Fix Desktop Netx Ops preset using host standard and workflow-ptc.

Prefer Desktop's standard.patch.yml / align CLI worker-thread rows to
workflow-ptc, and refuse compositions the host cannot resolve.

Co-authored-by: Cursor <cursoragent@cursor.com>

test/agent-preset-install.test.mjs

@@ -0,0 +1,81 @@
+import assert from 'node:assert/strict'
+import { mkdirSync, mkdtempSync, writeFileSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+import { describe, it } from 'node:test'
+import {
+  alignWorkflowEngineForHost,
+  collectCompositionPackageNames,
+  extractPluginsBodyFromStandardPatch,
+  packageInstalledAbove,
+  pluginsBodyToAgentCordis,
+} from '../src/agent-preset-install.ts'
+
+const SAMPLE_PATCH = `# comment
+- insert:
+    - id: preset-standard
+      name: '@deepseek-ai/dsh-agent-preset'
+      config:
+        id: standard
+        order: 1
+        plugins:
+          - id: persona
+            name: '@deepseek-ai/dsh-persona'
+            config:
+              prefix: hello
+          - id: tool-skill
+            name: '@deepseek-ai/dsh-tool-skill'
+          - id: workflow-worker-thread
+            name: '@deepseek-ai/dsh-workflow-worker-thread'
+`
+
+function seedPackage(root, name) {
+  const dir = join(root, 'node_modules', ...name.split('/'))
+  mkdirSync(dir, { recursive: true })
+  writeFileSync(join(dir, 'package.json'), JSON.stringify({ name, version: '0.0.0' }))
+}
+
+describe('extractPluginsBodyFromStandardPatch', () => {
+  it('keeps indented plugin rows and drops the insert wrapper', () => {
+    const body = extractPluginsBodyFromStandardPatch(SAMPLE_PATCH)
+    assert.match(body, /^          - id: persona$/m)
+    assert.match(body, /workflow-worker-thread/)
+    assert.doesNotMatch(body, /^- insert:/m)
+    assert.doesNotMatch(body, /preset-standard/)
+  })
+})
+
+describe('pluginsBodyToAgentCordis', () => {
+  it('strips the declarative plugin indent', () => {
+    const body = extractPluginsBodyFromStandardPatch(SAMPLE_PATCH)
+    const cordis = pluginsBodyToAgentCordis(body)
+    assert.match(cordis, /^- id: persona$/m)
+    assert.match(cordis, /^  name: '@deepseek-ai\/dsh-persona'$/m)
+    assert.doesNotMatch(cordis, /^          - id:/m)
+  })
+})
+
+describe('alignWorkflowEngineForHost', () => {
+  const worker = '- id: workflow-worker-thread\n  name: \'@deepseek-ai/dsh-workflow-worker-thread\'\n'
+
+  it('rewrites worker-thread → ptc when only ptc is installed above bases', () => {
+    const root = mkdtempSync(join(tmpdir(), 'netxops-preset-'))
+    seedPackage(root, '@deepseek-ai/dsh-workflow-ptc')
+    assert.equal(packageInstalledAbove('@deepseek-ai/dsh-workflow-ptc', [root]), true)
+    assert.equal(packageInstalledAbove('@deepseek-ai/dsh-workflow-worker-thread', [root]), false)
+    const out = alignWorkflowEngineForHost(worker, [root])
+    assert.match(out, /- id: workflow-ptc/)
+    assert.match(out, /dsh-workflow-ptc/)
+    assert.doesNotMatch(out, /workflow-worker-thread/)
+  })
+
+  it('collectCompositionPackageNames reads quoted names', () => {
+    const names = collectCompositionPackageNames(
+      '- id: a\n  name: \'@deepseek-ai/dsh-workflow-ptc\'\n- id: b\n  name: "@deepseek-ai/dsh-tool-workflow"\n',
+    )
+    assert.deepEqual(
+      names.sort(),
+      ['@deepseek-ai/dsh-tool-workflow', '@deepseek-ai/dsh-workflow-ptc'].sort(),
+    )
+  })
+})