_at: string;
+  updated_at: string;
+};
+
+type UpsertNotificationChannelEndpointInput = {
+  userId: number;
+  channel: string;
+  endpointId: string;
+  label?: string | null;
+  metadata?: Record<string, unknown> | null;
+  enabled?: boolean;
+};
+
+function normalizeRequiredText(value: unknown): string {
+  if (typeof value !== 'string') return '';
+  return value.trim();
+}
+
+function normalizeNullableText(value: unknown): string | null {
+  if (typeof value !== 'string') return null;
+  const normalized = value.trim();
+  return normalized || null;
+}
+
+function serializeMetadata(metadata: Record<string, unknown> | null | undefined): string | null {
+  if (!metadata || typeof metadata !== 'object') return null;
+  return JSON.stringify(metadata);
+}
+
+function parseMetadata(metadataJson: string | null): Record<string, unknown> {
+  if (!metadataJson) return {};
+  try {
+    const parsed = JSON.parse(metadataJson);
+    return parsed && typeof parsed === 'object' ? parsed as Record<string, unknown> : {};
+  } catch {
+    return {};
+  }
+}
+
+export const notificationChannelEndpointsDb = {
+  upsertEndpoint(input: UpsertNotificationChannelEndpointInput): NotificationChannelEndpointRow {
+    const channel = normalizeRequiredText(input.channel);
+    const endpointId = normalizeRequiredText(input.endpointId);
+    if (!channel) throw new Error('channel is required');
+    if (!endpointId) throw new Error('endpointId is required');
+
+    const enabled = input.enabled === false ? 0 : 1;
+    const db = getConnection();
+    db.prepare(
+      `INSERT INTO notification_channel_endpoints (
+         user_id,
+         channel,
+         endpoint_id,
+         label,
+         metadata_json,
+         enabled,
+         last_seen_at,
+         updated_at
+       )
+       VALUES (?, ?, ?, ?, ?, ?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+       ON CONFLICT(user_id, channel, endpoint_id) DO UPDATE SET
+         label = excluded.label,
+         metadata_json = excluded.metadata_json,
+         enabled = excluded.enabled,
+         last_seen_at = CURRENT_TIMESTAMP,
+         updated_at = CURRENT_TIMESTAMP`
+    ).run(
+      input.userId,
+      channel,
+      endpointId,
+      normalizeNullableText(input.label),
+      serializeMetadata(input.metadata),
+      enabled
+    );
+
+    return notificationChannelEndpointsDb.getEndpoint(input.userId, channel, endpointId)!;
+  },
+
+  getEndpoint(userId: number, channel: string, endpointId: string): NotificationChannelEndpointRow | null {
+    const db = getConnection();
+    const row = db.prepare(
+      `SELECT id, user_id, channel, endpoint_id, label, metadata_json, enabled, last_seen_at, created_at, updated_at
+       FROM notification_channel_endpoints
+       WHERE user_id = ? AND channel = ? AND endpoint_id = ?`
+    ).get(
+      userId,
+      normalizeRequiredText(channel),
+      normalizeRequiredText(endpointId)
+    ) as NotificationChannelEndpointRow | undefined;
+    return row || null;
+  },
+
+  getEndpoints(userId: number, channel: string): NotificationChannelEndpointRow[] {
+    const db = getConnection();
+    return db.prepare(
+      `SELECT id, user_id, channel, endpoint_id, label, metadata_json, enabled, last_seen_at, created_at, updated_at
+       FROM notification_channel_endpoints
+       WHERE user_id = ? AND channel = ?
+       ORDER BY last_seen_at DESC`
+    ).all(userId, normalizeRequiredText(channel)) as NotificationChannelEndpointRow[];
+  },
+
+  getEnabledEndpoints(userId: number, channel: string): NotificationChannelEndpointRow[] {
+    const db = getConnection();
+    return db.prepare(
+      `SELECT id, user_id, channel, endpoint_id, label, metadata_json, enabled, last_seen_at, created_at, updated_at
+       FROM notification_channel_endpoints
+       WHERE user_id = ? AND channel = ? AND enabled = 1
+       ORDER BY last_seen_at DESC`
+    ).all(userId, normalizeRequiredText(channel)) as NotificationChannelEndpointRow[];
+  },
+
+  setEndpointEnabled(userId: number, channel: string, endpointId: string, enabled: boolean): boolean {
+    const db = getConnection();
+    const result = db.prepare(
+      `UPDATE notification_channel_endpoints
+       SET enabled = ?, updated_at = CURRENT_TIMESTAMP
+       WHERE user_id = ? AND channel = ? AND endpoint_id = ?`
+    ).run(enabled ? 1 : 0, userId, normalizeRequiredText(channel), normalizeRequiredText(endpointId));
+    return result.changes > 0;
+  },
+
+  touchEndpoint(userId: number, channel: string, endpointId: string): boolean {
+    const db = getConnection();
+    const result = db.prepare(
+      `UPDATE notification_channel_endpoints
+       SET last_seen_at = CURRENT_TIMESTAMP
+       WHERE user_id = ? AND channel = ? AND endpoint_id = ?`
+    ).run(userId, normalizeRequiredText(channel), normalizeRequiredText(endpointId));
+    return result.changes > 0;
+  },
+
+  removeEndpoint(userId: number, channel: string, endpointId: string): boolean {
+    const db = getConnection();
+    const result = db.prepare(
+      'DELETE FROM notification_channel_endpoints WHERE user_id = ? AND channel = ? AND endpoint_id = ?'
+    ).run(userId, normalizeRequiredText(channel), normalizeRequiredText(endpointId));
+    return result.changes > 0;
+  },
+
+  parseMetadata,
+};

server/modules/database/repositories/notification-preferences.ts

@@ -10,7 +10,9 @@ type NotificationPreferences = {
   channels: {
     inApp: boolean;
     webPush: boolean;
+    desktop: boolean;
     sound: boolean;
+    [key: string]: boolean;
   };
   events: {
     actionRequired: boolean;
@@ -23,6 +25,7 @@ const DEFAULT_NOTIFICATION_PREFERENCES: NotificationPreferences = {
   channels: {
     inApp: false,
     webPush: false,
+    desktop: false,
     sound: true,
   },
   events: {
@@ -34,11 +37,20 @@ const DEFAULT_NOTIFICATION_PREFERENCES: NotificationPreferences = {
 
 function normalizeNotificationPreferences(value: unknown): NotificationPreferences {
   const source = value && typeof value === 'object' ? (value as Record<string, any>) : {};
+  const sourceChannels = source.channels && typeof source.channels === 'object'
+    ? source.channels as Record<string, unknown>
+    : {};
+  const extraChannels = Object.fromEntries(
+    Object.entries(sourceChannels)
+      .filter(([key, channelValue]) => !['inApp', 'webPush', 'desktop', 'sound'].includes(key) && typeof channelValue === 'boolean')
+  ) as Record<string, boolean>;
 
   return {
     channels: {
+      ...extraChannels,
       inApp: source.channels?.inApp === true,
       webPush: source.channels?.webPush === true,
+      desktop: source.channels?.desktop === true,
       sound: source.channels?.sound !== false,
     },
     events: {
@@ -103,4 +115,3 @@ export const notificationPreferencesDb = {
     return notificationPreferencesDb.updateNotificationPreferences(userId, preferences);
   },
 };
-

server/modules/database/schema.ts

@@ -69,6 +69,23 @@ CREATE TABLE IF NOT EXISTS push_subscriptions (
 );
 `;
 
+export const NOTIFICATION_CHANNEL_ENDPOINTS_TABLE_SCHEMA_SQL = `
+CREATE TABLE IF NOT EXISTS notification_channel_endpoints (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    user_id INTEGER NOT NULL,
+    channel TEXT NOT NULL,
+    endpoint_id TEXT NOT NULL,
+    label TEXT,
+    metadata_json TEXT,
+    enabled BOOLEAN DEFAULT 1,
+    last_seen_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(user_id, channel, endpoint_id),
+    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+);
+`;
+
 export const PROJECTS_TABLE_SCHEMA_SQL = `
 CREATE TABLE IF NOT EXISTS projects (
     project_id TEXT PRIMARY KEY NOT NULL,
@@ -144,6 +161,10 @@ ${VAPID_KEYS_TABLE_SCHEMA_SQL}
 ${PUSH_SUBSCRIPTIONS_TABLE_SCHEMA_SQL}
 CREATE INDEX IF NOT EXISTS idx_push_subscriptions_user_id ON push_subscriptions(user_id);
 
+${NOTIFICATION_CHANNEL_ENDPOINTS_TABLE_SCHEMA_SQL}
+CREATE INDEX IF NOT EXISTS idx_notification_channel_endpoints_user_channel ON notification_channel_endpoints(user_id, channel);
+CREATE INDEX IF NOT EXISTS idx_notification_channel_endpoints_enabled ON notification_channel_endpoints(enabled);
+
 ${PROJECTS_TABLE_SCHEMA_SQL}
 -- NOTE: These indexes are created in migrations after legacy table-shape repairs.
 -- Creating them here can fail on upgraded installs where projects lacks those columns.

server/modules/notifications/index.ts

@@ -0,0 +1,13 @@
+export {
+  buildNotificationPayload,
+  createNotificationEvent,
+  notifyUserIfEnabled,
+  notifyRunFailed,
+  notifyRunStopped,
+} from '@/modules/notifications/services/notification-orchestrator.service.js';
+export {
+  registerDesktopNotificationClient,
+  sendDesktopNotification,
+  unregisterDesktopNotificationClient,
+} from '@/modules/notifications/services/desktop-notification-clients.service.js';
+export { handleDesktopNotificationsConnection } from '@/modules/notifications/websocket/desktop-notifications-websocket.service.js';

server/modules/notifications/notifications.routes.ts

@@ -0,0 +1,127 @@
+import express from 'express';
+
+import { notificationChannelEndpointsDb, notificationPreferencesDb } from '@/modules/database/index.js';
+
+const router = express.Router();
+
+function readText(value: unknown): string {
+  return typeof value === 'string' ? value.trim() : '';
+}
+
+function sanitizeEndpoint(endpoint: any) {
+  return {
+    id: endpoint.id,
+    channel: endpoint.channel,
+    endpointId: endpoint.endpoint_id,
+    label: endpoint.label,
+    metadata: notificationChannelEndpointsDb.parseMetadata(endpoint.metadata_json),
+    enabled: Boolean(endpoint.enabled),
+    lastSeenAt: endpoint.last_seen_at,
+    createdAt: endpoint.created_at,
+    updatedAt: endpoint.updated_at,
+  };
+}
+
+function readUserId(req: express.Request): number {
+  const userId = Number((req as any).user?.id);
+  if (!Number.isInteger(userId) || userId <= 0) {
+    throw new Error('Authenticated user is missing');
+  }
+  return userId;
+}
+
+function updateChannelPreference(userId: number, channel: string): unknown {
+  const currentPrefs = notificationPreferencesDb.getPreferences(userId);
+  const hasEnabledEndpoint = notificationChannelEndpointsDb.getEnabledEndpoints(userId, channel).length > 0;
+  return notificationPreferencesDb.updatePreferences(userId, {
+    ...currentPrefs,
+    channels: { ...currentPrefs.channels, [channel]: hasEnabledEndpoint },
+  });
+}
+
+router.get('/endpoints', (req, res) => {
+  try {
+    const channel = readText(req.query.channel);
+    if (!channel) {
+      return res.status(400).json({ error: 'channel is required' });
+    }
+
+    const userId = readUserId(req);
+    const endpoints = notificationChannelEndpointsDb
+      .getEndpoints(userId, channel)
+      .map(sanitizeEndpoint);
+    return res.json({ success: true, endpoints });
+  } catch (error) {
+    console.error('Error fetching notification endpoints:', error);
+    return res.status(500).json({ error: 'Failed to fetch notification endpoints' });
+  }
+});
+
+router.post('/endpoints/current', (req, res) => {
+  try {
+    const { channel, endpointId, label, metadata = {}, enabled = true } = req.body || {};
+    const normalizedChannel = readText(channel);
+    const normalizedEndpointId = readText(endpointId);
+    if (!normalizedChannel || !normalizedEndpointId) {
+      return res.status(400).json({ error: 'channel and endpointId are required' });
+    }
+
+    const userId = readUserId(req);
+    const endpoint = notificationChannelEndpointsDb.upsertEndpoint({
+      userId,
+      channel: normalizedChannel,
+      endpointId: normalizedEndpointId,
+      label,
+      metadata: metadata && typeof metadata === 'object' ? metadata : {},
+      enabled: enabled !== false,
+    });
+
+    const preferences = updateChannelPreference(userId, normalizedChannel);
+    return res.json({ success: true, endpoint: sanitizeEndpoint(endpoint), preferences });
+  } catch (error) {
+    console.error('Error registering notification endpoint:', error);
+    return res.status(500).json({ error: 'Failed to register notification endpoint' });
+  }
+});
+
+router.patch('/endpoints/:channel/:endpointId', (req, res) => {
+  try {
+    const { channel, endpointId } = req.params;
+    const { enabled } = req.body || {};
+    if (typeof enabled !== 'boolean') {
+      return res.status(400).json({ error: 'enabled must be a boolean' });
+    }
+
+    const userId = readUserId(req);
+    const updated = notificationChannelEndpointsDb.setEndpointEnabled(userId, channel, endpointId, enabled);
+    if (!updated) {
+      return res.status(404).json({ error: 'Notification endpoint not found' });
+    }
+
+    const endpoint = notificationChannelEndpointsDb.getEndpoint(userId, channel, endpointId);
+    const preferences = updateChannelPreference(userId, channel);
+    return res.json({ success: true, endpoint: endpoint ? sanitizeEndpoint(endpoint) : null, preferences });
+  } catch (error) {
+    console.error('Error updating notification endpoint:', error);
+    return res.status(500).json({ error: 'Failed to update notification endpoint' });
+  }
+});
+
+router.delete('/endpoints/:channel/:endpointId', (req, res) => {
+  try {
+    const { channel, endpointId } = req.params;
+    const userId = readUserId(req);
+    const removed = notificationChannelEndpointsDb.removeEndpoint(userId, channel, endpointId);
+    if (!removed) {
+      return res.status(404).json({ error: 'Notification endpoint not found' });
+    }
+
+    const preferences = updateChannelPreference(userId, channel);
+    return res.json({ success: true, preferences });
+  } catch (error) {
+    console.error('Error removing notification endpoint:', error);
+    return res.status(500).json({ error: 'Failed to remove notification endpoint' });
+  }
+});
+
+export default router;

server/modules/notifications/services/desktop-notification-clients.service.ts

@@ -0,0 +1,124 @@
+import type { WebSocket } from 'ws';
+
+import { notificationChannelEndpointsDb } from '@/modules/database/index.js';
+
+const DESKTOP_CHANNEL = 'desktop';
+
+const clientsByUserId = new Map<number, Map<string, WebSocket>>();
+const clientBySocket = new WeakMap<WebSocket, { userId: number; endpointId: string }>();
+
+function normalizeUserId(userId: unknown): number | null {
+  const numeric = Number(userId);
+  return Number.isInteger(numeric) && numeric > 0 ? numeric : null;
+}
+
+function normalizeEndpointId(endpointId: unknown): string {
+  if (typeof endpointId !== 'string') return '';
+  return endpointId.trim();
+}
+
+function getUserClients(userId: unknown, create = false): Map<string, WebSocket> | null {
+  const normalizedUserId = normalizeUserId(userId);
+  if (!normalizedUserId) return null;
+  let clients = clientsByUserId.get(normalizedUserId);
+  if (!clients && create) {
+    clients = new Map();
+    clientsByUserId.set(normalizedUserId, clients);
+  }
+  return clients || null;
+}
+
+export function registerDesktopNotificationClient({
+  userId,
+  deviceId,
+  label = null,
+  platform = null,
+  appVersion = null,
+  ws,
+}: {
+  userId: number;
+  deviceId: string;
+  label?: string | null;
+  platform?: string | null;
+  appVersion?: string | null;
+  ws: WebSocket;
+}) {
+  const normalizedUserId = normalizeUserId(userId);
+  const endpointId = normalizeEndpointId(deviceId);
+  if (!normalizedUserId || !endpointId) {
+    return false;
+  }
+
+  const endpoint = notificationChannelEndpointsDb.upsertEndpoint({
+    userId: normalizedUserId,
+    channel: DESKTOP_CHANNEL,
+    endpointId,
+    label,
+    metadata: { platform, appVersion },
+    enabled: true,
+  });
+
+  const clients = getUserClients(normalizedUserId, true)!;
+  const previous = clients.get(endpointId);
+  if (previous && previous !== ws && previous.readyState === previous.OPEN) {
+    previous.close(4000, 'Device reconnected');
+  }
+
+  clients.set(endpointId, ws);
+  clientBySocket.set(ws, { userId: normalizedUserId, endpointId });
+  return endpoint;
+}
+
+export function unregisterDesktopNotificationClient(ws: WebSocket): void {
+  const registration = clientBySocket.get(ws);
+  if (!registration) return;
+
+  const clients = getUserClients(registration.userId);
+  if (clients?.get(registration.endpointId) === ws) {
+    clients.delete(registration.endpointId);
+    if (clients.size === 0) {
+      clientsByUserId.delete(registration.userId);
+    }
+  }
+  clientBySocket.delete(ws);
+}
+
+export function sendDesktopNotification(userId: unknown, payload: unknown): { attempted: number; sent: number } {
+  const normalizedUserId = normalizeUserId(userId);
+  if (!normalizedUserId) return { attempted: 0, sent: 0 };
+
+  const clients = getUserClients(normalizedUserId);
+  if (!clients?.size) return { attempted: 0, sent: 0 };
+
+  const enabledEndpointIds = new Set(
+    notificationChannelEndpointsDb
+      .getEnabledEndpoints(normalizedUserId, DESKTOP_CHANNEL)
+      .map((endpoint) => endpoint.endpoint_id)
+  );
+
+  const message = JSON.stringify({
+    type: 'notification',
+    id: typeof (payload as any)?.data?.tag === 'string' ? (payload as any).data.tag : `${Date.now()}`,
+    payload,
+  });
+
+  let attempted = 0;
+  let sent = 0;
+  for (const [endpointId, ws] of clients.entries()) {
+    if (!enabledEndpointIds.has(endpointId)) continue;
+    attempted += 1;
+    if (ws.readyState !== ws.OPEN) {
+      unregisterDesktopNotificationClient(ws);
+      continue;
+    }
+    try {
+      ws.send(message);
+      notificationChannelEndpointsDb.touchEndpoint(normalizedUserId, DESKTOP_CHANNEL, endpointId);
+      sent += 1;
+    } catch {
+      unregisterDesktopNotificationClient(ws);
+    }
+  }
+
+  return { attempted, sent };
+}

server/modules/notifications/services/notification-orchestrator.service.js

@@ -0,0 +1,288 @@
+import webPush from 'web-push';
+
+import { notificationPreferencesDb, pushSubscriptionsDb, sessionsDb } from '@/modules/database/index.js';
+import { sendDesktopNotification as sendDesktopNotificationToClients } from '@/modules/notifications/services/desktop-notification-clients.service.js';
+
+const KIND_TO_PREF_KEY = {
+  action_required: 'actionRequired',
+  stop: 'stop',
+  error: 'error'
+};
+
+const PROVIDER_LABELS = {
+  claude: 'Claude',
+  cursor: 'Cursor',
+  codex: 'Codex',
+  gemini: 'Gemini',
+  system: 'System'
+};
+
+const recentEventKeys = new Map();
+const DEDUPE_WINDOW_MS = 20000;
+
+const cleanupOldEventKeys = () => {
+  const now = Date.now();
+  for (const [key, timestamp] of recentEventKeys.entries()) {
+    if (now - timestamp > DEDUPE_WINDOW_MS) {
+      recentEventKeys.delete(key);
+    }
+  }
+};
+
+function isNotificationEventEnabled(preferences, event) {
+  const prefEventKey = KIND_TO_PREF_KEY[event.kind];
+  const eventEnabled = prefEventKey ? Boolean(preferences?.events?.[prefEventKey]) : true;
+
+  return eventEnabled;
+}
+
+function isDuplicate(event) {
+  cleanupOldEventKeys();
+  const key = event.dedupeKey || `${event.provider}:${event.kind || 'info'}:${event.code || 'generic'}:${event.sessionId || 'none'}`;
+  if (recentEventKeys.has(key)) {
+    return true;
+  }
+  recentEventKeys.set(key, Date.now());
+  return false;
+}
+
+function createNotificationEvent({
+  provider,
+  sessionId = null,
+  kind = 'info',
+  code = 'generic.info',
+  meta = {},
+  severity = 'info',
+  dedupeKey = null,
+  requiresUserAction = false
+}) {
+  return {
+    provider,
+    sessionId,
+    kind,
+    code,
+    meta,
+    severity,
+    requiresUserAction,
+    dedupeKey,
+    createdAt: new Date().toISOString()
+  };
+}
+
+function normalizeErrorMessage(error) {
+  if (typeof error === 'string') {
+    return error;
+  }
+
+  if (error && typeof error.message === 'string') {
+    return error.message;
+  }
+
+  if (error == null) {
+    return 'Unknown error';
+  }
+
+  return String(error);
+}
+
+function normalizeSessionName(sessionName) {
+  if (typeof sessionName !== 'string') {
+    return null;
+  }
+
+  const normalized = sessionName.replace(/\s+/g, ' ').trim();
+  if (!normalized) {
+    return null;
+  }
+
+  return normalized.length > 80 ? `${normalized.slice(0, 77)}...` : normalized;
+}
+
+function rowMatchesProvider(row, provider) {
+  return row && (!provider || row.provider === provider);
+}
+
+function resolveSessionRow(sessionId, provider) {
+  if (!sessionId) {
+    return null;
+  }
+
+  const appSessionRow = sessionsDb.getSessionById(sessionId);
+  if (rowMatchesProvider(appSessionRow, provider)) {
+    return appSessionRow;
+  }
+
+  const providerSessionRow = sessionsDb.getSessionByProviderSessionId(sessionId);
+  if (rowMatchesProvider(providerSessionRow, provider)) {
+    return providerSessionRow;
+  }
+
+  return null;
+}
+
+function normalizeNotificationSession(event) {
+  if (!event?.sessionId || !event.provider || event.provider === 'system') {
+    return event;
+  }
+
+  const row = resolveSessionRow(event.sessionId, event.provider);
+  if (!row || row.session_id === event.sessionId) {
+    return event;
+  }
+
+  return {
+    ...event,
+    sessionId: row.session_id
+  };
+}
+
+function resolveSessionName(event) {
+  const explicitSessionName = normalizeSessionName(event.meta?.sessionName);
+  if (explicitSessionName) {
+    return explicitSessionName;
+  }
+
+  if (!event.sessionId || !event.provider) {
+    return null;
+  }
+
+  return normalizeSessionName(sessionsDb.getSessionName(event.sessionId, event.provider));
+}
+
+function buildNotificationPayload(event) {
+  const normalizedEvent = normalizeNotificationSession(event);
+  const CODE_MAP = {
+    'permission.required': normalizedEvent.meta?.toolName
+      ? `Action Required: Tool "${normalizedEvent.meta.toolName}" needs approval`
+      : 'Action Required: A tool needs your approval',
+    'run.stopped': normalizedEvent.meta?.stopReason || 'Run Stopped: The run has stopped',
+    'run.failed': normalizedEvent.meta?.error ? `Run Failed: ${normalizedEvent.meta.error}` : 'Run Failed: The run encountered an error',
+    'agent.notification': normalizedEvent.meta?.message ? String(normalizedEvent.meta.message) : 'You have a new notification',
+    'push.enabled': 'Push notifications are now enabled!'
+  };
+  const providerLabel = PROVIDER_LABELS[normalizedEvent.provider] || 'Assistant';
+  const sessionName = resolveSessionName(normalizedEvent);
+  const message = CODE_MAP[normalizedEvent.code] || 'You have a new notification';
+
+  return {
+    title: sessionName || 'CloudCLI',
+    body: `${providerLabel}: ${message}`,
+    data: {
+      sessionId: normalizedEvent.sessionId || null,
+      code: normalizedEvent.code,
+      provider: normalizedEvent.provider || null,
+      sessionName,
+      tag: `${normalizedEvent.provider || 'assistant'}:${normalizedEvent.sessionId || 'none'}:${normalizedEvent.code}`
+    }
+  };
+}
+
+function sendWebPushPayload(userId, payload) {
+  const subscriptions = pushSubscriptionsDb.getSubscriptions(userId);
+  if (!subscriptions.length) return Promise.resolve();
+
+  const serializedPayload = JSON.stringify(payload);
+  return Promise.allSettled(
+    subscriptions.map((sub) =>
+      webPush.sendNotification(
+        {
+          endpoint: sub.endpoint,
+          keys: {
+            p256dh: sub.keys_p256dh,
+            auth: sub.keys_auth
+          }
+        },
+        serializedPayload
+      )
+    )
+  ).then((results) => {
+    results.forEach((result, index) => {
+      if (result.status === 'rejected') {
+        const statusCode = result.reason?.statusCode;
+        if (statusCode === 410 || statusCode === 404) {
+          pushSubscriptionsDb.removeSubscription(subscriptions[index].endpoint);
+        }
+      }
+    });
+  });
+}
+
+const notificationChannels = [
+  {
+    id: 'webPush',
+    // TODO: Web push still uses push_subscriptions. Do not remove that table until
+    // browser push subscriptions are migrated into notification_channel_endpoints.
+    isEnabled: (preferences) => Boolean(preferences?.channels?.webPush),
+    send: ({ userId, payload }) => sendWebPushPayload(userId, payload)
+  },
+  {
+    id: 'desktop',
+    isEnabled: (preferences) => Boolean(preferences?.channels?.desktop),
+    send: ({ userId, payload }) => sendDesktopNotificationToClients(userId, payload)
+  }
+];
+
+function notifyUserIfEnabled({ userId, event }) {
+  if (!userId || !event) {
+    return;
+  }
+
+  const normalizedEvent = normalizeNotificationSession(event);
+  const preferences = notificationPreferencesDb.getPreferences(userId);
+  if (!isNotificationEventEnabled(preferences, normalizedEvent)) {
+    return;
+  }
+  if (isDuplicate(normalizedEvent)) {
+    return;
+  }
+
+  const payload = buildNotificationPayload(normalizedEvent);
+  for (const channel of notificationChannels) {
+    if (!channel.isEnabled(preferences)) {
+      continue;
+    }
+    Promise.resolve(channel.send({ userId, event: normalizedEvent, payload })).catch((err) => {
+      console.error(`Notification channel "${channel.id}" send error:`, err);
+    });
+  }
+}
+
+function notifyRunStopped({ userId, provider, sessionId = null, stopReason = 'completed', sessionName = null }) {
+  notifyUserIfEnabled({
+    userId,
+    event: createNotificationEvent({
+      provider,
+      sessionId,
+      kind: 'stop',
+      code: 'run.stopped',
+      meta: { stopReason, sessionName },
+      severity: 'info',
+      dedupeKey: `${provider}:run:stop:${sessionId || 'none'}:${stopReason}`
+    })
+  });
+}
+
+function notifyRunFailed({ userId, provider, sessionId = null, error, sessionName = null }) {
+  const errorMessage = normalizeErrorMessage(error);
+
+  notifyUserIfEnabled({
+    userId,
+    event: createNotificationEvent({
+      provider,
+      sessionId,
+      kind: 'error',
+      code: 'run.failed',
+      meta: { error: errorMessage, sessionName },
+      severity: 'error',
+      dedupeKey: `${provider}:run:error:${sessionId || 'none'}:${errorMessage}`
+    })
+  });
+}
+
+export {
+  buildNotificationPayload,
+  createNotificationEvent,
+  notifyUserIfEnabled,
+  notifyRunStopped,
+  notifyRunFailed
+};

server/modules/notifications/websocket/desktop-notifications-websocket.service.ts

@@ -0,0 +1,109 @@
+import type { WebSocket } from 'ws';
+
+import {
+  registerDesktopNotificationClient,
+  unregisterDesktopNotificationClient,
+} from '@/modules/notifications/services/desktop-notification-clients.service.js';
+import type { AuthenticatedWebSocketRequest } from '@/shared/types.js';
+import { parseIncomingJsonObject } from '@/shared/utils.js';
+
+type DesktopNotificationRegisterMessage = {
+  type?: unknown;
+  kind?: unknown;
+  deviceId?: unknown;
+  label?: unknown;
+  platform?: unknown;
+  appVersion?: unknown;
+};
+
+function readRequestUserId(request: AuthenticatedWebSocketRequest): number | null {
+  const user = request.user;
+  const rawUserId = typeof user?.id === 'number' || typeof user?.id === 'string'
+    ? user.id
+    : typeof user?.userId === 'number' || typeof user?.userId === 'string'
+      ? user.userId
+      : null;
+  const numericUserId = Number(rawUserId);
+  return Number.isInteger(numericUserId) && numericUserId > 0 ? numericUserId : null;
+}
+
+function readOptionalString(value: unknown): string | null {
+  if (typeof value !== 'string') return null;
+  const normalized = value.trim();
+  return normalized || null;
+}
+
+function sendJson(ws: WebSocket, payload: unknown): void {
+  if (ws.readyState === ws.OPEN) {
+    ws.send(JSON.stringify(payload));
+  }
+}
+
+export function handleDesktopNotificationsConnection(
+  ws: WebSocket,
+  request: AuthenticatedWebSocketRequest
+): void {
+  const userId = readRequestUserId(request);
+  if (!userId) {
+    ws.close(1008, 'Missing authenticated user');
+    return;
+  }
+
+  let registered = false;
+
+  ws.on('message', (rawMessage) => {
+    const data = parseIncomingJsonObject(rawMessage) as DesktopNotificationRegisterMessage | null;
+    if (!data) {
+      return;
+    }
+
+    const type = typeof data.type === 'string' ? data.type : typeof data.kind === 'string' ? data.kind : '';
+    if (type === 'notification_ack') {
+      return;
+    }
+
+    if (type !== 'register' || registered) {
+      return;
+    }
+
+    const deviceId = readOptionalString(data.deviceId);
+    if (!deviceId) {
+      sendJson(ws, {
+        type: 'error',
+        code: 'DEVICE_ID_REQUIRED',
+        message: 'Desktop notification registration requires deviceId.',
+      });
+      ws.close(1008, 'Missing deviceId');
+      return;
+    }
+
+    const device = registerDesktopNotificationClient({
+      userId,
+      deviceId,
+      label: readOptionalString(data.label),
+      platform: readOptionalString(data.platform),
+      appVersion: readOptionalString(data.appVersion),
+      ws,
+    });
+
+    if (!device) {
+      ws.close(1011, 'Registration failed');
+      return;
+    }
+
+    registered = true;
+    sendJson(ws, {
+      type: 'registered',
+      deviceId: device.endpoint_id,
+      enabled: Boolean(device.enabled),
+    });
+  });
+
+  ws.on('close', () => {
+    unregisterDesktopNotificationClient(ws);
+  });
+
+  ws.on('error', () => {
+    unregisterDesktopNotificationClient(ws);
+  });
+}

server/modules/providers/provider.routes.ts

@@ -430,6 +430,17 @@ router.post(
   }),
 );
 
+router.delete(
+  '/:provider/skills/:directoryName',
+  asyncHandler(async (req: Request, res: Response) => {
+    const provider = parseProvider(req.params.provider);
+    const result = await providerSkillsService.removeProviderSkill(provider, {
+      directoryName: readPathParam(req.params.directoryName, 'directoryName'),
+    });
+    res.json(createApiSuccessResponse(result));
+  }),
+);
+
 // ----------------- MCP routes -----------------
 router.get(
   '/:provider/mcp/servers',

server/modules/providers/services/skills.service.ts

@@ -3,6 +3,7 @@ import type {
   ProviderSkill,
   ProviderSkillCreateInput,
   ProviderSkillListOptions,
+  ProviderSkillRemoveInput,
 } from '@/shared/types.js';
 
 export const providerSkillsService = {
@@ -27,4 +28,12 @@ export const providerSkillsService = {
     const provider = providerRegistry.resolveProvider(providerName);
     return provider.skills.addSkills(input);
   },
+
+  async removeProviderSkill(
+    providerName: string,
+    input: ProviderSkillRemoveInput,
+  ): Promise<{ removed: boolean; provider: string; directoryName: string }> {
+    const provider = providerRegistry.resolveProvider(providerName);
+    return provider.skills.removeSkill(input);
+  },
 };

server/modules/providers/shared/skills/skills.provider.ts

@@ -1,10 +1,11 @@
 import path from 'node:path';
-import { mkdir, rm, writeFile } from 'node:fs/promises';
+import { mkdir, rm, stat, writeFile } from 'node:fs/promises';
 
 import type { IProviderSkills } from '@/shared/interfaces.js';
 import type {
   LLMProvider,
   ProviderSkillCreateInput,
+  ProviderSkillRemoveInput,
   ProviderSkill,
   ProviderSkillListOptions,
   ProviderSkillSource,
@@ -236,6 +237,48 @@ export abstract class SkillsProvider implements IProviderSkills {
     return pendingInstalls.map((install) => install.skill);
   }
 
+  async removeSkill(
+    input: ProviderSkillRemoveInput,
+  ): Promise<{ removed: boolean; provider: LLMProvider; directoryName: string }> {
+    const globalSkillSource = await this.getGlobalSkillSource();
+    if (!globalSkillSource) {
+      throw new AppError(`${this.provider} does not support managed global skills.`, {
+        code: 'PROVIDER_SKILLS_WRITE_UNSUPPORTED',
+        statusCode: 400,
+      });
+    }
+
+    const directoryName = normalizeSkillDirectoryName(input.directoryName);
+    if (!directoryName) {
+      throw new AppError('Skill directoryName is required.', {
+        code: 'PROVIDER_SKILL_DIRECTORY_REQUIRED',
+        statusCode: 400,
+      });
+    }
+
+    const skillDirectoryPath = path.join(globalSkillSource.rootDir, directoryName);
+    const resolvedRoot = path.resolve(globalSkillSource.rootDir);
+    const resolvedSkillDirectoryPath = path.resolve(skillDirectoryPath);
+    if (
+      resolvedSkillDirectoryPath !== resolvedRoot
+      && !resolvedSkillDirectoryPath.startsWith(`${resolvedRoot}${path.sep}`)
+    ) {
+      throw new AppError('Skill directory must stay inside the managed skill root.', {
+        code: 'PROVIDER_SKILL_DIRECTORY_INVALID',
+        statusCode: 400,
+      });
+    }
+
+    const removed = await stat(resolvedSkillDirectoryPath)
+      .then((stats) => stats.isDirectory())
+      .catch(() => false);
+    if (removed) {
+      await rm(resolvedSkillDirectoryPath, { recursive: true, force: true });
+    }
+
+    return { removed, provider: this.provider, directoryName };
+  }
+
   protected abstract getSkillSources(workspacePath: string): Promise<ProviderSkillSource[]>;
 
   protected async getGlobalSkillSource(): Promise<ProviderSkillSource | null> {

server/modules/providers/tests/skills.test.ts

@@ -662,6 +662,19 @@ test('providerSkillsService adds global skills for claude, codex, gemini, and cu
     const listedCursorSkills = await providerSkillsService.listProviderSkills('cursor');
     assert.equal(listedCursorSkills.some((skill) => skill.name === 'cursor-global'), true);
 
+    const removedCodexSkill = await providerSkillsService.removeProviderSkill('codex', {
+      directoryName: 'uploaded-codex-folder',
+    });
+    assert.equal(removedCodexSkill.removed, true);
+    assert.equal(removedCodexSkill.provider, 'codex');
+    assert.equal(removedCodexSkill.directoryName, 'uploaded-codex-folder');
+    await assert.rejects(fs.stat(path.dirname(createdCodexSkill.sourcePath)), { code: 'ENOENT' });
+
+    const removedMissingSkill = await providerSkillsService.removeProviderSkill('codex', {
+      directoryName: 'uploaded-codex-folder',
+    });
+    assert.equal(removedMissingSkill.removed, false);
+
     await assert.rejects(
       providerSkillsService.addProviderSkills('codex', {
         entries: [
@@ -701,4 +714,11 @@ test('providerSkillsService rejects managed skill creation for opencode', { conc
     }),
     /does not support managed global skills/i,
   );
+
+  await assert.rejects(
+    providerSkillsService.removeProviderSkill('opencode', {
+      directoryName: 'opencode-global-dir',
+    }),
+    /does not support managed global skills/i,
+  );
 });

server/modules/websocket/services/websocket-server.service.ts

@@ -7,6 +7,7 @@ import { verifyWebSocketClient } from '@/modules/websocket/services/websocket-au
 import { handlePluginWsProxy } from '@/modules/websocket/services/plugin-websocket-proxy.service.js';
 import { handleShellConnection } from '@/modules/websocket/services/shell-websocket.service.js';
 import { handleDesktopAgentConnection } from '@/modules/websocket/services/desktop-agent-websocket.service.js';
+import { handleDesktopNotificationsConnection } from '@/modules/notifications/index.js';
 import type { AuthenticatedWebSocketRequest } from '@/shared/types.js';
 
 type WebSocketServerDependencies = {
@@ -69,6 +70,11 @@ export function createWebSocketServer(
       return;
     }
 
+    if (pathname === '/desktop-notifications') {
+      handleDesktopNotificationsConnection(ws, incomingRequest);
+      return;
+    }
+
     if (pathname.startsWith('/plugin-ws/')) {
       handlePluginWsProxy(ws, pathname, dependencies.getPluginPort);
       return;