fix: add .claude-plugin directory with marketplace.json

.claude-plugin/marketplace.json

@@ -0,0 +1,18 @@
+{
+  "name": "smg-dev-guide",
+  "description": "SMG Development Guide — process-enforcing skills for Shepherd Model Gateway contributors",
+  "owner": {
+    "name": "LightSeek"
+  },
+  "plugins": [
+    {
+      "name": "smg",
+      "description": "4 process-enforcing skills for the Shepherd Model Gateway — orientation, implementation (with 15 subsystem recipes), PR review, and pre-ship quality gates",
+      "version": "0.2.0",
+      "source": "./",
+      "author": {
+        "name": "LightSeek"
+      }
+    }
+  ]
+}

.claude-plugin/plugin.json

@@ -0,0 +1,14 @@
+{
+  "name": "smg",
+  "description": "4 process-enforcing skills for the Shepherd Model Gateway — orientation, implementation (with 15 subsystem recipes), PR review, and pre-ship quality gates",
+  "version": "0.2.0",
+  "author": {
+    "name": "LightSeek"
+  },
+  "homepage": "https://github.com/lightseekorg/smg-dev-guide",
+  "repository": "https://github.com/lightseekorg/smg-dev-guide",
+  "license": "Apache-2.0",
+  "keywords": ["smg", "llm-gateway", "rust", "kubernetes", "routing", "grpc"],
+  "skills": "./skills/",
+  "commands": "./commands/"
+}

README.md

@@ -5,7 +5,7 @@ Claude Code plugin for the [Shepherd Model Gateway](https://github.com/lightseek
 ## Install
 
 ```bash
-claude plugins add github:lightseekorg/smg-dev-guide
+claude marketplace add lightseekorg/smg-dev-guide
 ```
 
 ## Usage