diff --git a/services/platform-service/src/lib/cosmos-init.test.ts b/services/platform-service/src/lib/cosmos-init.test.ts
index 34afbe35..f9e1eb22 100644
--- a/services/platform-service/src/lib/cosmos-init.test.ts
+++ b/services/platform-service/src/lib/cosmos-init.test.ts
@@ -38,14 +38,14 @@ describe('initCosmosIfNeeded', () => {
     vi.stubEnv('NODE_ENV', 'test');
 
     cosmosMock.initializeAllContainers.mockResolvedValue(undefined);
-    const infoSpy = vi.spyOn(console, 'info').mockImplementation(() => {});
+    const writeSpy = vi.spyOn(process.stdout, 'write').mockImplementation(() => true);
 
     const { initCosmosIfNeeded } = await import('./cosmos-init.js');
     await initCosmosIfNeeded();
 
     expect(cosmosMock.registerContainers).toHaveBeenCalledOnce();
     expect(cosmosMock.initializeAllContainers).toHaveBeenCalledOnce();
-    expect(infoSpy).toHaveBeenCalledWith('[platform-service] Cosmos containers ensured');
+    expect(writeSpy).toHaveBeenCalledWith('[platform-service] Cosmos containers ensured\n');
   });
 
   it('logs warning when initialization fails', async () => {
@@ -55,13 +55,13 @@ describe('initCosmosIfNeeded', () => {
     vi.stubEnv('NODE_ENV', 'test');
 
     cosmosMock.initializeAllContainers.mockRejectedValue(new Error('boom'));
-    const warnSpy = vi.spyOn(console, 'warn').mockImplementation(() => {});
+    const writeSpy = vi.spyOn(process.stderr, 'write').mockImplementation(() => true);
 
     const { initCosmosIfNeeded } = await import('./cosmos-init.js');
     await initCosmosIfNeeded();
 
     expect(cosmosMock.registerContainers).toHaveBeenCalledOnce();
     expect(cosmosMock.initializeAllContainers).toHaveBeenCalledOnce();
-    expect(warnSpy).toHaveBeenCalledWith('[platform-service] Cosmos init failed: boom');
+    expect(writeSpy).toHaveBeenCalledWith('[platform-service] Cosmos init failed: boom\n');
   });
 });
diff --git a/services/platform-service/src/lib/cosmos-init.ts b/services/platform-service/src/lib/cosmos-init.ts
index cde54493..2806237d 100644
--- a/services/platform-service/src/lib/cosmos-init.ts
+++ b/services/platform-service/src/lib/cosmos-init.ts
@@ -113,11 +113,9 @@ export async function initCosmosIfNeeded(): Promise<void> {
 
   try {
     await initializeAllContainers();
-    // eslint-disable-next-line no-console
-    console.info('[platform-service] Cosmos containers ensured');
+    process.stdout.write('[platform-service] Cosmos containers ensured\n');
   } catch (err) {
     const msg = err instanceof Error ? err.message : String(err);
-    // eslint-disable-next-line no-console
-    console.warn(`[platform-service] Cosmos init failed: ${msg}`);
+    process.stderr.write(`[platform-service] Cosmos init failed: ${msg}\n`);
   }
 }
diff --git a/services/platform-service/src/server.ts b/services/platform-service/src/server.ts
index 1457581e..807071ce 100644
--- a/services/platform-service/src/server.ts
+++ b/services/platform-service/src/server.ts
@@ -90,7 +90,9 @@ await initCosmosIfNeeded();
 await loadProductCache();
 
 // Seed default feature flags (idempotent, best-effort)
-seedDefaultFlags({ info: (msg: string) => console.log(`[flags-seed] ${msg}`) }).catch(() => {});
+seedDefaultFlags({ info: (msg: string) => process.stdout.write(`[flags-seed] ${msg}\n`) }).catch(
+  () => {}
+);
 
 const app = await createServiceApp({
   name: 'platform-service',