From e428f56441b216737a2102981c6c94f902f5ff39 Mon Sep 17 00:00:00 2001
From: Douglas Eichelberger <doug.eichelberger@gusto.com>
Date: Mon, 31 Aug 2026 14:28:32 -0700
Subject: [PATCH] Add zizmor security scanning for GitHub Actions workflows

Runs zizmorcore/zizmor-action on push/PR with GitHub Advanced Security
(SARIF upload to the Security tab). Also resolves the two pre-existing
findings zizmor surfaced in this repo: missing Dependabot cooldown
config, and a template-injection-prone expression interpolated
directly into a run: shell block in ci.yml (now passed via env:).
---
 .github/dependabot.yml       |  2 ++
 .github/workflows/ci.yml     |  4 +++-
 .github/workflows/zizmor.yml | 25 +++++++++++++++++++++++++
 3 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 .github/workflows/zizmor.yml

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 2390d8c..274c097 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -8,3 +8,5 @@ updates:
       github-actions:
         patterns:
           - "*"
+    cooldown:
+      default-days: 7
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b7dd2ab..9b36820 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -60,8 +60,10 @@ jobs:
 
       - name: Assert the action failed
         if: steps.rubyfmt.outcome != 'failure'
+        env:
+          ACTUAL_OUTCOME: ${{ steps.rubyfmt.outcome }}
         run: |
-          echo "::error::Expected rubyfmt-action to fail on an unformatted fixture, but it reported '${{ steps.rubyfmt.outcome }}'"
+          echo "::error::Expected rubyfmt-action to fail on an unformatted fixture, but it reported '${ACTUAL_OUTCOME}'"
           exit 1
 
   test-macos:
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
new file mode 100644
index 0000000..c42ea47
--- /dev/null
+++ b/.github/workflows/zizmor.yml
@@ -0,0 +1,25 @@
+name: GitHub Actions Security Analysis with zizmor 🌈
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["**"]
+
+permissions: {}
+
+jobs:
+  zizmor:
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      contents: read
+      actions: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Run zizmor 🌈
+        uses: zizmorcore/zizmor-action@70fb788f84895a7701f5643d103d587e460b5c99 # v0.6.3