Add newrelic plugin (#4282)

.claude-plugin/marketplace.json

@@ -2146,6 +2146,20 @@
       ],
       "homepage": "https://github.com/oracle/netsuite-suitecloud-sdk"
     },
+    {
+      "name": "newrelic",
+      "description": "New Relic observability intelligence for Claude Code. Investigate APM performance, analyze cloud costs, debug Kubernetes, write NRQL queries, and respond to alerts — all from your terminal using New Relic telemetry data.",
+      "author": {
+        "name": "New Relic"
+      },
+      "category": "monitoring",
+      "source": {
+        "source": "url",
+        "url": "https://github.com/newrelic/claude-code-plugin.git",
+        "sha": "f8e5f8b62139072a22153ec92de1c0cc1af2f56a"
+      },
+      "homepage": "https://newrelic.com"
+    },
     {
       "name": "nightvision",
       "description": "Skills for working with NightVision, a DAST and API Discovery platform that finds exploitable vulnerabilities in web applications and REST APIs",