diff --git a/.github/workflows/boj-build.yml b/.github/workflows/boj-build.yml
index 7a830a0..24e2adc 100644
--- a/.github/workflows/boj-build.yml
+++ b/.github/workflows/boj-build.yml
@@ -11,7 +11,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Trigger BoJ Server (Casket/ssg-mcp)
         run: |
           # Send a secure trigger to boj-server to build this repository
diff --git a/.github/workflows/casket-pages.yml b/.github/workflows/casket-pages.yml
index 0fa899c..6534dd9 100644
--- a/.github/workflows/casket-pages.yml
+++ b/.github/workflows/casket-pages.yml
@@ -18,9 +18,9 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v4
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v4
       - name: Checkout casket-ssg
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v4
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v4
         with:
           repository: hyperpolymath/casket-ssg
           path: .casket-ssg
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 9d7166e..945f8f3 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -37,7 +37,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@8aad20d150bbac5944a9f9d289da16a4b0d87c1e # v3
diff --git a/.github/workflows/dogfood-gate.yml b/.github/workflows/dogfood-gate.yml
index f0a5baf..d6fa69e 100644
--- a/.github/workflows/dogfood-gate.yml
+++ b/.github/workflows/dogfood-gate.yml
@@ -22,7 +22,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Check for A2ML files
         id: detect
         run: |
@@ -62,7 +62,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Check for K9 files
         id: detect
         run: |
@@ -107,7 +107,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Scan for invisible characters
         id: lint
         run: |
@@ -168,7 +168,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Check for Groove manifest
         id: groove
         run: |
@@ -225,7 +225,7 @@ jobs:
     if: always()
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Generate dogfooding scorecard
         run: |
           SCORE=0
diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index e6cbb0b..d8ed5ee 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -34,7 +34,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Setup Erlang/Elixir
         uses: erlef/setup-beam@fc68ffb90438ef2936bbb3251622353b3dcb2f93 # v1.24.0
         with:
@@ -61,7 +61,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Setup Erlang/Elixir
         uses: erlef/setup-beam@fc68ffb90438ef2936bbb3251622353b3dcb2f93 # v1.24.0
         with:
diff --git a/.github/workflows/echidna-validation.yml b/.github/workflows/echidna-validation.yml
index 89aca2b..8627ea6 100644
--- a/.github/workflows/echidna-validation.yml
+++ b/.github/workflows/echidna-validation.yml
@@ -25,7 +25,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout code
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       # Required-check shim: only audited Rust sources need the real audit. The
       # workflow file itself is NOT in the pattern so CI-only edits pass through.
       - name: Detect relevant changes
diff --git a/.github/workflows/gitbot-fleet.yml b/.github/workflows/gitbot-fleet.yml
index 9dd4742..a04f3cf 100644
--- a/.github/workflows/gitbot-fleet.yml
+++ b/.github/workflows/gitbot-fleet.yml
@@ -13,7 +13,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Clone gitbot-fleet + hypatia
         run: |
           mkdir -p _bot
diff --git a/.github/workflows/nif-build.yml b/.github/workflows/nif-build.yml
index edf24fa..1405c19 100644
--- a/.github/workflows/nif-build.yml
+++ b/.github/workflows/nif-build.yml
@@ -23,7 +23,7 @@ jobs:
     timeout-minutes: 30
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@4be9e76fd7c4901c61fb841f559994984270fce7 # stable
       - name: Cache Rust build
diff --git a/.github/workflows/secret-scanner.yml b/.github/workflows/secret-scanner.yml
index 4fda4f9..ea3be5b 100644
--- a/.github/workflows/secret-scanner.yml
+++ b/.github/workflows/secret-scanner.yml
@@ -18,7 +18,7 @@ jobs:
   trufflehog:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
         with:
           fetch-depth: 0
       - name: TruffleHog Secret Scan
diff --git a/.github/workflows/trust-pipeline-e2e.yml b/.github/workflows/trust-pipeline-e2e.yml
index 63f3540..8a099e4 100644
--- a/.github/workflows/trust-pipeline-e2e.yml
+++ b/.github/workflows/trust-pipeline-e2e.yml
@@ -33,7 +33,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           submodules: false
       # -----------------------------------------------------------------------
diff --git a/.github/workflows/trust-pipeline-images.yml b/.github/workflows/trust-pipeline-images.yml
index dd490fb..4321ece 100644
--- a/.github/workflows/trust-pipeline-images.yml
+++ b/.github/workflows/trust-pipeline-images.yml
@@ -41,7 +41,7 @@ jobs:
           - service: cerro-torre
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
       - name: Log in to GHCR