diff --git a/packages/obsidian/src/library/LibraryController.ts b/packages/obsidian/src/library/LibraryController.ts
index 9a83a13..fba6a85 100644
--- a/packages/obsidian/src/library/LibraryController.ts
+++ b/packages/obsidian/src/library/LibraryController.ts
@@ -127,14 +127,19 @@ export class LibraryController {
 	}
 
 	/** Per-note key skipping already happens inside the spec (log+skip); this only surfaces one Notice per sync run naming the affected type. */
-	private warnMissingKey(spec: MediaTypeSpec): void {
+	private warnMissingKey(spec: MediaTypeSpec, quiet: boolean): void {
 		const req = KEY_REQUIREMENT[spec.typeName];
 		if (!req || this.getKey(req)) return;
-		this.notify(`Library sync: ${KEY_LABEL[req]} API key not configured — ${spec.typeName} enrichment skipped (Media DB Sync settings).`);
+		const msg = `Library sync: ${KEY_LABEL[req]} API key not configured — ${spec.typeName} enrichment skipped (Media DB Sync settings).`;
+		if (quiet) {
+			console.log(`[media-db-library] ${msg}`);
+		} else {
+			this.notify(msg);
+		}
 	}
 
 	private async runSync(spec: MediaTypeSpec, full: boolean, dryRun: boolean, quiet: boolean): Promise<LibraryReport> {
-		this.warnMissingKey(spec);
+		this.warnMissingKey(spec, quiet);
 		const deps = this.makeDeps(spec);
 		const report = await libraryFolderSync(spec, deps, { full, dryRun });
 		const mode = dryRun ? 'DRY-RUN ' : '';
diff --git a/tests/library-controller.test.ts b/tests/library-controller.test.ts
index 8f9cbfa..f61697e 100644
--- a/tests/library-controller.test.ts
+++ b/tests/library-controller.test.ts
@@ -168,7 +168,46 @@ describe('concurrency guard', () => {
 });
 
 describe('missing API key handling', () => {
-	test('missing RAWG + Comic Vine keys → one notice each for game/comic, manga/book unaffected', async () => {
+	test('missing RAWG + Comic Vine keys + quiet sync → zero notices, logged only', async () => {
+		const c = new LibraryController(fakePlugin()); // no rawgKeyId/comicvineKeyId configured
+		const notices: string[] = [];
+		const logs: string[] = [];
+		(c as any).notify = (msg: string) => notices.push(msg);
+		const calledTypes: string[] = [];
+		(c as any).makeDeps = (spec: { typeName: string }) => {
+			calledTypes.push(spec.typeName);
+			return {
+				listNotes: async () => [],
+				readNote: async () => '',
+				writeNote: async () => {},
+				sleep: async () => {},
+				log: () => {},
+				specDeps: fakeSpecDeps(),
+			};
+		};
+
+		const origLog = console.log;
+		console.log = (msg: string) => {
+			logs.push(msg);
+			origLog(msg);
+		};
+
+		try {
+			await c.syncAll(false, true);
+		} finally {
+			console.log = origLog;
+		}
+
+		expect(calledTypes.sort()).toEqual(['book', 'comic', 'game', 'manga']);
+		const keyNotices = notices.filter(m => m.includes('API key not configured'));
+		expect(keyNotices.length).toBe(0);
+		const keyLogs = logs.filter(m => m.includes('API key not configured'));
+		expect(keyLogs.length).toBe(2);
+		expect(keyLogs.some(m => m.includes('RAWG') && m.includes('game'))).toBe(true);
+		expect(keyLogs.some(m => m.includes('Comic Vine') && m.includes('comic'))).toBe(true);
+	});
+
+	test('missing RAWG + Comic Vine keys + manual (non-quiet) sync → one notice each for game/comic', async () => {
 		const c = new LibraryController(fakePlugin()); // no rawgKeyId/comicvineKeyId configured
 		const notices: string[] = [];
 		(c as any).notify = (msg: string) => notices.push(msg);
@@ -185,7 +224,7 @@ describe('missing API key handling', () => {
 			};
 		};
 
-		await c.syncAll(false, true);
+		await c.syncAll(false, false);
 
 		expect(calledTypes.sort()).toEqual(['book', 'comic', 'game', 'manga']);
 		const keyNotices = notices.filter(m => m.includes('API key not configured'));