docs(site): [SITE-01] inventory sources and reconcile demo coverage

refactor/scripts/demos.test.mjs

@@ -1,6 +1,7 @@
 import assert from 'node:assert/strict'
 import fs from 'node:fs'
 import path from 'node:path'
+// eslint-disable-next-line test/no-import-node-test -- Runs with the repository baseline node:test suite.
 import test from 'node:test'
 import { validateDemoInventory } from './demos.mjs'
 import { refactorDir } from './releases.mjs'
@@ -19,3 +20,20 @@ test('Demo inventory rejects missing files, routes and ecosystem packages', () =
     assert.throws(() => validateDemoInventory(changed))
   }
 })
+
+test('Demo additions require complete paths, specific routes and task ownership', () => {
+  const inventory = JSON.parse(fs.readFileSync(path.join(refactorDir, 'baselines/demo-inventory.json'), 'utf8'))
+  const additions = JSON.parse(fs.readFileSync(path.join(refactorDir, 'baselines/demo-additions.json'), 'utf8'))
+  for (const mutate of [
+    value => value.examples.pop(),
+    value => value.examples.push(value.examples[0]),
+    value => value.examples[0].route = '/?example=index',
+    value => value.examples[0].owner = 'UNKNOWN-01',
+    value => value.examples[0].source = 'docs/assets/example/../example/asr.local.js',
+    value => value.examples[0].introducedBy = '',
+  ]) {
+    const changed = structuredClone(additions)
+    mutate(changed)
+    assert.throws(() => validateDemoInventory(inventory, changed))
+  }
+})