From cb790fbebc1acdb9f532e7730b6f3afdba5f2224 Mon Sep 17 00:00:00 2001
From: mdheller <21163552+mdheller@users.noreply.github.com>
Date: Sat, 4 Jul 2026 21:18:43 -0400
Subject: [PATCH] =?UTF-8?q?chore(ci):=20harden=20supply=20chain=20?=
 =?UTF-8?q?=E2=80=94=20pin=20actions=20to=20SHA=20+=20least-privilege=20pe?=
 =?UTF-8?q?rmissions?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Pin GitHub Actions to full commit SHA (floating tags are a supply-chain injection
vector), add least-privilege permissions, and add dependabot to maintain the pins.
---
 .github/dependabot.yml         | 6 ++++++
 .github/workflows/validate.yml | 8 +++++---
 2 files changed, 11 insertions(+), 3 deletions(-)
 create mode 100644 .github/dependabot.yml

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..5ace460
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index a02b80a..eb0ba35 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -6,15 +6,17 @@ on:
     branches:
       - main
 
+permissions:
+  contents: read
+
 jobs:
   validate:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
-
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: '3.12'