From d63f89a42302dbbc2d2dc0a7903cc08a07ea7495 Mon Sep 17 00:00:00 2001
From: mdheller <21163552+mdheller@users.noreply.github.com>
Date: Sat, 4 Jul 2026 19:57:05 -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?=
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Pin every GitHub Action to its full commit SHA (floating tags are a supply-chain
injection vector), add top-level `permissions: contents: read` (least privilege), and
add dependabot to keep the pins maintained.
---
 .github/dependabot.yml         | 6 ++++++
 .github/workflows/validate.yml | 7 +++++--
 2 files changed, 11 insertions(+), 2 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 8f8d0cb..36b5cb5 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -2,12 +2,15 @@ name: validate
 on:
   push:
   pull_request:
+permissions:
+  contents: read
+
 jobs:
   validate:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: "3.12"
       - name: Install strict-validation deps