diff --git a/src/plugin-sdk/status-helpers.test.ts b/src/plugin-sdk/status-helpers.test.ts
new file mode 100644
index 0000000000..d63f1ee0dd
--- /dev/null
+++ b/src/plugin-sdk/status-helpers.test.ts
@@ -0,0 +1,84 @@
+import { describe, expect, it } from "vitest";
+import {
+  buildBaseChannelStatusSummary,
+  collectStatusIssuesFromLastError,
+  createDefaultChannelRuntimeState,
+} from "./status-helpers.js";
+
+describe("createDefaultChannelRuntimeState", () => {
+  it("builds default runtime state without extra fields", () => {
+    expect(createDefaultChannelRuntimeState("default")).toEqual({
+      accountId: "default",
+      running: false,
+      lastStartAt: null,
+      lastStopAt: null,
+      lastError: null,
+    });
+  });
+
+  it("merges extra fields into the default runtime state", () => {
+    expect(
+      createDefaultChannelRuntimeState("alerts", {
+        probeAt: 123,
+        healthy: true,
+      }),
+    ).toEqual({
+      accountId: "alerts",
+      running: false,
+      lastStartAt: null,
+      lastStopAt: null,
+      lastError: null,
+      probeAt: 123,
+      healthy: true,
+    });
+  });
+});
+
+describe("buildBaseChannelStatusSummary", () => {
+  it("defaults missing values", () => {
+    expect(buildBaseChannelStatusSummary({})).toEqual({
+      configured: false,
+      running: false,
+      lastStartAt: null,
+      lastStopAt: null,
+      lastError: null,
+    });
+  });
+
+  it("keeps explicit values", () => {
+    expect(
+      buildBaseChannelStatusSummary({
+        configured: true,
+        running: true,
+        lastStartAt: 1,
+        lastStopAt: 2,
+        lastError: "boom",
+      }),
+    ).toEqual({
+      configured: true,
+      running: true,
+      lastStartAt: 1,
+      lastStopAt: 2,
+      lastError: "boom",
+    });
+  });
+});
+
+describe("collectStatusIssuesFromLastError", () => {
+  it("returns runtime issues only for non-empty string lastError values", () => {
+    expect(
+      collectStatusIssuesFromLastError("telegram", [
+        { accountId: "default", lastError: " timeout " },
+        { accountId: "silent", lastError: "   " },
+        { accountId: "typed", lastError: { message: "boom" } },
+      ]),
+    ).toEqual([
+      {
+        channel: "telegram",
+        accountId: "default",
+        kind: "runtime",
+        message: "Channel error: timeout",
+      },
+    ]);
+  });
+});