diff --git a/.github/plugin/marketplace.json b/.github/plugin/marketplace.json
index 0f1852131..3d1a39c77 100644
--- a/.github/plugin/marketplace.json
+++ b/.github/plugin/marketplace.json
@@ -293,6 +293,32 @@
       "description": "Build high-performance Model Context Protocol servers in Rust using the official rmcp SDK with async/await, procedural macros, and type-safe implementations.",
       "version": "1.0.0"
     },
+    {
+      "name": "sciagent",
+      "description": "Scientific analysis agents with built-in rigor enforcement — planning, data QC, code review, reporting, and reproducibility. 9 agents and 9 skills for researchers and data scientists.",
+      "version": "1.2.0",
+      "author": {
+        "name": "smestern",
+        "url": "https://github.com/smestern"
+      },
+      "homepage": "https://github.com/smestern/sciagent-plugin",
+      "keywords": [
+        "scientific-analysis",
+        "data-analysis",
+        "rigor",
+        "reproducibility",
+        "data-qc",
+        "code-review",
+        "report-writing"
+      ],
+      "license": "MIT",
+      "repository": "https://github.com/smestern/sciagent",
+      "source": {
+        "source": "github",
+        "repo": "smestern/sciagent-plugin",
+        "ref": "v1.2.0"
+      }
+    },
     {
       "name": "security-best-practices",
       "source": "security-best-practices",
diff --git a/plugins/external.json b/plugins/external.json
index ec8c8073a..eee715f47 100644
--- a/plugins/external.json
+++ b/plugins/external.json
@@ -16,5 +16,23 @@
       "repo": "microsoft/azure-skills",
       "path": ".github/plugins/azure-skills"
     }
+  },
+  {
+    "name": "sciagent",
+    "description": "Scientific analysis agents with built-in rigor enforcement — planning, data QC, code review, reporting, and reproducibility. 9 agents and 9 skills for researchers and data scientists.",
+    "version": "1.2.0",
+    "author": {
+      "name": "smestern",
+      "url": "https://github.com/smestern"
+    },
+    "homepage": "https://github.com/smestern/sciagent-plugin",
+    "keywords": ["scientific-analysis", "data-analysis", "rigor", "reproducibility", "data-qc", "code-review", "report-writing"],
+    "license": "MIT",
+    "repository": "https://github.com/smestern/sciagent",
+    "source": {
+      "source": "github",
+      "repo": "smestern/sciagent-plugin",
+      "ref": "v1.2.0"
+    }
   }
 ]