build(studio): sync sample agent configs with a script

The Studio copy of the example agent config has to match the plugin example it
came from, and a test enforces that, but reproducing it was a manual cp nobody
would remember the source path for.

Add sync-sample-agents alongside fetch-styles, which follows the same pattern in
this package: a tsx script that writes a generated file which stays committed, so
dev, build, and test need no extra step. The source-to-target map is a list, so a
second sample is a two-line change.

The drift test now names the command to run when it fails.

Signed-off-by: mschwab <mschwab@nvidia.com>

Author: marcusds

web/packages/studio/package.json

@@ -36,7 +36,8 @@
     "update-warning-count": "pnpm tsx ../common/scripts/update-max-warnings.ts",
     "screenshots": "tsx screenshots/capture.ts",
     "feature-flags": "tsx scripts/feature-flag-matrix.ts",
-    "fetch-styles": "tsx scripts/fetch-styles.ts"
+    "fetch-styles": "tsx scripts/fetch-styles.ts",
+    "sync-sample-agents": "tsx scripts/sync-sample-agents.ts"
   },
   "dependencies": {
     "@assistant-ui/react": "^0.12.28",

web/packages/studio/scripts/sync-sample-agents.ts

@@ -0,0 +1,41 @@
+#!/usr/bin/env node
+// SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+/* eslint-disable no-console -- CLI script */
+/**
+ * Copies the agent configs behind Create Example Agent from the plugin examples
+ * that own them into public/sample-agents/, so Studio serves the same bytes the
+ * platform ships rather than an edited fork. Run after changing a source config;
+ * src/constants/sampleAgents.test.ts fails when the two drift.
+ */
+import { copyFile, mkdir } from 'node:fs/promises';
+import { dirname, resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const STUDIO_ROOT = resolve(__dirname, '..');
+const REPO_ROOT = resolve(STUDIO_ROOT, '../../..');
+
+/** source: repo-relative. target: studio-package-relative. */
+const SAMPLE_AGENT_CONFIGS = [
+  {
+    source: 'plugins/nemo-agents/examples/nemo-agent-config/email-phishing-agent/agent.yaml',
+    target: 'public/sample-agents/email-phishing-agent/agent.yaml',
+  },
+];
+
+async function main() {
+  for (const { source, target } of SAMPLE_AGENT_CONFIGS) {
+    const from = resolve(REPO_ROOT, source);
+    const to = resolve(STUDIO_ROOT, target);
+    await mkdir(dirname(to), { recursive: true });
+    await copyFile(from, to);
+    console.log(`${source} -> ${target}`);
+  }
+}
+
+main().catch((error: unknown) => {
+  console.error(error);
+  process.exitCode = 1;
+});

web/packages/studio/src/constants/sampleAgents.test.ts

@@ -27,13 +27,14 @@ describe('SAMPLE_AGENTS', () => {
     expect(config.models?.default).toBeDefined();
   });
 
-  it('the shipped asset stays identical to the plugin example it was copied from', () => {
+  it('the shipped asset stays identical to the plugin example it is copied from', () => {
     const shipped = readFileSync(
       join(PUBLIC_DIR, 'sample-agents/email-phishing-agent/agent.yaml'),
       'utf8'
     );
     const source = readFileSync(join(PLUGIN_EXAMPLES, 'email-phishing-agent/agent.yaml'), 'utf8');
 
+    // Regenerate with `pnpm --filter nemo-studio-ui sync-sample-agents`.
     expect(shipped).toBe(source);
   });