diff --git a/src/test/harness.ts b/src/test/harness.ts
index c978588..3151275 100644
--- a/src/test/harness.ts
+++ b/src/test/harness.ts
@@ -12,6 +12,7 @@ import type { EventBus, DomainEvent } from '../events/types.js';
 import { EventEmitterBus } from '../events/bus.js';
 import type { AgentManager } from '../agent/types.js';
 import { MockAgentManager, type MockAgentScenario } from '../agent/mock-manager.js';
+import type { PendingQuestion } from '../agent/types.js';
 import type { WorktreeManager, Worktree, WorktreeDiff, MergeResult } from '../git/types.js';
 import type { DispatchManager } from '../dispatch/types.js';
 import { DefaultDispatchManager } from '../dispatch/manager.js';
@@ -190,6 +191,30 @@ export interface TestHarness {
    */
   setAgentScenario(agentName: string, scenario: MockAgentScenario): void;
 
+  /**
+   * Convenience: Set agent to complete with done status.
+   */
+  setAgentDone(agentName: string, result?: string): void;
+
+  /**
+   * Convenience: Set agent to ask a question.
+   */
+  setAgentQuestion(
+    agentName: string,
+    question: string,
+    options?: Array<{ label: string; description?: string }>
+  ): void;
+
+  /**
+   * Convenience: Set agent to fail with unrecoverable error.
+   */
+  setAgentError(agentName: string, error: string): void;
+
+  /**
+   * Get pending question for an agent.
+   */
+  getPendingQuestion(agentId: string): Promise<PendingQuestion | null>;
+
   /**
    * Get events by type.
    */
@@ -276,6 +301,24 @@ export function createTestHarness(): TestHarness {
       agentManager.setScenario(agentName, scenario);
     },
 
+    setAgentDone: (agentName: string, result?: string) => {
+      agentManager.setScenario(agentName, { status: 'done', result });
+    },
+
+    setAgentQuestion: (
+      agentName: string,
+      question: string,
+      options?: Array<{ label: string; description?: string }>
+    ) => {
+      agentManager.setScenario(agentName, { status: 'question', question, options });
+    },
+
+    setAgentError: (agentName: string, error: string) => {
+      agentManager.setScenario(agentName, { status: 'unrecoverable_error', error });
+    },
+
+    getPendingQuestion: (agentId: string) => agentManager.getPendingQuestion(agentId),
+
     getEventsByType: (type: string) => eventBus.getEventsByType(type),
 
     clearEvents: () => eventBus.clearEvents(),