diff --git a/services/platform-service/src/modules/ab-testing/repository.ts b/services/platform-service/src/modules/ab-testing/repository.ts
index 5d2a0f6d..72633f72 100644
--- a/services/platform-service/src/modules/ab-testing/repository.ts
+++ b/services/platform-service/src/modules/ab-testing/repository.ts
@@ -14,9 +14,10 @@ import type {
   ExperimentSuggestion,
   CreateExperimentInput,
   UpdateExperimentInput,
+  TargetingConfig,
 } from './types.js';
 import { assignVariant, assignByStrategy, isInExperimentBucket, type StrategyContext } from './bucketing.js';
-import type { TargetingContext, TargetingConfig } from './targeting.js';
+import type { TargetingContext } from './targeting.js';
 import { matchesTargeting } from './targeting.js';
 
 // ─────────────────────────────────────────────────────────────────────────────
diff --git a/services/platform-service/src/modules/diagnostics/performance-profile-repository.ts b/services/platform-service/src/modules/diagnostics/performance-profile-repository.ts
new file mode 100644
index 00000000..f0bd816f
--- /dev/null
+++ b/services/platform-service/src/modules/diagnostics/performance-profile-repository.ts
@@ -0,0 +1,127 @@
+/**
+ * Performance Profile Repository — Remote Diagnostics
+ * Ingest and query performance profiling data.
+ */
+
+import { getCollection } from '../../lib/datastore.js';
+import type {
+  PerformanceProfileDoc,
+  ProfileData,
+  QueryProfilesInput,
+} from './performance-profile-types.js';
+
+const PROFILES_CONTAINER = 'performance_profiles';
+
+function profilesCollection() {
+  return getCollection<PerformanceProfileDoc>(PROFILES_CONTAINER, '/pk');
+}
+
+/**
+ * Ingest a performance profile.
+ */
+export async function ingestProfile(
+  doc: PerformanceProfileDoc
+): Promise<{ id: string }> {
+  const collection = profilesCollection();
+  await collection.upsert(doc);
+  return { id: doc.id };
+}
+
+/**
+ * Get a performance profile by ID.
+ */
+export async function getProfile(
+  productId: string,
+  sessionId: string,
+  profileId: string
+): Promise<PerformanceProfileDoc | null> {
+  const collection = profilesCollection();
+  const pk = `${productId}:${sessionId}`;
+
+  const results = await collection.findMany({
+    filter: { pk, profileId },
+    limit: 1,
+  });
+
+  return results[0] ?? null;
+}
+
+/**
+ * Query performance profiles for a session.
+ */
+export async function queryProfiles(
+  productId: string,
+  sessionId: string,
+  query: QueryProfilesInput
+): Promise<{
+  profiles: PerformanceProfileDoc[];
+  total: number;
+}> {
+  const collection = profilesCollection();
+  const pk = `${productId}:${sessionId}`;
+
+  // Build filter
+  const filter: Record<string, unknown> = { pk };
+  if (query.profileType) {
+    filter.profileType = query.profileType;
+  }
+  if (query.platform) {
+    filter.platform = query.platform;
+  }
+
+  const results = await collection.findMany({
+    filter,
+    limit: query.limit,
+  });
+
+  return {
+    profiles: results,
+    total: results.length,
+  };
+}
+
+/**
+ * List all profiles for a product (admin query).
+ */
+export async function listProfilesForProduct(
+  productId: string,
+  limit: number = 50
+): Promise<PerformanceProfileDoc[]> {
+  const collection = profilesCollection();
+
+  // Query by productId field (not pk prefix)
+  const results = await collection.findMany({
+    filter: { productId },
+    limit,
+  });
+
+  return results;
+}
+
+/**
+ * Delete a performance profile.
+ */
+export async function deleteProfile(
+  productId: string,
+  sessionId: string,
+  profileId: string
+): Promise<boolean> {
+  const collection = profilesCollection();
+  const pk = `${productId}:${sessionId}`;
+
+  const results = await collection.findMany({
+    filter: { pk, profileId },
+    limit: 1,
+  });
+
+  if (results.length === 0) return false;
+
+  // Soft delete
+  await collection.upsert({
+    ...results[0],
+    profile: { type: results[0].profile.type, platform: results[0].platform } as ProfileData,
+    updatedAt: new Date().toISOString(),
+  });
+
+  return true;
+}
diff --git a/services/platform-service/src/modules/diagnostics/performance-profile-routes.ts b/services/platform-service/src/modules/diagnostics/performance-profile-routes.ts
new file mode 100644
index 00000000..61301d2d
--- /dev/null
+++ b/services/platform-service/src/modules/diagnostics/performance-profile-routes.ts
@@ -0,0 +1,150 @@
+/**
+ * Performance Profile Routes — Remote Diagnostics
+ * Ingest and query performance profiling data.
+ */
+
+import type { FastifyInstance } from 'fastify';
+import { randomUUID } from 'node:crypto';
+import { requireRole } from '../../lib/auth.js';
+import { IngestProfileSchema, QueryProfilesSchema } from './performance-profile-types.js';
+import {
+  ingestProfile,
+  getProfile,
+  queryProfiles,
+  listProfilesForProduct,
+} from './performance-profile-repository.js';
+import { getRequestProductId } from '../../lib/request-context.js';
+import { NotFoundError, BadRequestError } from '../../lib/errors.js';
+import type { PerformanceProfileDoc } from './performance-profile-types.js';
+
+export async function performanceProfileRoutes(app: FastifyInstance): Promise<void> {
+  // Ingest performance profile (client endpoint)
+  app.post('/diagnostics/sessions/:id/profiles', async (req, reply) => {
+    const { id: sessionId } = req.params as { id: string };
+    const productId = getRequestProductId(req);
+
+    // Require authentication
+    if (!req.jwtPayload?.sub) {
+      return reply.status(401).send({ error: 'Authentication required' });
+    }
+
+    // Validate request body
+    const result = IngestProfileSchema.safeParse(req.body);
+    if (!result.success) {
+      return reply.status(400).send({
+        error: 'Invalid profile data',
+        details: result.error.issues,
+      });
+    }
+
+    const { profileType, platform, deviceInfo, profile } = result.data;
+
+    // Validate session ID matches
+    if (result.data.sessionId !== sessionId) {
+      throw new BadRequestError('Session ID mismatch');
+    }
+
+    // Create profile document
+    const now = new Date().toISOString();
+    const profileId = `prof_${randomUUID().replace(/-/g, '')}`;
+
+    const doc: PerformanceProfileDoc = {
+      id: `pp_${randomUUID().replace(/-/g, '')}`,
+      pk: `${productId}:${sessionId}`,
+      sessionId,
+      productId,
+      profileId,
+      profileType,
+      platform,
+      deviceInfo,
+      profile: profile as unknown as PerformanceProfileDoc['profile'],
+      startedAt: now,
+      endedAt: now,
+      createdAt: now,
+      ttl: 7 * 86400, // 7 days
+    };
+
+    const { id } = await ingestProfile(doc);
+
+    app.log.info(`Ingested ${profileType} profile ${profileId} for session ${sessionId}`);
+
+    reply.status(201);
+    return {
+      id,
+      profileId,
+      sessionId,
+      profileType,
+    };
+  });
+
+  // Get specific profile (admin only)
+  app.get('/diagnostics/sessions/:id/profiles/:profileId', async (req, reply) => {
+    await requireRole(req, 'admin');
+
+    const { id: sessionId, profileId } = req.params as { id: string; profileId: string };
+    const productId = getRequestProductId(req);
+
+    const profile = await getProfile(productId, sessionId, profileId);
+    if (!profile) {
+      throw new NotFoundError('Performance profile not found');
+    }
+
+    return {
+      id: profile.id,
+      profileId: profile.profileId,
+      profileType: profile.profileType,
+      platform: profile.platform,
+      deviceInfo: profile.deviceInfo,
+      profile: profile.profile,
+      startedAt: profile.startedAt,
+      endedAt: profile.endedAt,
+    };
+  });
+
+  // Query profiles for a session (admin only)
+  app.get('/diagnostics/sessions/:id/profiles', async (req, reply) => {
+    await requireRole(req, 'admin');
+
+    const { id: sessionId } = req.params as { id: string };
+    const productId = getRequestProductId(req);
+    const query = QueryProfilesSchema.parse(req.query);
+
+    const result = await queryProfiles(productId, sessionId, query);
+
+    return {
+      profiles: result.profiles.map(p => ({
+        id: p.id,
+        profileId: p.profileId,
+        profileType: p.profileType,
+        platform: p.platform,
+        deviceInfo: p.deviceInfo,
+        startedAt: p.startedAt,
+        endedAt: p.endedAt,
+      })),
+      total: result.total,
+    };
+  });
+
+  // List all profiles for product (admin only)
+  app.get('/diagnostics/profiles', async (req, reply) => {
+    await requireRole(req, 'admin');
+
+    const productId = getRequestProductId(req);
+    const query = req.query as { limit?: string };
+    const limit = Math.min(parseInt(query?.limit || '50', 10), 100);
+
+    const profiles = await listProfilesForProduct(productId, limit);
+
+    return {
+      profiles: profiles.map(p => ({
+        id: p.id,
+        profileId: p.profileId,
+        sessionId: p.sessionId,
+        profileType: p.profileType,
+        platform: p.platform,
+        deviceInfo: p.deviceInfo,
+        startedAt: p.startedAt,
+      })),
+    };
+  });
+}
diff --git a/services/platform-service/src/modules/diagnostics/performance-profile-types.ts b/services/platform-service/src/modules/diagnostics/performance-profile-types.ts
index c5da6a77..ff187303 100644
--- a/services/platform-service/src/modules/diagnostics/performance-profile-types.ts
+++ b/services/platform-service/src/modules/diagnostics/performance-profile-types.ts
@@ -173,6 +173,7 @@ export interface PerformanceProfileDoc {
   startedAt: string;
   endedAt: string;
   createdAt: string;
+  updatedAt?: string;
 
   // TTL
   ttl: number;
diff --git a/services/platform-service/src/modules/diagnostics/session-replay-repository.ts b/services/platform-service/src/modules/diagnostics/session-replay-repository.ts
index a007c1fa..831e9a86 100644
--- a/services/platform-service/src/modules/diagnostics/session-replay-repository.ts
+++ b/services/platform-service/src/modules/diagnostics/session-replay-repository.ts
@@ -65,6 +65,7 @@ export async function ingestReplayEvents(
       durationMs: lastEvent?.timestamp || 0,
       privacyConfig,
       createdAt: now,
+      updatedAt: now,
       ttl: 7 * 86400, // 7 days
     };
 
diff --git a/services/platform-service/src/modules/diagnostics/session-replay-routes.ts b/services/platform-service/src/modules/diagnostics/session-replay-routes.ts
new file mode 100644
index 00000000..522f15e2
--- /dev/null
+++ b/services/platform-service/src/modules/diagnostics/session-replay-routes.ts
@@ -0,0 +1,98 @@
+/**
+ * Session Replay Routes — Remote Diagnostics
+ * Ingest and query session replay events.
+ */
+
+import type { FastifyInstance } from 'fastify';
+import { requireRole } from '../../lib/auth.js';
+import { IngestReplayEventsSchema, QueryReplaySchema } from './session-replay-types.js';
+import {
+  ingestReplayEvents,
+  getSessionReplay,
+  queryReplayEvents,
+} from './session-replay-repository.js';
+import { getRequestProductId } from '../../lib/request-context.js';
+import { NotFoundError, BadRequestError } from '../../lib/errors.js';
+
+export async function sessionReplayRoutes(app: FastifyInstance): Promise<void> {
+  // Ingest replay events (client endpoint)
+  app.post('/diagnostics/sessions/:id/replay', async (req, reply) => {
+    const { id: sessionId } = req.params as { id: string };
+    const productId = getRequestProductId(req);
+    const deviceId = req.headers['x-device-id'] as string | undefined;
+
+    // Require authentication
+    if (!req.jwtPayload?.sub) {
+      return reply.status(401).send({ error: 'Authentication required' });
+    }
+
+    // Validate request body
+    const result = IngestReplayEventsSchema.safeParse(req.body);
+    if (!result.success) {
+      return reply.status(400).send({
+        error: 'Invalid replay events',
+        details: result.error.issues,
+      });
+    }
+
+    const { events, privacyConfig } = result.data;
+
+    // Validate session ID matches
+    if (result.data.sessionId !== sessionId) {
+      throw new BadRequestError('Session ID mismatch');
+    }
+
+    // Ingest events
+    const ingestResult = await ingestReplayEvents(
+      productId,
+      sessionId,
+      events,
+      privacyConfig
+    );
+
+    app.log.info(`Ingested ${ingestResult.accepted} replay events for session ${sessionId}`);
+
+    return {
+      accepted: ingestResult.accepted,
+      sessionId,
+    };
+  });
+
+  // Get full session replay (admin only)
+  app.get('/diagnostics/sessions/:id/replay', async (req, reply) => {
+    await requireRole(req, 'admin');
+
+    const { id: sessionId } = req.params as { id: string };
+    const productId = getRequestProductId(req);
+
+    const replay = await getSessionReplay(productId, sessionId);
+    if (!replay) {
+      throw new NotFoundError('Session replay not found');
+    }
+
+    return {
+      sessionId: replay.sessionId,
+      eventCount: replay.eventCount,
+      durationMs: replay.durationMs,
+      events: replay.events,
+      privacyConfig: replay.privacyConfig,
+    };
+  });
+
+  // Query replay events with pagination (admin only)
+  app.get('/diagnostics/sessions/:id/replay/events', async (req, reply) => {
+    await requireRole(req, 'admin');
+
+    const { id: sessionId } = req.params as { id: string };
+    const productId = getRequestProductId(req);
+    const query = QueryReplaySchema.parse(req.query);
+
+    const result = await queryReplayEvents(productId, sessionId, query);
+
+    return {
+      events: result.events,
+      totalEvents: result.totalEvents,
+      continuationToken: result.continuationToken,
+    };
+  });
+}
diff --git a/services/platform-service/src/modules/diagnostics/session-replay-types.ts b/services/platform-service/src/modules/diagnostics/session-replay-types.ts
index ecc87462..c97f8597 100644
--- a/services/platform-service/src/modules/diagnostics/session-replay-types.ts
+++ b/services/platform-service/src/modules/diagnostics/session-replay-types.ts
@@ -30,7 +30,6 @@ export type ReplayEventType = z.infer<typeof ReplayEventTypeEnum>;
 export interface ReplayEvent {
   id: string;
   sessionId: string;
-  productId: string;
   timestamp: number; // milliseconds since session start
   type: ReplayEventType;
   data: Record<string, unknown>;
@@ -133,6 +132,7 @@ export interface SessionReplayDoc {
 
   // Storage
   createdAt: string;
+  updatedAt: string;
   ttl: number; // Auto-expiry (default 7 days)
 }
 
diff --git a/services/platform-service/src/modules/diagnostics/trigger-job.ts b/services/platform-service/src/modules/diagnostics/trigger-job.ts
new file mode 100644
index 00000000..2036c529
--- /dev/null
+++ b/services/platform-service/src/modules/diagnostics/trigger-job.ts
@@ -0,0 +1,148 @@
+/**
+ * Diagnostic Trigger Job — Background job for auto-trigger evaluation
+ * Runs every 5 minutes to check trigger conditions and auto-start sessions.
+ */
+
+import { setInterval } from 'node:timers';
+import { runAllTriggers } from './auto-triggers.js';
+import { getRegisteredContainer } from '@bytelyst/cosmos';
+import type { TriggerConfig } from './auto-triggers.js';
+
+const TRIGGER_CONTAINER = 'diagnostic_triggers';
+const EVALUATION_INTERVAL_MS = 5 * 60 * 1000; // 5 minutes
+
+let jobInterval: ReturnType<typeof setInterval> | null = null;
+
+/**
+ * Get all unique product IDs that have triggers configured.
+ */
+async function getProductsWithTriggers(): Promise<string[]> {
+  const container = await getRegisteredContainer(TRIGGER_CONTAINER);
+
+  // Query all triggers and extract unique product IDs
+  const query = {
+    query: 'SELECT DISTINCT c.productId FROM c WHERE c.enabled = true',
+  };
+
+  const { resources } = await container.items.query<{ productId: string }>(query).fetchAll();
+  return resources.map(r => r.productId);
+}
+
+/**
+ * Evaluate a single trigger by ID.
+ * Used for testing or manual re-evaluation.
+ */
+export async function evaluateSingleTrigger(
+  triggerId: string,
+  adminUserId: string
+): Promise<{ triggered: boolean; reason?: string; sessionId?: string }> {
+  const container = await getRegisteredContainer(TRIGGER_CONTAINER);
+
+  try {
+    const { resource } = await container.item(triggerId, triggerId).read<TriggerConfig>();
+    if (!resource) {
+      return { triggered: false, reason: 'Trigger not found' };
+    }
+
+    if (!resource.enabled) {
+      return { triggered: false, reason: 'Trigger disabled' };
+    }
+
+    const { evaluateTrigger } = await import('./auto-triggers.js');
+    const result = await evaluateTrigger(resource, adminUserId);
+
+    return {
+      triggered: result.triggered,
+      reason: result.reason,
+      sessionId: result.session?.id,
+    };
+  } catch (err) {
+    const msg = err instanceof Error ? err.message : String(err);
+    return { triggered: false, reason: `Error: ${msg}` };
+  }
+}
+
+/**
+ * Run trigger evaluation for all products.
+ * Called by the scheduled job.
+ */
+async function runTriggerEvaluation(log?: { info: (msg: string) => void }): Promise<void> {
+  const logger = log || console;
+
+  try {
+    logger.info('[diagnostic-trigger-job] Starting trigger evaluation');
+
+    const productIds = await getProductsWithTriggers();
+    logger.info(`[diagnostic-trigger-job] Found ${productIds.length} products with enabled triggers`);
+
+    let totalEvaluated = 0;
+    let totalTriggered = 0;
+
+    for (const productId of productIds) {
+      try {
+        // Use system user for auto-triggered evaluations
+        const results = await runAllTriggers(productId, 'system');
+        totalEvaluated += results.length;
+        totalTriggered += results.filter(r => r.triggered).length;
+
+        const triggeredCount = results.filter(r => r.triggered).length;
+        if (triggeredCount > 0) {
+          logger.info(`[diagnostic-trigger-job] Product ${productId}: ${triggeredCount}/${results.length} triggers fired`);
+        }
+      } catch (err) {
+        const msg = err instanceof Error ? err.message : String(err);
+        logger.info(`[diagnostic-trigger-job] Error evaluating triggers for ${productId}: ${msg}`);
+      }
+    }
+
+    logger.info(`[diagnostic-trigger-job] Evaluation complete: ${totalTriggered}/${totalEvaluated} triggers fired`);
+  } catch (err) {
+    const msg = err instanceof Error ? err.message : String(err);
+    logger.info(`[diagnostic-trigger-job] Fatal error: ${msg}`);
+  }
+}
+
+/**
+ * Start the background trigger evaluation job.
+ * Called once at server startup.
+ */
+export function startTriggerEvaluationJob(log?: { info: (msg: string) => void }): void {
+  if (jobInterval) {
+    return; // Already running
+  }
+
+  const logger = log || console;
+  logger.info('[diagnostic-trigger-job] Starting evaluation job (5 minute interval)');
+
+  // Run immediately on startup
+  runTriggerEvaluation(log).catch(() => {});
+
+  // Schedule recurring runs
+  jobInterval = setInterval(() => {
+    runTriggerEvaluation(log).catch(() => {});
+  }, EVALUATION_INTERVAL_MS);
+}
+
+/**
+ * Stop the background trigger evaluation job.
+ * Used for graceful shutdown.
+ */
+export function stopTriggerEvaluationJob(): void {
+  if (jobInterval) {
+    clearInterval(jobInterval);
+    jobInterval = null;
+  }
+}
+
+/**
+ * Get current job status.
+ */
+export function getTriggerJobStatus(): {
+  running: boolean;
+  intervalMinutes: number;
+} {
+  return {
+    running: jobInterval !== null,
+    intervalMinutes: EVALUATION_INTERVAL_MS / 60000,
+  };
+}
diff --git a/services/platform-service/src/modules/predictive-analytics/health-scoring.ts b/services/platform-service/src/modules/predictive-analytics/health-scoring.ts
index 5ce346be..fb5597a5 100644
--- a/services/platform-service/src/modules/predictive-analytics/health-scoring.ts
+++ b/services/platform-service/src/modules/predictive-analytics/health-scoring.ts
@@ -224,7 +224,7 @@ export class HealthScoringEngine {
     const metrics = {
       avgSessionLength: input.avgSessionLength,
       sessionsPerUser: input.sessionsPerUser,
-      featureAdoption: input.featureAdoption,
+      featureAdoptionAvg: featureAdoptionAvg,
     };
 
     const sessionLengthScore = this.normalizeLinear(input.avgSessionLength, 600) * 100;
@@ -409,10 +409,10 @@ export class HealthScoringEngine {
     const currentScore = this.calculateOverallScore(dimensions);
 
     // Simple trend-based forecasting (in production, use Prophet/ARIMA)
-    const trends = Object.values(dimensions).map((d) =>
+    const trends: number[] = Object.values(dimensions).map((d) =>
       d.trend === 'improving' ? 1 : d.trend === 'declining' ? -1 : 0
     );
-    const avgTrend = trends.reduce((a, b) => a + b, 0) / trends.length;
+    const avgTrend = trends.reduce((a: number, b: number) => a + b, 0) / trends.length;
 
     // 7-day forecast
     const trend7Days = avgTrend * 2; // Small movement
diff --git a/services/platform-service/src/modules/predictive-analytics/repository.ts b/services/platform-service/src/modules/predictive-analytics/repository.ts
index 0795842f..1b973ca3 100644
--- a/services/platform-service/src/modules/predictive-analytics/repository.ts
+++ b/services/platform-service/src/modules/predictive-analytics/repository.ts
@@ -43,7 +43,7 @@ export class PredictiveAnalyticsRepository {
   ): Promise<UserChurnPredictionDoc[]> {
     const container = getRegisteredContainer('churn_predictions');
     let queryStr = 'SELECT * FROM c WHERE c.productId = @productId';
-    const parameters: Array<{ name: string; value: unknown }> = [
+    const parameters: Array<{ name: string; value: string | number }> = [
       { name: '@productId', value: productId },
     ];
 
@@ -137,7 +137,7 @@ export class PredictiveAnalyticsRepository {
   async listCampaigns(productId?: string, status?: string): Promise<RetentionCampaignDoc[]> {
     const container = getRegisteredContainer('retention_campaigns');
     let queryStr = 'SELECT * FROM c WHERE 1=1';
-    const parameters: Array<{ name: string; value: unknown }> = [];
+    const parameters: Array<{ name: string; value: string }> = [];
 
     if (productId) {
       queryStr += ' AND c.productId = @productId';
diff --git a/services/platform-service/src/server.ts b/services/platform-service/src/server.ts
index d9693a3e..96f5e52e 100644
--- a/services/platform-service/src/server.ts
+++ b/services/platform-service/src/server.ts
@@ -50,6 +50,9 @@ import { telemetryRoutes } from './modules/telemetry/routes.js';
 import { diagnosticsRoutes } from './modules/diagnostics/routes.js';
 import { autoTriggerRoutes } from './modules/diagnostics/auto-trigger-routes.js';
 import { crashTriggerRoutes } from './modules/diagnostics/crash-trigger.js';
+import { sessionReplayRoutes } from './modules/diagnostics/session-replay-routes.js';
+import { performanceProfileRoutes } from './modules/diagnostics/performance-profile-routes.js';
+import { startTriggerEvaluationJob } from './modules/diagnostics/trigger-job.js';
 import { broadcastRoutes } from './modules/broadcasts/routes.js';
 import { surveyRoutes } from './modules/surveys/routes.js';
 import { jobRoutes } from './modules/jobs/routes.js';
@@ -156,6 +159,10 @@ await app.register(diagnosticsRoutes, { prefix: '/api' });
 await app.register(autoTriggerRoutes, { prefix: '/api' });
 // Crash-trigger routes for crash-triggered auto-sessions (Phase 4)
 await app.register(crashTriggerRoutes, { prefix: '/api' });
+// Session replay routes (Phase 4)
+await app.register(sessionReplayRoutes, { prefix: '/api' });
+// Performance profiling routes (Phase 4)
+await app.register(performanceProfileRoutes, { prefix: '/api' });
 // Public routes — no auth, registered at top level
 await app.register(publicRoutes, { prefix: '/api' });
 // Scheduled jobs module (admin: list, trigger, view runs)
@@ -192,4 +199,7 @@ await app.register(surveyRoutes, { prefix: '/api' });
 // Register event bus subscribers
 registerDiagnosticsSubscribers(app.log);
 
+// Start diagnostic trigger evaluation job (Phase 4)
+startTriggerEvaluationJob(app.log);
+
 await startService(app, { port: config.PORT, host: config.HOST });