Add OpenAI plugin submission bundle

Build a Codex-native OpenAI plugin with bundled hooks, public listing metadata, submission guidance, privacy coverage, and regression tests.

AI assistance: OpenAI Codex prepared and validated these changes under maintainer direction.

scripts/lib/codex-plugin.js

@@ -0,0 +1,44 @@
+export function buildCodexPluginManifest(rootManifest) {
+  return {
+    name: rootManifest.name,
+    version: rootManifest.version,
+    description: 'Design and refine frontend interfaces with coding agents.',
+    author: {
+      ...rootManifest.author,
+      name: 'Renaissance Geek Inc',
+      url: rootManifest.homepage,
+    },
+    homepage: rootManifest.homepage,
+    repository: rootManifest.repository,
+    license: 'Apache-2.0',
+    keywords: [
+      'design',
+      'frontend',
+      'ui',
+      'ux',
+      'accessibility',
+      'anti-patterns',
+    ],
+    skills: './skills/',
+    interface: {
+      displayName: 'Impeccable',
+      shortDescription: 'Design and refine interfaces',
+      longDescription: 'Create, critique, and refine frontend interfaces with your coding agent. Impeccable provides 23 focused design commands, live browser iteration for exploring visual directions, and automatic checks that flag common design anti-patterns as you work.',
+      developerName: 'Renaissance Geek Inc',
+      category: 'Creativity',
+      capabilities: ['Interactive', 'Read', 'Write'],
+      websiteURL: rootManifest.homepage,
+      privacyPolicyURL: `${rootManifest.homepage}/privacy`,
+      termsOfServiceURL: `${rootManifest.repository}/blob/main/LICENSE`,
+      defaultPrompt: [
+        'critique this interface and prioritize what to fix.',
+        'craft a distinctive landing page, then polish the result.',
+        'start impeccable live so I can explore bolder or more delightful variants.',
+      ],
+      brandColor: '#E2AE38',
+      composerIcon: './assets/icon.png',
+      logo: './assets/icon.png',
+      screenshots: [],
+    },
+  };
+}