diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 368925a..3dedf84 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -9,3 +9,15 @@ updates:
       bundler:
         patterns:
           - "*"
+    cooldown:
+      default-days: 7
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    groups:
+      github-actions:
+        patterns:
+          - "*"
+    cooldown:
+      default-days: 7
diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index 4c9ab97..57a2a16 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -1,6 +1,6 @@
 name: CD
 
-on:
+on: # zizmor: ignore[dangerous-triggers] deploy-after-CI-passes is the standard rubyatscale release pattern; the called workflow only tags/publishes on main
   workflow_run:
     workflows: [CI]
     types: [completed]
@@ -10,5 +10,5 @@ jobs:
   call-workflow-from-shared-config:
     permissions:
       contents: write
-    uses: rubyatscale/shared-config/.github/workflows/cd.yml@main
+    uses: rubyatscale/shared-config/.github/workflows/cd.yml@main # zizmor: ignore[unpinned-uses,secrets-inherit] internal reusable workflow tracked at @main by convention so shared-config updates propagate automatically; environments are managed by callers
     secrets: inherit
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 51740fa..23c9dba 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ permissions:
 
 jobs:
   call-workflow-from-shared-config:
-    uses: rubyatscale/shared-config/.github/workflows/ci.yml@main
+    uses: rubyatscale/shared-config/.github/workflows/ci.yml@main # zizmor: ignore[unpinned-uses,secrets-inherit] internal reusable workflow tracked at @main by convention so shared-config updates propagate automatically; its ci.yml reads SLACK_WEBHOOK_URL but declares no workflow_call secrets, so inherit is the only way to pass it
     secrets: inherit
     with:
       test-command: "bundle exec rake"
diff --git a/.github/workflows/dependabot-tapioca.yml b/.github/workflows/dependabot-tapioca.yml
index 722a226..88ecb18 100644
--- a/.github/workflows/dependabot-tapioca.yml
+++ b/.github/workflows/dependabot-tapioca.yml
@@ -14,10 +14,10 @@ jobs:
     if: startsWith(github.head_ref, 'dependabot/')
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
-        with:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with: # zizmor: ignore[artipacked] persisted credentials required for the git push below
           ref: ${{ github.head_ref }}
-      - uses: ruby/setup-ruby@4c56a21280b36d862b5fc31348f463d60bdc55d5 # v1
+      - uses: ruby/setup-ruby@14594264cd68ce8a2345dd349bc3d138a4ef85c8 # v1.327.0
         with:
           ruby-version: '3.4'
           bundler-cache: true
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index 2696450..4d49144 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -8,4 +8,4 @@ jobs:
     permissions:
       issues: write
       pull-requests: write
-    uses: rubyatscale/shared-config/.github/workflows/stale.yml@main
+    uses: rubyatscale/shared-config/.github/workflows/stale.yml@main # zizmor: ignore[unpinned-uses] internal reusable workflow tracked at @main by convention so shared-config updates propagate automatically
diff --git a/.github/workflows/triage.yml b/.github/workflows/triage.yml
index 7c492ee..7613548 100644
--- a/.github/workflows/triage.yml
+++ b/.github/workflows/triage.yml
@@ -8,4 +8,4 @@ jobs:
   call-workflow-from-shared-config:
     permissions:
       issues: write
-    uses: rubyatscale/shared-config/.github/workflows/triage.yml@main
+    uses: rubyatscale/shared-config/.github/workflows/triage.yml@main # zizmor: ignore[unpinned-uses] internal reusable workflow tracked at @main by convention so shared-config updates propagate automatically
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
new file mode 100644
index 0000000..e5a0721
--- /dev/null
+++ b/.github/workflows/zizmor.yml
@@ -0,0 +1,16 @@
+name: GitHub Actions Security Analysis
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: ["**"]
+
+permissions: {}
+
+jobs:
+  zizmor:
+    permissions:
+      contents: read
+      security-events: write
+    uses: rubyatscale/shared-config/.github/workflows/zizmor.yml@main # zizmor: ignore[unpinned-uses] internal reusable workflow tracked at @main by convention so shared-config updates propagate automatically