diff --git a/src/main/services/SettingsService.ts b/src/main/services/SettingsService.ts
index 1c091f6..3b61286 100644
--- a/src/main/services/SettingsService.ts
+++ b/src/main/services/SettingsService.ts
@@ -17,7 +17,11 @@ const SettingsSchema = z.object({
   // v0.3.0 Cut E — 양방향 git sync 설정. 모두 optional — 미구성 시 sync 비활성.
   sync_repo_url: z.string().nullable().optional(),
   sync_auto_enabled: z.boolean().optional(),
-  sync_interval_min: z.number().int().min(5).optional()
+  sync_interval_min: z.number().int().min(5).optional(),
+  // v0.3.1 Cut F
+  vision_model: z.string().nullable().optional(),
+  vision_capable_cache: z.array(z.string()).optional(),
+  vision_cache_at: z.string().optional()
 }).strict();
 
 export type Settings = z.infer<typeof SettingsSchema>;
@@ -127,6 +131,30 @@ export class SettingsService {
     await this.persist(next);
   }
 
+  /** v0.3.1 Cut F — 선택된 vision model. null = 미선택. */
+  async getVisionModel(): Promise<string | null> {
+    const s = await this.load();
+    return s.vision_model ?? null;
+  }
+
+  async setVisionModel(value: string | null): Promise<void> {
+    const current = await this.load();
+    const next: Settings = { ...current, vision_model: value };
+    await this.persist(next);
+  }
+
+  /** v0.3.1 Cut F — /api/tags 조회 결과 캐시. 기본 빈 배열 + null timestamp. */
+  async getVisionCapableCache(): Promise<{ models: string[]; at: string | null }> {
+    const s = await this.load();
+    return { models: s.vision_capable_cache ?? [], at: s.vision_cache_at ?? null };
+  }
+
+  async setVisionCapableCache(models: string[], now: Date): Promise<void> {
+    const current = await this.load();
+    const next: Settings = { ...current, vision_capable_cache: models, vision_cache_at: now.toISOString() };
+    await this.persist(next);
+  }
+
   private async persist(next: Settings): Promise<void> {
     await mkdir(dirname(this.filePath), { recursive: true });
     const tmpPath = this.filePath + '.tmp';
diff --git a/tests/unit/SettingsService.test.ts b/tests/unit/SettingsService.test.ts
index 89fa152..c1e7343 100644
--- a/tests/unit/SettingsService.test.ts
+++ b/tests/unit/SettingsService.test.ts
@@ -90,4 +90,31 @@ describe('SettingsService', () => {
       await expect(svc.setSyncIntervalMin(10.5)).rejects.toThrow();
     });
   });
+
+  describe('v0.3.1 Cut F — vision settings', () => {
+    it('getVisionModel() defaults to null', async () => {
+      expect(await svc.getVisionModel()).toBeNull();
+    });
+
+    it('setVisionModel() / getVisionModel() round-trip including null clear', async () => {
+      await svc.setVisionModel('llava:13b');
+      expect(await svc.getVisionModel()).toBe('llava:13b');
+      await svc.setVisionModel(null);
+      expect(await svc.getVisionModel()).toBeNull();
+    });
+
+    it('getVisionCapableCache() defaults to empty models + null at', async () => {
+      const cache = await svc.getVisionCapableCache();
+      expect(cache.models).toEqual([]);
+      expect(cache.at).toBeNull();
+    });
+
+    it('setVisionCapableCache() persists models + ISO timestamp', async () => {
+      const now = new Date('2026-05-09T12:00:00.000Z');
+      await svc.setVisionCapableCache(['llava:13b', 'llava:7b'], now);
+      const cache = await svc.getVisionCapableCache();
+      expect(cache.models).toEqual(['llava:13b', 'llava:7b']);
+      expect(cache.at).toBe('2026-05-09T12:00:00.000Z');
+    });
+  });
 });