feat(plugin): add Codex plugin support and integration docs (#4665)

Co-authored-by: Gabriel Stein <gabrielstein416@gmail.com>

docs/integrations.mdx

@@ -381,4 +381,25 @@ Here are the available integrations for Mem0:
   >
     Build AI agents with persistent memory using Mastra's framework and tools.
   </Card>
+  <Card
+    title="Claude Code"
+    icon="terminal"
+    href="/integrations/claude-code"
+  >
+    Add persistent memory to Claude Code and Cowork with MCP server, lifecycle hooks, and SDK skill.
+  </Card>
+  <Card
+    title="Cursor"
+    icon="i-cursor"
+    href="/integrations/cursor"
+  >
+    Add persistent memory to Cursor with MCP server, lifecycle hooks, and context-aware coding.
+  </Card>
+  <Card
+    title="Codex"
+    icon="robot"
+    href="/integrations/codex"
+  >
+    Add persistent memory to OpenAI Codex with MCP server and skill-based memory protocol.
+  </Card>
 </CardGroup>