diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index dbaff42..9e32d15 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: PMPL-1.0
 name: CodeQL Security Analysis
 
 on:
@@ -9,7 +9,16 @@ on:
   schedule:
     - cron: '0 6 * * 1'
 
-permissions: read-all
+# Estate guardrail: cancel superseded runs so re-pushes / rebased PR
+# updates do not pile up queued runs against the shared account-wide
+# Actions concurrency pool. Applied only to read-only check workflows
+# (no publish/mutation), so cancelling a superseded run is always safe.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
 
 jobs:
   analyze:
@@ -26,20 +35,15 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@cdefb33c0f6224e58673d9004f47f7cb3e328b89 # v3.28.1
+        uses: github/codeql-action/init@c6f931105cb2c34c8f901cc885ba1e2e259cf745 # v3
         with:
           languages: ${{ matrix.language }}
           build-mode: ${{ matrix.build-mode }}
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@cdefb33c0f6224e58673d9004f47f7cb3e328b89 # v3.28.1
+        uses: github/codeql-action/analyze@c6f931105cb2c34c8f901cc885ba1e2e259cf745 # v3
         with:
           category: "/language:${{ matrix.language }}"
-
-  - name: K9-SVC Validation
-    run: |
-      echo "K9-SVC validation"
-      [ -d .machine_readable/contractiles ] && echo "Contractiles present" || echo "No contractiles"
diff --git a/.github/workflows/scorecard-enforcer.yml b/.github/workflows/scorecard-enforcer.yml
index 3d219fb..04206c0 100644
--- a/.github/workflows/scorecard-enforcer.yml
+++ b/.github/workflows/scorecard-enforcer.yml
@@ -17,7 +17,8 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
-permissions: read-all
+permissions:
+  contents: read
 
 jobs:
   scorecard:
@@ -26,7 +27,7 @@ jobs:
       security-events: write
       id-token: write  # For OIDC
     steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 
@@ -38,7 +39,7 @@ jobs:
           publish_results: true
 
       - name: Upload SARIF
-        uses: github/codeql-action/upload-sarif@cdefb33c0f6224e58673d9004f47f7cb3e328b89 # v3
+        uses: github/codeql-action/upload-sarif@c6f931105cb2c34c8f901cc885ba1e2e259cf745 # v4
         with:
           sarif_file: results.sarif
 
@@ -61,7 +62,7 @@ jobs:
   check-critical:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Check SECURITY.md exists
         run: |
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
index 1b3b525..29853b2 100644
--- a/.github/workflows/scorecard.yml
+++ b/.github/workflows/scorecard.yml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: PMPL-1.0
 name: OSSF Scorecard
 on:
   push:
@@ -15,7 +15,8 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
-permissions: read-all
+permissions:
+  contents: read
 
 jobs:
   analysis:
@@ -24,7 +25,7 @@ jobs:
       security-events: write
       id-token: write
     steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 
@@ -35,6 +36,6 @@ jobs:
           results_format: sarif
 
       - name: Upload results
-        uses: github/codeql-action/upload-sarif@cdefb33c0f6224e58673d9004f47f7cb3e328b89 # v3.31.8
+        uses: github/codeql-action/upload-sarif@c6f931105cb2c34c8f901cc885ba1e2e259cf745 # v3.31.8
         with:
           sarif_file: results.sarif
diff --git a/.github/workflows/secret-scanner.yml b/.github/workflows/secret-scanner.yml
index 552c087..8801d53 100644
--- a/.github/workflows/secret-scanner.yml
+++ b/.github/workflows/secret-scanner.yml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: PMPL-1.0
 # Prevention workflow - scans for hardcoded secrets before they reach main
 name: Secret Scanner
 
@@ -15,25 +15,28 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
-permissions: read-all
+permissions:
+  contents: read
 
 jobs:
   trufflehog:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v4
         with:
           fetch-depth: 0  # Full history for scanning
 
       - name: TruffleHog Secret Scan
-        uses: trufflesecurity/trufflehog@116e7171542d2f1dad8810f00dcfacbe0b809183 # v3
+        uses: trufflesecurity/trufflehog@6c05c4a00b91aa542267d8e32a8254774799d68d # v3
         with:
-          extra_args: --only-verified --fail
+          # The v3 action injects --fail automatically on pull_request events.
+          # Passing --fail here triggers "flag 'fail' cannot be repeated".
+          extra_args: --only-verified
 
   gitleaks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v4
         with:
           fetch-depth: 0
 
@@ -45,12 +48,15 @@ jobs:
   # Rust-specific: Check for hardcoded crypto values
   rust-secrets:
     runs-on: ubuntu-latest
-    if: hashFiles('**/Cargo.toml') != ''
     steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v4
 
       - name: Check for hardcoded secrets in Rust
         run: |
+          if ! find . -name Cargo.toml -not -path './target/*' -print -quit | grep -q .; then
+            echo 'No Cargo.toml found — skipping Rust secrets check'
+            exit 0
+          fi
           # Patterns that suggest hardcoded secrets
           PATTERNS=(
             'const.*SECRET.*=.*"'