feat: add native Codex support for pstack

.agents/plugins/marketplace.json

@@ -0,0 +1,32 @@
+{
+  "name": "cursor-plugins",
+  "interface": {
+    "displayName": "Cursor Plugins"
+  },
+  "plugins": [
+    {
+      "name": "origin-apps",
+      "source": {
+        "source": "local",
+        "path": "./origin-apps"
+      },
+      "policy": {
+        "installation": "AVAILABLE",
+        "authentication": "ON_INSTALL"
+      },
+      "category": "Developer Tools"
+    },
+    {
+      "name": "pstack",
+      "source": {
+        "source": "local",
+        "path": "./harness/pstack/codex"
+      },
+      "policy": {
+        "installation": "AVAILABLE",
+        "authentication": "ON_INSTALL"
+      },
+      "category": "Developer Tools"
+    }
+  ]
+}

.github/workflows/validate-plugins.yml

@@ -5,6 +5,7 @@ on:
     paths:
       - ".cursor-plugin/marketplace.json"
       - ".claude-plugin/marketplace.json"
+      - ".agents/plugins/marketplace.json"
       - "**/plugin.json"
       - "schemas/**"
       - "pstack/**"
@@ -20,7 +21,7 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: 22
+          node-version: ">=24.22 <25"
 
       - name: Install dependencies
         run: npm install --no-save ajv ajv-formats fast-check@4.5.3
@@ -33,3 +34,6 @@ jobs:
 
       - name: Test pstack skill scripts
         run: node --disable-warning=ExperimentalWarning --test pstack/skills/*/scripts/test/*.test.ts
+
+      - name: Test pstack harness generation and Codex history
+        run: node --test scripts/test/*.test.mjs