diff --git a/extensions/slack/src/channel.contract.test.ts b/extensions/slack/src/channel.contract.test.ts
new file mode 100644
index 00000000000..3fd0e23dab5
--- /dev/null
+++ b/extensions/slack/src/channel.contract.test.ts
@@ -0,0 +1,85 @@
+import type { OpenClawConfig } from "openclaw/plugin-sdk/slack";
+import { describe } from "vitest";
+import { installChannelActionsContractSuite } from "../../../src/test-utils/channel-actions-contract.js";
+import { installChannelPluginContractSuite } from "../../../src/test-utils/channel-plugin-contract.js";
+import { slackPlugin } from "./channel.js";
+
+describe("slackPlugin contract", () => {
+  installChannelPluginContractSuite({
+    plugin: slackPlugin,
+  });
+
+  installChannelActionsContractSuite({
+    plugin: slackPlugin,
+    unsupportedAction: "poll",
+    cases: [
+      {
+        name: "configured account exposes default Slack actions",
+        cfg: {
+          channels: {
+            slack: {
+              botToken: "xoxb-test",
+              appToken: "xapp-test",
+            },
+          },
+        } as OpenClawConfig,
+        expectedActions: [
+          "send",
+          "react",
+          "reactions",
+          "read",
+          "edit",
+          "delete",
+          "download-file",
+          "pin",
+          "unpin",
+          "list-pins",
+          "member-info",
+          "emoji-list",
+        ],
+        expectedCapabilities: ["blocks"],
+      },
+      {
+        name: "interactive replies add the shared interactive capability",
+        cfg: {
+          channels: {
+            slack: {
+              botToken: "xoxb-test",
+              appToken: "xapp-test",
+              capabilities: {
+                interactiveReplies: true,
+              },
+            },
+          },
+        } as OpenClawConfig,
+        expectedActions: [
+          "send",
+          "react",
+          "reactions",
+          "read",
+          "edit",
+          "delete",
+          "download-file",
+          "pin",
+          "unpin",
+          "list-pins",
+          "member-info",
+          "emoji-list",
+        ],
+        expectedCapabilities: ["blocks", "interactive"],
+      },
+      {
+        name: "missing tokens disables the actions surface",
+        cfg: {
+          channels: {
+            slack: {
+              enabled: true,
+            },
+          },
+        } as OpenClawConfig,
+        expectedActions: [],
+        expectedCapabilities: [],
+      },
+    ],
+  });
+});