fix: clear plugin discovery cache after plugin installation (openclaw#39752)

Verified:
- pnpm build
- pnpm check
- pnpm test:macmini

Co-authored-by: GazeKingNuWu <264914544+GazeKingNuWu@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

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,
+    );
+  });
 });

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");

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" }),
 }));