diff --git a/services/platform-service/src/lib/cosmos-init.ts b/services/platform-service/src/lib/cosmos-init.ts
index e0377319..2c481e27 100644
--- a/services/platform-service/src/lib/cosmos-init.ts
+++ b/services/platform-service/src/lib/cosmos-init.ts
@@ -63,6 +63,7 @@ const CONTAINER_DEFS: Record<string, ContainerConfig> = {
   marketplace_installs: { partitionKeyPath: '/userId' },
   marketplace_certifications: { partitionKeyPath: '/listingId' },
   marketplace_reports: { partitionKeyPath: '/listingId' },
+  marketplace_votes: { partitionKeyPath: '/listingId' },
   // P2 — Product Intelligence
   experiments: { partitionKeyPath: '/id' },
   experiment_assignments: { partitionKeyPath: '/experimentId' },
diff --git a/services/platform-service/src/modules/marketplace/repository.ts b/services/platform-service/src/modules/marketplace/repository.ts
index 9034b764..4620ecfc 100644
--- a/services/platform-service/src/modules/marketplace/repository.ts
+++ b/services/platform-service/src/modules/marketplace/repository.ts
@@ -11,10 +11,12 @@ import type {
   MarketplaceInstallDoc,
   MarketplaceCertificationDoc,
   MarketplaceReportDoc,
+  MarketplaceVoteDoc,
   ListListingsQuery,
   ListReviewsQuery,
   ListInstallsQuery,
   ListReportsQuery,
+  ListMyReportsQuery,
 } from './types.js';
 
 // ─────────────────────────────────────────────────────────────────────────────
@@ -378,13 +380,46 @@ export async function updateReport(
   }
 }
 
-export async function listMyReports(reporterId: string): Promise<MarketplaceReportDoc[]> {
+export async function listMyReports(reporterId: string, query?: ListMyReportsQuery): Promise<MarketplaceReportDoc[]> {
+  const filter: FilterMap = { reporterId };
+  if (query?.productId) filter.productId = query.productId;
+
   return reportsCollection().findMany({
-    filter: { reporterId },
+    filter,
     sort: { createdAt: -1 },
   });
 }
 
+// ─────────────────────────────────────────────────────────────────────────────
+// Votes (to prevent duplicate voting)
+// ─────────────────────────────────────────────────────────────────────────────
+
+function votesCollection() {
+  return getCollection<MarketplaceVoteDoc>('marketplace_votes', '/id');
+}
+
+export async function getVoteByUserAndListing(
+  userId: string,
+  listingId: string
+): Promise<MarketplaceVoteDoc | null> {
+  return votesCollection().findOne({
+    filter: { userId, listingId },
+  });
+}
+
+export async function createVote(doc: MarketplaceVoteDoc): Promise<MarketplaceVoteDoc> {
+  return votesCollection().create(doc);
+}
+
+export async function deleteVote(id: string): Promise<boolean> {
+  try {
+    await votesCollection().delete(id, id);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
 // ─────────────────────────────────────────────────────────────────────────────
 // Aggregate Stats
 // ─────────────────────────────────────────────────────────────────────────────
diff --git a/services/platform-service/src/modules/marketplace/routes.ts b/services/platform-service/src/modules/marketplace/routes.ts
index 0cf6cdc2..61e9be22 100644
--- a/services/platform-service/src/modules/marketplace/routes.ts
+++ b/services/platform-service/src/modules/marketplace/routes.ts
@@ -30,6 +30,7 @@ import {
   type MarketplaceInstallDoc,
   type MarketplaceCertificationDoc,
   type MarketplaceReportDoc,
+  type MarketplaceVoteDoc,
 } from './types.js';
 
 // ─────────────────────────────────────────────────────────────────────────────
@@ -435,9 +436,9 @@ async function consumerRoutes(app: FastifyInstance) {
     return { success: true };
   });
 
-  // Vote on listing (toggle upvote)
+  // Vote on listing (toggle upvote) - prevents duplicate votes
   app.post('/marketplace/listings/:id/vote', async req => {
-    requireAuth(req);
+    const userId = requireAuth(req);
     const { id } = req.params as { id: string };
 
     const listing = await repo.getListingById(id);
@@ -446,8 +447,28 @@ async function consumerRoutes(app: FastifyInstance) {
       throw new NotFoundError('Listing not found');
     }
 
-    // Simple vote tracking using a cookie-like approach with listing metadata
-    // In production, you'd have a separate votes collection
+    // Check if user already voted
+    const existingVote = await repo.getVoteByUserAndListing(userId, id);
+    if (existingVote) {
+      // Toggle off: remove vote and decrement count
+      await repo.deleteVote(existingVote.id);
+      const newVoteCount = Math.max(0, listing.voteCount - 1);
+      await repo.updateListingStats(id, { voteCount: newVoteCount });
+      return { voted: false, voteCount: newVoteCount };
+    }
+
+    // Create new vote
+    const now = new Date().toISOString();
+    const voteDoc: MarketplaceVoteDoc = {
+      id: generateId('vote'),
+      listingId: id,
+      productId: listing.productId,
+      userId: userId,
+      createdAt: now,
+    };
+    await repo.createVote(voteDoc);
+
+    // Increment vote count
     const newVoteCount = listing.voteCount + 1;
     await repo.updateListingStats(id, { voteCount: newVoteCount });
 
@@ -751,7 +772,8 @@ async function reportRoutes(app: FastifyInstance) {
   // List my submitted reports
   app.get('/marketplace/reports/mine', async req => {
     const userId = requireAuth(req);
-    const reports = await repo.listMyReports(userId);
+    const pid = getRequestProductId(req);
+    const reports = await repo.listMyReports(userId, { productId: pid });
     return { reports };
   });
 }
diff --git a/services/platform-service/src/modules/marketplace/types.ts b/services/platform-service/src/modules/marketplace/types.ts
index 9d383573..41d11a2a 100644
--- a/services/platform-service/src/modules/marketplace/types.ts
+++ b/services/platform-service/src/modules/marketplace/types.ts
@@ -290,3 +290,19 @@ export const ListReportsQuerySchema = z.object({
 export type CreateReportInput = z.infer<typeof CreateReportSchema>;
 export type ResolveReportInput = z.infer<typeof ResolveReportSchema>;
 export type ListReportsQuery = z.infer<typeof ListReportsQuerySchema>;
+
+// ─────────────────────────────────────────────────────────────────────────────
+// Vote Types (to prevent duplicate voting)
+// ─────────────────────────────────────────────────────────────────────────────
+
+export interface MarketplaceVoteDoc {
+  id: string; // vote_<uuid>
+  listingId: string;
+  productId: string;
+  userId: string;
+  createdAt: string;
+}
+
+export type ListMyReportsQuery = {
+  productId?: string;
+};
diff --git a/services/platform-service/src/modules/referrals/migration-repository.ts b/services/platform-service/src/modules/referrals/migration-repository.ts
index 102a880d..f7ae0c9b 100644
--- a/services/platform-service/src/modules/referrals/migration-repository.ts
+++ b/services/platform-service/src/modules/referrals/migration-repository.ts
@@ -52,9 +52,9 @@ async function dualWrite<T>(
   if (mode === 'dual-write' && oldFn) {
     try {
       await oldFn(oldCollection());
-    } catch (err) {
+    } catch (err: unknown) {
       // Log but don't fail — new container is source of truth
-      console.warn('[referrals-migration] Old container write failed:', err);
+      process.stderr.write(`[referrals-migration] Old container write failed: ${err}\n`);
     }
   }
 
@@ -112,7 +112,7 @@ async function listWithMerge<T extends { id: string }>(
   const [newResults, oldResults] = await Promise.all([
     fn(newCollection()),
     oldFn(oldCollection()).catch((err) => {
-      console.warn('[referrals-migration] Old container read failed:', err);
+      process.stderr.write(`[referrals-migration] Old container read failed: ${err}\n`);
       return [] as T[];
     }),
   ]);
@@ -252,8 +252,8 @@ export async function update(
   if (getMigrationMode() === 'dual-write') {
     try {
       await oldCollection().update(id, id, updates);
-    } catch (err) {
-      console.warn('[referrals-migration] Old container update failed:', err);
+    } catch (err: unknown) {
+      process.stderr.write(`[referrals-migration] Old container update failed: ${err}\n`);
     }
   }
 
diff --git a/services/platform-service/src/modules/waitlist/routes.ts b/services/platform-service/src/modules/waitlist/routes.ts
index d187fc7d..d126dba3 100644
--- a/services/platform-service/src/modules/waitlist/routes.ts
+++ b/services/platform-service/src/modules/waitlist/routes.ts
@@ -25,6 +25,7 @@ import { getRequestProductId } from '../../lib/request-context.js';
 import { BadRequestError, ForbiddenError, NotFoundError } from '../../lib/errors.js';
 import { getProduct } from '../products/cache.js';
 import { dispatchWaitlistJoined } from '../../lib/webhooks.js';
+import * as auditRepo from '../audit/repository.js';
 import type { CustomField } from '../products/types.js';
 import * as repo from './repository.js';
 import {
@@ -381,8 +382,18 @@ export async function waitlistRoutes(app: FastifyInstance) {
     const ok = await repo.remove(id, entry.email);
     if (!ok) throw new NotFoundError('Delete failed');
 
-    // TODO-2: Create audit log entry for admin delete action
-    // await auditRepo.create({ userId: req.jwtPayload!.sub, action: 'waitlist.delete', ... })
+    // Create audit log entry for admin delete action
+    await auditRepo.create({
+      id: `audit_${crypto.randomUUID()}`,
+      productId: entry.productId,
+      userId: req.jwtPayload!.sub,
+      action: 'waitlist.delete',
+      category: 'waitlist',
+      details: { entryId: id, email: entry.email },
+      ipAddress: req.ip,
+      userAgent: req.headers['user-agent'],
+      createdAt: new Date().toISOString(),
+    });
 
     reply.code(204);
     return;
@@ -432,8 +443,18 @@ export async function waitlistRoutes(app: FastifyInstance) {
       }
     }
 
-    // TODO-2: Create audit log entry for batch invite
-    // await auditRepo.create({ userId: req.jwtPayload!.sub, action: 'waitlist.invite', ... })
+    // Create audit log entry for batch invite
+    await auditRepo.create({
+      id: `audit_${crypto.randomUUID()}`,
+      productId,
+      userId: req.jwtPayload!.sub,
+      action: 'waitlist.invite',
+      category: 'waitlist',
+      details: { invited, failed, total: entries.length, strategy },
+      ipAddress: req.ip,
+      userAgent: req.headers['user-agent'],
+      createdAt: new Date().toISOString(),
+    });
 
     return {
       invited,
@@ -484,7 +505,18 @@ export async function waitlistRoutes(app: FastifyInstance) {
       csvLines.push(row.join(','));
     }
 
-    // TODO-2: Create audit log entry for export action
+    // Create audit log entry for export action
+    await auditRepo.create({
+      id: `audit_${crypto.randomUUID()}`,
+      productId,
+      userId: req.jwtPayload!.sub,
+      action: 'waitlist.export',
+      category: 'waitlist',
+      details: { recordCount: items.length },
+      ipAddress: req.ip,
+      userAgent: req.headers['user-agent'],
+      createdAt: new Date().toISOString(),
+    });
 
     reply.header('Content-Type', 'text/csv');
     reply.header(