Disable timer heartbeats by default for new agents

ui/src/lib/new-agent-runtime-config.test.ts

@@ -0,0 +1,34 @@
+// @vitest-environment node
+import { describe, expect, it } from "vitest";
+import { buildNewAgentRuntimeConfig } from "./new-agent-runtime-config";
+
+describe("buildNewAgentRuntimeConfig", () => {
+  it("defaults new agents to no timer heartbeat", () => {
+    expect(buildNewAgentRuntimeConfig()).toEqual({
+      heartbeat: {
+        enabled: false,
+        intervalSec: 300,
+        wakeOnDemand: true,
+        cooldownSec: 10,
+        maxConcurrentRuns: 1,
+      },
+    });
+  });
+
+  it("preserves explicit heartbeat settings", () => {
+    expect(
+      buildNewAgentRuntimeConfig({
+        heartbeatEnabled: true,
+        intervalSec: 3600,
+      }),
+    ).toEqual({
+      heartbeat: {
+        enabled: true,
+        intervalSec: 3600,
+        wakeOnDemand: true,
+        cooldownSec: 10,
+        maxConcurrentRuns: 1,
+      },
+    });
+  });
+});

ui/src/lib/new-agent-runtime-config.ts

@@ -0,0 +1,16 @@
+import { defaultCreateValues } from "../components/agent-config-defaults";
+
+export function buildNewAgentRuntimeConfig(input?: {
+  heartbeatEnabled?: boolean;
+  intervalSec?: number;
+}) {
+  return {
+    heartbeat: {
+      enabled: input?.heartbeatEnabled ?? defaultCreateValues.heartbeatEnabled,
+      intervalSec: input?.intervalSec ?? defaultCreateValues.intervalSec,
+      wakeOnDemand: true,
+      cooldownSec: 10,
+      maxConcurrentRuns: 1,
+    },
+  };
+}