Add Codex CLI plugin manifest

.codex-plugin/plugin.json

@@ -0,0 +1,24 @@
+{
+  "name": "magic-mcp",
+  "version": "0.1.0",
+  "description": "Frontend development assistant from Codex via 21st dev Magic",
+  "author": {
+    "name": "21st-dev",
+    "url": "https://github.com/21st-dev/magic-mcp"
+  },
+  "homepage": "https://github.com/21st-dev/magic-mcp",
+  "repository": "https://github.com/21st-dev/magic-mcp",
+  "keywords": [
+    "mcp",
+    "codex"
+  ],
+  "mcpServers": "./.mcp.json",
+  "interface": {
+    "displayName": "Magic MCP",
+    "shortDescription": "Frontend development assistant from Codex via 21st dev Magic",
+    "longDescription": "It is like v0 but in your Cursor/WindSurf/Cline. 21st dev Magic MCP server for working with your frontend.",
+    "category": "Development",
+    "websiteURL": "https://github.com/21st-dev/magic-mcp"
+  },
+  "skills": "./skills/"
+}

.github/workflows/plugin-quality-gate.yml

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+name: Plugin Quality Gate
+
+on:
+  pull_request:
+    paths:
+      - ".codex-plugin/**"
+      - "skills/**"
+      - ".mcp.json"
+
+jobs:
+  scan:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Codex plugin quality gate
+        uses: hashgraph-online/hol-codex-plugin-scanner-action@v1
+        with:
+          plugin_dir: "."
+          min_score: 80
+          fail_on_severity: high

.mcp.json

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+{
+  "mcpServers": {
+    "magic-mcp": {
+      "command": "npx",
+      "args": [
+        "-y",
+        "@21st-dev/magic@latest"
+      ]
+    }
+  }
+}

skills/magic-mcp/SKILL.md

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+---
+name: magic-mcp
+description: Frontend development assistant from Codex via 21st dev Magic
+---
+
+# Magic MCP for Codex
+
+Use Magic MCP from Codex via MCP.
+
+## When to use
+- When you need magic-mcp capabilities in your Codex workflow
+- See https://github.com/21st-dev/magic-mcp for full setup instructions