diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4ba7db14..017e4de3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -48,7 +48,7 @@ jobs:
     # 3.14 is signal-only (#551) — see header comment. 3.12/3.13 stay blocking.
     continue-on-error: ${{ matrix.python-version == '3.14' }}
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           # Full history required for scripts/pii_history_guard.py --full-history (PII in old commits).
           fetch-depth: 0
@@ -88,7 +88,7 @@ jobs:
     name: Lint (pre-commit)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           fetch-depth: 0
           persist-credentials: false
@@ -115,7 +115,7 @@ jobs:
     name: Bandit (strict)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
 
@@ -143,7 +143,7 @@ jobs:
     name: Dependency audit
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
 
@@ -180,7 +180,7 @@ jobs:
       contents: read
       pull-requests: read
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
 
@@ -196,7 +196,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           fetch-depth: 0
           persist-credentials: false
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 429cd89b..58b671af 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -26,7 +26,7 @@ jobs:
       actions: read # Required for Claude to read CI results on PRs
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           fetch-depth: 1
           persist-credentials: false
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 4660af59..1d4c23ff 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -35,7 +35,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/dependabot-sync.yml b/.github/workflows/dependabot-sync.yml
index 7d28876c..6eb339e6 100644
--- a/.github/workflows/dependabot-sync.yml
+++ b/.github/workflows/dependabot-sync.yml
@@ -27,7 +27,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout PR branch
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           ref: ${{ github.event.pull_request.head.ref }}
           fetch-depth: 0
diff --git a/.github/workflows/gitleaks.yml b/.github/workflows/gitleaks.yml
index e28ad9aa..74bff810 100644
--- a/.github/workflows/gitleaks.yml
+++ b/.github/workflows/gitleaks.yml
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           fetch-depth: 0
           persist-credentials: false
diff --git a/.github/workflows/operator-gated-reopen.yml b/.github/workflows/operator-gated-reopen.yml
index 0d86e575..f46c1ca8 100644
--- a/.github/workflows/operator-gated-reopen.yml
+++ b/.github/workflows/operator-gated-reopen.yml
@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout (SSHSIG verify)
-        uses: actions/checkout@de0fac2e93aed2066c531a69177474906a2fae52 # v6.0.2
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.2
         with:
           sparse-checkout: |
             scripts/gate_trailer_attest.py
diff --git a/.github/workflows/publish-pypi.yml b/.github/workflows/publish-pypi.yml
index 068456b2..acae118e 100644
--- a/.github/workflows/publish-pypi.yml
+++ b/.github/workflows/publish-pypi.yml
@@ -30,7 +30,7 @@ jobs:
     timeout-minutes: 30
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/rust-ci.yml b/.github/workflows/rust-ci.yml
index 5bb0a670..8bcf7cc0 100644
--- a/.github/workflows/rust-ci.yml
+++ b/.github/workflows/rust-ci.yml
@@ -41,7 +41,7 @@ jobs:
     name: cargo check / test / clippy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/sbom.yml b/.github/workflows/sbom.yml
index e29652a5..bdbad569 100644
--- a/.github/workflows/sbom.yml
+++ b/.github/workflows/sbom.yml
@@ -43,7 +43,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           fetch-depth: 0
           persist-credentials: false
diff --git a/.github/workflows/semgrep.yml b/.github/workflows/semgrep.yml
index b50d3859..d468e09d 100644
--- a/.github/workflows/semgrep.yml
+++ b/.github/workflows/semgrep.yml
@@ -19,7 +19,7 @@ jobs:
     container:
       image: semgrep/semgrep:1.117.0@sha256:a256468ff217498bfde2f44bd74dd2ffd0460bd08fabbbec009dbdeb4870f4dc
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/slack-ops-digest.yml b/.github/workflows/slack-ops-digest.yml
index 25c51024..0675b491 100644
--- a/.github/workflows/slack-ops-digest.yml
+++ b/.github/workflows/slack-ops-digest.yml
@@ -42,7 +42,7 @@ jobs:
             echo "SLACK_WEBHOOK_URL is unset; downstream steps will skip cleanly."
           fi
 
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         if: steps.webhook.outputs.present == 'true'
         with:
           fetch-depth: 0
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
index ff0d7e17..bf751b08 100644
--- a/.github/workflows/zizmor.yml
+++ b/.github/workflows/zizmor.yml
@@ -44,7 +44,7 @@ jobs:
       ENFORCE_ZIZMOR: ${{ github.event_name == 'workflow_dispatch' && (inputs.enforce && 'true' || 'false') || (vars.ZIZMOR_ENFORCE == 'false' && 'false' || 'true') }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false