seo: add Claude Code Plugin positioning, GitHub topics, badges, and keywords

- README H1 now includes 'Claude Code Plugin for Learning to Code'
- Added 4 shields.io badges (Claude Code Plugin, MIT License, Education, Open Source)
- Subtitle and first paragraph explicitly say 'Claude Code plugin'
- plugin.json: added 9 new keywords (claude-code, claude-code-plugin, anthropic, etc.)
- marketplace.json: same keyword additions for marketplace discovery
- GitHub repo: 14 topics added (claude-code, claude-code-plugin, claude-skills, etc.)
- GitHub description updated to lead with 'Claude Code plugin'
- Homepage URL set to official repo

Co-Authored-By: Warp <agent@warp.dev>

Author: 2 people

.claude-plugin/marketplace.json

@@ -20,12 +20,21 @@
       "homepage": "https://dojocoding.io/code-sensei",
       "category": "education",
       "keywords": [
-        "learning",
+        "claude-code",
+        "claude-code-plugin",
+        "claude",
+        "anthropic",
+        "claude-code-hooks",
+        "claude-code-commands",
+        "claude-skills",
+        "ai-mentor",
         "education",
+        "learning",
         "vibecoding",
         "beginner",
         "tutorial",
-        "gamification"
+        "gamification",
+        "code-learning"
       ]
     }
   ]

.claude-plugin/plugin.json

@@ -10,12 +10,21 @@
   "repository": "https://github.com/DojoCodingLabs/code-sensei",
   "license": "MIT",
   "keywords": [
-    "learning",
+    "claude-code",
+    "claude-code-plugin",
+    "claude",
+    "anthropic",
+    "claude-code-hooks",
+    "claude-code-commands",
+    "claude-skills",
+    "ai-mentor",
     "education",
+    "learning",
     "vibecoding",
     "beginner",
     "tutorial",
     "gamification",
+    "code-learning",
     "code-sensei",
     "dojo-coding"
   ]

README.md

@@ -1,8 +1,13 @@
-# 🥋 CodeSensei
+# 🥋 CodeSensei — Claude Code Plugin for Learning to Code
 
-### Learn to code while you vibecode — by [Dojo Coding](https://dojocoding.io)
+[![Claude Code Plugin](https://img.shields.io/badge/Claude_Code-Plugin-blue?logo=anthropic&logoColor=white)](https://github.com/DojoCodingLabs/code-sensei)
+[![License: MIT](https://img.shields.io/badge/License-MIT-green.svg)](https://opensource.org/licenses/MIT)
+[![Category: Education](https://img.shields.io/badge/Category-Education-orange)](https://github.com/topics/claude-code-plugin)
+[![Free & Open Source](https://img.shields.io/badge/Free-Open_Source-brightgreen)](https://github.com/DojoCodingLabs/code-sensei)
 
-**CodeSensei** is a free, open-source Claude Code plugin that teaches you programming while you build. Like Duolingo, but for coding — and instead of fake exercises, you learn from **your own projects** in real-time.
+### A free, open-source Claude Code plugin that teaches programming while you vibecode — by [Dojo Coding](https://dojocoding.io)
+
+**CodeSensei** is a **Claude Code plugin** that turns every coding session into a learning session. Like Duolingo, but for coding — and instead of fake exercises, you learn from **your own projects** in real-time.
 
 No prior coding experience needed. Seriously.