feat: plugin scaffold

.claude-plugin/marketplace.json

@@ -0,0 +1,14 @@
+{
+  "$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
+  "name": "codex-crew",
+  "description": "Codex as a Claude Code subagent",
+  "owner": { "name": "smartass" },
+  "plugins": [
+    {
+      "name": "codex-crew",
+      "description": "Codex as a first-class subagent: delegate, review, consult",
+      "source": "./",
+      "category": "productivity"
+    }
+  ]
+}

.claude-plugin/plugin.json

@@ -0,0 +1,5 @@
+{
+  "name": "codex-crew",
+  "version": "0.1.0",
+  "description": "Codex as a first-class Claude Code subagent: delegate tasks, review code, consult on specs/plans. Inherits user codex config (no sandboxes), resumable sessions, deterministic stall detection."
+}