fix(heartbeat): default target none and internalize relay prompts

src/infra/heartbeat-events-filter.test.ts

@@ -0,0 +1,21 @@
+import { describe, expect, it } from "vitest";
+import { buildCronEventPrompt, buildExecEventPrompt } from "./heartbeat-events-filter.js";
+
+describe("heartbeat event prompts", () => {
+  it("builds user-relay cron prompt by default", () => {
+    const prompt = buildCronEventPrompt(["Cron: rotate logs"]);
+    expect(prompt).toContain("Please relay this reminder to the user");
+  });
+
+  it("builds internal-only cron prompt when delivery is disabled", () => {
+    const prompt = buildCronEventPrompt(["Cron: rotate logs"], { deliverToUser: false });
+    expect(prompt).toContain("Handle this reminder internally");
+    expect(prompt).not.toContain("Please relay this reminder to the user");
+  });
+
+  it("builds internal-only exec prompt when delivery is disabled", () => {
+    const prompt = buildExecEventPrompt({ deliverToUser: false });
+    expect(prompt).toContain("Handle the result internally");
+    expect(prompt).not.toContain("Please relay the command output to the user");
+  });
+});