diff --git a/src/infrastructure/di/container.ts b/src/infrastructure/di/container.ts
index ca97c947..fd1e6a42 100644
--- a/src/infrastructure/di/container.ts
+++ b/src/infrastructure/di/container.ts
@@ -21,6 +21,7 @@ import type { IGitClient } from '../../domain/interfaces/IGitClient';
 import { NotesService } from '../services/NotesService';
 import { GitClient } from '../git/GitClient';
 import { MemoryRepository } from '../repositories/MemoryRepository';
+import { TrailerService } from '../services/TrailerService';
 import { EventBus } from '../events/EventBus';
 import { createLogger } from '../logging/factory';
 import { createLLMClient } from '../llm/LLMClientFactory';
@@ -55,6 +56,7 @@ export function createContainer(options?: IContainerOptions): AwilixContainer<IC
     notesService: asClass(NotesService).singleton(),
     gitClient: asClass(GitClient).singleton(),
     memoryRepository: asClass(MemoryRepository).singleton(),
+    trailerService: asClass(TrailerService).singleton(),
 
     eventBus: asFunction(() => {
       const bus = new EventBus(container.cradle.logger);
diff --git a/src/infrastructure/di/types.ts b/src/infrastructure/di/types.ts
index ea13a895..fd21c23b 100644
--- a/src/infrastructure/di/types.ts
+++ b/src/infrastructure/di/types.ts
@@ -23,6 +23,7 @@ import type { ILiberateService } from '../../application/interfaces/ILiberateSer
 import type { IMemoryContextLoader } from '../../domain/interfaces/IMemoryContextLoader';
 import type { IContextFormatter } from '../../domain/interfaces/IContextFormatter';
 import type { ISessionCaptureService } from '../../domain/interfaces/ISessionCaptureService';
+import type { ITrailerService } from '../../domain/interfaces/ITrailerService';
 
 export interface ICradle {
   // Infrastructure
@@ -30,6 +31,7 @@ export interface ICradle {
   notesService: INotesService;
   gitClient: IGitClient;
   memoryRepository: IMemoryRepository;
+  trailerService: ITrailerService;
   triageService: IGitTriageService;
   llmClient: ILLMClient | null;
   eventBus: IEventBus;
diff --git a/tests/unit/infrastructure/di/container.test.ts b/tests/unit/infrastructure/di/container.test.ts
index 65b10a60..09546803 100644
--- a/tests/unit/infrastructure/di/container.test.ts
+++ b/tests/unit/infrastructure/di/container.test.ts
@@ -41,6 +41,7 @@ describe('createContainer', () => {
       assert.ok(cradle.notesService);
       assert.ok(cradle.gitClient);
       assert.ok(cradle.memoryRepository);
+      assert.ok(cradle.trailerService);
       assert.ok(cradle.eventBus);
       assert.ok(cradle.triageService);
       assert.ok(cradle.memoryService);
@@ -162,6 +163,22 @@ describe('createContainer', () => {
     });
   });
 
+  describe('trailerService', () => {
+    it('should resolve with expected interface', () => {
+      const container = createContainer();
+      const { trailerService } = container.cradle;
+
+      assert.equal(typeof trailerService.readTrailers, 'function');
+      assert.equal(typeof trailerService.formatTrailers, 'function');
+      assert.equal(typeof trailerService.queryTrailers, 'function');
+    });
+
+    it('should return singleton within container scope', () => {
+      const container = createContainer();
+      assert.equal(container.cradle.trailerService, container.cradle.trailerService);
+    });
+  });
+
   describe('hook services', () => {
     it('should resolve hook services with expected interfaces', () => {
       const container = createContainer();