diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000..0b0ac6c
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,32 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [main, dev]
+  pull_request:
+    branches: [main, dev]
+  schedule:
+    - cron: "24 3 * * 1"
+
+permissions:
+  security-events: write
+  packages: read
+  actions: read
+  contents: read
+
+jobs:
+  analyze:
+    name: Analyze JavaScript
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v4
+        with:
+          languages: javascript-typescript
+
+      - name: Perform CodeQL analysis
+        uses: github/codeql-action/analyze@v4
diff --git a/.github/workflows/promote-to-main.yml b/.github/workflows/promote-to-main.yml
index 0335bc7..e049591 100644
--- a/.github/workflows/promote-to-main.yml
+++ b/.github/workflows/promote-to-main.yml
@@ -32,7 +32,7 @@ jobs:
           exit 1
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
diff --git a/src/components/RSkills.jsx b/src/components/RSkills.jsx
index d328f8c..f1ac014 100644
--- a/src/components/RSkills.jsx
+++ b/src/components/RSkills.jsx
@@ -125,6 +125,7 @@ function colorize(text) {
 }
 function colorVal(s) {
   const out = [];
+  // Match either a double-quoted string (group 1) or a number (integer/decimal, group 2).
   const re = /("[^"]*")|(\b\d+\.\d+\b|\b\d+\b)/g;
   let last = 0;
   let mm;
@@ -148,7 +149,7 @@ export default function RSkills() {
   const [active, setActive] = useState(KINDS[0].kind);
   // Auto-cycle through the kinds every 3s until the user picks a tab.
   const [autoplay, setAutoplay] = useState(true);
-  const current = KINDS.find((k) => k.kind === active);
+  const current = KINDS.find((k) => k.kind === active) || KINDS[0];
 
   useEffect(() => {
     if (!autoplay || reduce) return;