diff --git a/config/claude/default.nix b/config/claude/default.nix
index 4fd538924..c37761761 100644
--- a/config/claude/default.nix
+++ b/config/claude/default.nix
@@ -23,4 +23,8 @@
     source = ./statusline-git.sh;
     executable = true;
   };
+
+  home.file.".claude/plugins/known_marketplaces.json" = {
+    source = ./known_marketplaces.json;
+  };
 }
diff --git a/config/claude/known_marketplaces.json b/config/claude/known_marketplaces.json
new file mode 100644
index 000000000..c79510636
--- /dev/null
+++ b/config/claude/known_marketplaces.json
@@ -0,0 +1,26 @@
+{
+  "claude-code-plugins": {
+    "source": {
+      "source": "git",
+      "url": "https://github.com/anthropics/claude-code.git"
+    }
+  },
+  "claude-plugins-official": {
+    "source": {
+      "source": "github",
+      "repo": "anthropics/claude-plugins-official"
+    }
+  },
+  "anthropic-agent-skills": {
+    "source": {
+      "source": "github",
+      "repo": "anthropics/skills"
+    }
+  },
+  "cc-marketplace": {
+    "source": {
+      "source": "git",
+      "url": "https://github.com/kenryu42/cc-marketplace.git"
+    }
+  }
+}
diff --git a/config/claude/settings.json b/config/claude/settings.json
index 7b86a374d..f88559a60 100644
--- a/config/claude/settings.json
+++ b/config/claude/settings.json
@@ -9,7 +9,8 @@
     "pr-review-toolkit@claude-plugins-official": true,
     "ralph-wiggum@claude-plugins-official": true,
     "serena@claude-plugins-official": true,
-    "typescript-lsp@claude-plugins-official": true
+    "typescript-lsp@claude-plugins-official": true,
+    "safety-net@cc-marketplace": true
   },
   "permissions": {
     "allow": [