Update manifest

manifest.json

@@ -1,12 +1,17 @@
 [
   {
     "filename": "AGENTS.md",
-    "description": "AI agent instructions and coding guidelines",
+    "description": "AI coding guidelines for Phaser 3 playable ads. Covers stack (Phaser 3.90, TypeScript, Vite), supported ad networks, project structure, responsibility split between game modules and GameScene, performance rules, responsive coordinate system (sx/sy/sd), and CTA fallback chain.",
     "url": "https://drive.google.com/file/d/1O3Rp9HIfVA1Urr3APFyvIM0KDBxhEOOS/view?usp=sharing"
   },
   {
     "filename": "LOCALIZATION.md",
-    "description": "Localization workflow and string guidelines",
+    "description": "Runtime localization system for playable ads. Documents the two-layer pattern (reusable runtime + project adapter), 10 supported locales (EN/DE/FR/ES/PT/RU/ZH/KO/JA), locale detection order (URL override → browser language → English fallback), and a drop-in AI prompt for implementing localization in a new or existing project.",
     "url": "https://drive.google.com/file/d/1bDldnMJX6Vwngkakeve9cxonG7NU_KZo/view?usp=drive_link"
+  },
+  {
+    "filename": ".gitignore",
+    "description": "Standard .gitignore for Phaser 3 / Vite playable ad projects.",
+    "url": "https://drive.google.com/file/d/1wh3Yo_HZDxLqe4EDM6KsvWeG8eFzp5pG/view?usp=drive_link"
   }
 ]