diff --git a/CHANGELOG.md b/CHANGELOG.md
index dfe012b9065..f60c95a0c3c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,7 @@ Docs: https://docs.openclaw.ai
 
 - Docker/runtime image: prune dev dependencies, strip build-only dist metadata for smaller Docker images. (#40307) Thanks @vincentkoc.
 - Plugins/channel onboarding: prefer bundled channel plugins over duplicate npm-installed copies during onboarding and release-channel sync, preventing bundled plugins from being shadowed by npm installs with the same plugin ID. (#40092)
+- Feishu/plugin onboarding: clear the short-lived plugin discovery cache before reloading the registry after installing a channel plugin, so onboarding no longer re-prompts to download Feishu immediately after a successful install. Fixes #39642. (#39752) Thanks @GazeKingNuWu.
 - macOS app/chat UI: route browser proxy through the local node browser service, preserve plain-text paste semantics, strip completed assistant trace/debug wrapper noise from transcripts, refresh permission state after returning from System Settings, and tolerate malformed cron rows in the macOS tab. (#39516) Thanks @Imhermes1.
 - Mattermost replies: keep `root_id` pinned to the existing thread root when an agent replies inside a thread, while still using reply-target threading for top-level posts. (#27744) thanks @hnykda.
 - Agents/failover: detect Amazon Bedrock `Too many tokens per day` quota errors as rate limits across fallback, cron retry, and memory embeddings while keeping context-window `too many tokens per request` errors out of the rate-limit lane. (#39377) Thanks @gambletan.
diff --git a/src/commands/onboarding/plugin-install.test.ts b/src/commands/onboarding/plugin-install.test.ts
index b04769dcb54..2be78d9a6fc 100644
--- a/src/commands/onboarding/plugin-install.test.ts
+++ b/src/commands/onboarding/plugin-install.test.ts
@@ -49,12 +49,21 @@ vi.mock("../../plugins/loader.js", () => ({
   loadOpenClawPlugins: vi.fn(),
 }));
 
+const clearPluginDiscoveryCache = vi.fn();
+vi.mock("../../plugins/discovery.js", () => ({
+  clearPluginDiscoveryCache: () => clearPluginDiscoveryCache(),
+}));
+
 import fs from "node:fs";
 import type { ChannelPluginCatalogEntry } from "../../channels/plugins/catalog.js";
 import type { OpenClawConfig } from "../../config/config.js";
+import { loadOpenClawPlugins } from "../../plugins/loader.js";
 import type { WizardPrompter } from "../../wizard/prompts.js";
 import { makePrompter, makeRuntime } from "./__tests__/test-utils.js";
-import { ensureOnboardingPluginInstalled } from "./plugin-install.js";
+import {
+  ensureOnboardingPluginInstalled,
+  reloadOnboardingPluginRegistry,
+} from "./plugin-install.js";
 
 const baseEntry: ChannelPluginCatalogEntry = {
   id: "zalo",
@@ -236,4 +245,27 @@ describe("ensureOnboardingPluginInstalled", () => {
     expect(note).toHaveBeenCalled();
     expect(runtime.error).not.toHaveBeenCalled();
   });
+
+  it("clears discovery cache before reloading the onboarding plugin registry", () => {
+    const runtime = makeRuntime();
+    const cfg: OpenClawConfig = {};
+
+    reloadOnboardingPluginRegistry({
+      cfg,
+      runtime,
+      workspaceDir: "/tmp/openclaw-workspace",
+    });
+
+    expect(clearPluginDiscoveryCache).toHaveBeenCalledTimes(1);
+    expect(loadOpenClawPlugins).toHaveBeenCalledWith(
+      expect.objectContaining({
+        config: cfg,
+        workspaceDir: "/tmp/openclaw-workspace",
+        cache: false,
+      }),
+    );
+    expect(clearPluginDiscoveryCache.mock.invocationCallOrder[0]).toBeLessThan(
+      vi.mocked(loadOpenClawPlugins).mock.invocationCallOrder[0] ?? Number.POSITIVE_INFINITY,
+    );
+  });
 });
diff --git a/src/commands/onboarding/plugin-install.ts b/src/commands/onboarding/plugin-install.ts
index 14245461e21..b4aabc06646 100644
--- a/src/commands/onboarding/plugin-install.ts
+++ b/src/commands/onboarding/plugin-install.ts
@@ -9,6 +9,7 @@ import {
   findBundledPluginSourceInMap,
   resolveBundledPluginSources,
 } from "../../plugins/bundled-sources.js";
+import { clearPluginDiscoveryCache } from "../../plugins/discovery.js";
 import { enablePluginInConfig } from "../../plugins/enable.js";
 import { installPluginFromNpmSpec } from "../../plugins/install.js";
 import { buildNpmResolutionInstallFields, recordPluginInstall } from "../../plugins/installs.js";
@@ -224,6 +225,7 @@ export function reloadOnboardingPluginRegistry(params: {
   runtime: RuntimeEnv;
   workspaceDir?: string;
 }): void {
+  clearPluginDiscoveryCache();
   const workspaceDir =
     params.workspaceDir ?? resolveAgentWorkspaceDir(params.cfg, resolveDefaultAgentId(params.cfg));
   const log = createSubsystemLogger("plugins");
diff --git a/src/cron/isolated-agent/run.test-harness.ts b/src/cron/isolated-agent/run.test-harness.ts
index c47fbec9f88..6a1fa1c3dff 100644
--- a/src/cron/isolated-agent/run.test-harness.ts
+++ b/src/cron/isolated-agent/run.test-harness.ts
@@ -64,6 +64,7 @@ vi.mock("../../agents/skills/refresh.js", () => ({
 }));
 
 vi.mock("../../agents/workspace.js", () => ({
+  DEFAULT_IDENTITY_FILENAME: "IDENTITY.md",
   ensureAgentWorkspace: vi.fn().mockResolvedValue({ dir: "/tmp/workspace" }),
 }));