test(agent-manager): add test for loading persisted agent and sending new prompt

packages/server/agents.json

@@ -1 +1,14 @@
-[]
+[
+  {
+    "id": "fc818184-5676-4f24-a92a-77e9e15c515d",
+    "title": "Agent fc818184",
+    "sessionId": null,
+    "options": {
+      "type": "claude",
+      "sessionId": null
+    },
+    "createdAt": "2025-10-26T06:59:13.289Z",
+    "lastActivityAt": "2025-10-26T06:59:22.379Z",
+    "cwd": "/var/folders/xl/kkk9drfd3ms_t8x7rmy4z6900000gn/T/acp-test-wm5mun"
+  }
+]

packages/server/src/server/acp/agent-manager.test.ts

@@ -86,4 +86,55 @@ describe("AgentManager", () => {
     },
     120000
   );
+
+  it(
+    "should load persisted agent and send new prompt",
+    async () => {
+      const agentId = await manager.createAgent({
+        cwd: tmpDir,
+      });
+
+      await manager.sendPrompt(agentId, "echo 'first message'");
+
+      let status = manager.getAgentStatus(agentId);
+      let attempts = 0;
+      while (status !== "completed" && status !== "failed" && attempts < 60) {
+        await new Promise((resolve) => setTimeout(resolve, 1000));
+        status = manager.getAgentStatus(agentId);
+        attempts++;
+      }
+
+      expect(status).toBe("completed");
+
+      await manager.killAgent(agentId);
+
+      const newManager = new AgentManager();
+      await newManager.initialize();
+
+      const agents = newManager.listAgents();
+      const loadedAgent = agents.find((a) => a.id === agentId);
+
+      expect(loadedAgent).toBeDefined();
+      expect(loadedAgent?.id).toBe(agentId);
+      expect(loadedAgent?.cwd).toBe(tmpDir);
+
+      await newManager.sendPrompt(agentId, "echo 'second message'");
+
+      status = newManager.getAgentStatus(agentId);
+      attempts = 0;
+      while (status !== "completed" && status !== "failed" && attempts < 60) {
+        await new Promise((resolve) => setTimeout(resolve, 1000));
+        status = newManager.getAgentStatus(agentId);
+        attempts++;
+      }
+
+      expect(status).toBe("completed");
+
+      const finalUpdates = newManager.getAgentUpdates(agentId);
+      expect(finalUpdates.length).toBeGreaterThan(0);
+
+      await newManager.killAgent(agentId);
+    },
+    120000
+  );
 });

packages/server/src/server/acp/agent-manager.ts

@@ -510,12 +510,13 @@ export class AgentManager {
     const runtime = this.getRuntime(agent);
 
     // Persist current state before killing
+    // Clear sessionId so next start creates a new session
     if (runtime) {
       await this.persistence.upsert({
         id: agent.id,
         title: agent.title || `Agent ${agent.id.slice(0, 8)}`,
-        sessionId: runtime.sessionId,
+        sessionId: null,
-        options: agent.options,
+        options: { ...agent.options, sessionId: null },
         createdAt: agent.createdAt.toISOString(),
         lastActivityAt: agent.lastActivityAt.toISOString(),
         cwd: agent.cwd,