feat(FN-3396): bundle Cursor CLI as a plugin provider with dashboard auth w

Merges FN-3396's full Cursor CLI provider integration (Steps 1–4): defines a CLI-backed provider contract, adds the `fusion-plugin-cursor-runtime` plugin package with process management and runtime probes, wires dashboard auth flows and UI (ProviderCard, onboarding modal, settings), and bundles the

Fusion-Task-Id: FN-3396

packages/cli/src/__tests__/bundle-output-helpers.ts

@@ -6,6 +6,7 @@ export const cliRoot = join(__dirname, "..", "..");
 export const workspaceRoot = join(cliRoot, "..", "..");
 export const bundlePath = join(cliRoot, "dist", "bin.js");
 export const clientIndexPath = join(cliRoot, "dist", "client", "index.html");
+const cursorPluginManifestPath = join(cliRoot, "dist", "plugins", "fusion-plugin-cursor-runtime", "manifest.json");
 
 export const dashboardClientStubMarker = "Dashboard assets not built";
 
@@ -28,7 +29,7 @@ function runBuildCommand(command: string, cwd: string) {
 }
 
 function hasBuiltDashboardAssets(): boolean {
-  if (!existsSync(bundlePath) || !existsSync(clientIndexPath)) {
+  if (!existsSync(bundlePath) || !existsSync(clientIndexPath) || !existsSync(cursorPluginManifestPath)) {
     return false;
   }
 

packages/cli/src/__tests__/bundle-output.test.ts

@@ -169,6 +169,17 @@ describe("CLI bundle output", () => {
     expect(manifest.name?.length).toBeGreaterThan(0);
   });
 
+  it("dist/plugins/fusion-plugin-cursor-runtime/ is staged with a valid manifest", () => {
+    const stagedRoot = join(cliRoot, "dist", "plugins", "fusion-plugin-cursor-runtime");
+    const manifestPath = join(stagedRoot, "manifest.json");
+
+    expect(existsSync(manifestPath)).toBe(true);
+    const manifest = JSON.parse(readFileSync(manifestPath, "utf-8")) as { id?: string; name?: string };
+    expect(manifest.id).toBe("fusion-plugin-cursor-runtime");
+    expect(typeof manifest.name).toBe("string");
+    expect(manifest.name?.length).toBeGreaterThan(0);
+  });
+
   it("pi-claude-cli source imports child process helpers from node:child_process", () => {
     const processManagerSource = readFileSync(join(cliRoot, "dist", "pi-claude-cli", "src", "process-manager.ts"), "utf-8");
 

packages/cli/src/plugins/__tests__/bundled-plugin-install.test.ts

@@ -24,6 +24,7 @@ vi.mock("@fusion/core", () => ({
 // Import SUT after mocks are in place
 import {
   ensureBundledDependencyGraphPluginInstalled,
+  ensureBundledCursorRuntimePluginInstalled,
   ensureBundledPluginInstalled,
   resolvePluginEntryPath,
 } from "../bundled-plugin-install.js";
@@ -32,6 +33,7 @@ import {
 
 const BUNDLED_PLUGIN_ID = "fusion-plugin-dependency-graph";
 const HERMES_PLUGIN_ID = "fusion-plugin-hermes-runtime";
+const CURSOR_PLUGIN_ID = "fusion-plugin-cursor-runtime";
 
 function makeManifest(overrides?: Partial<{ id: string; version: string; name: string }>) {
   return {
@@ -356,6 +358,30 @@ describe("ensureBundledDependencyGraphPluginInstalled", () => {
     ).rejects.toThrow("Invalid plugin manifest");
   });
 
+  it("registers Cursor runtime through the dedicated helper", async () => {
+    const manifest = makeManifest({ id: CURSOR_PLUGIN_ID, name: "Cursor Runtime" });
+    mockExistsSync.mockImplementation((p: string) => {
+      if (p.endsWith("manifest.json") && p.includes(CURSOR_PLUGIN_ID)) return true;
+      if (p.endsWith("/src/index.ts") && p.includes(CURSOR_PLUGIN_ID)) return true;
+      return false;
+    });
+    mockReadFile.mockResolvedValue(JSON.stringify(manifest));
+    mockValidatePluginManifest.mockReturnValue({ valid: true, errors: [] });
+
+    const store = makePluginStore();
+    const loader = makePluginLoader();
+
+    const result = await ensureBundledCursorRuntimePluginInstalled(
+      store as unknown as import("@fusion/core").PluginStore,
+      loader as unknown as import("@fusion/core").PluginLoader,
+    );
+
+    expect(result).toBe("installed");
+    expect(store.registerPlugin).toHaveBeenCalledWith(
+      expect.objectContaining({ manifest: expect.objectContaining({ id: CURSOR_PLUGIN_ID }) }),
+    );
+  });
+
   it("registers Hermes from source entry when both src and dist entries exist", async () => {
     const manifest = makeManifest({ id: HERMES_PLUGIN_ID, name: "Hermes Runtime" });
     mockExistsSync.mockImplementation((p: string) => {

packages/cli/src/plugins/bundled-plugin-install.ts

@@ -5,12 +5,14 @@ import { fileURLToPath } from "node:url";
 import { validatePluginManifest, type PluginInstallation, type PluginLoader, type PluginManifest, type PluginStore } from "@fusion/core";
 
 const DEPENDENCY_GRAPH_PLUGIN_ID = "fusion-plugin-dependency-graph";
+const CURSOR_RUNTIME_PLUGIN_ID = "fusion-plugin-cursor-runtime";
 
 export const BUNDLED_PLUGIN_IDS = [
   "fusion-plugin-dependency-graph",
   "fusion-plugin-hermes-runtime",
   "fusion-plugin-openclaw-runtime",
   "fusion-plugin-paperclip-runtime",
+  "fusion-plugin-cursor-runtime",
 ] as const;
 
 export type BundledPluginId = (typeof BUNDLED_PLUGIN_IDS)[number];
@@ -156,3 +158,10 @@ export async function ensureBundledDependencyGraphPluginInstalled(
 ): Promise<EnsureBundledResult> {
   return ensureBundledPluginInstalled(pluginStore, pluginLoader, DEPENDENCY_GRAPH_PLUGIN_ID);
 }
+
+export async function ensureBundledCursorRuntimePluginInstalled(
+  pluginStore: PluginStore,
+  pluginLoader: PluginLoader,
+): Promise<EnsureBundledResult> {
+  return ensureBundledPluginInstalled(pluginStore, pluginLoader, CURSOR_RUNTIME_PLUGIN_ID);
+}

packages/cli/tsup.config.ts

@@ -12,6 +12,7 @@ const RUNTIME_PLUGIN_IDS = [
   "fusion-plugin-hermes-runtime",
   "fusion-plugin-openclaw-runtime",
   "fusion-plugin-paperclip-runtime",
+  "fusion-plugin-cursor-runtime",
 ] as const;
 
 const __dirname = dirname(fileURLToPath(import.meta.url));